Patreon for neon sign making creators — 2026 edition

Gas discharge physics Paschen curve breakdown voltage noble gas emission spectra neon 585nm 640nm orange-red argon 696nm pale lavender mercury vapor Penning ionization, phosphor coatings UV excitation CAB binder bake 350–450°C, soft glass COE 92 ribbon burner back-pressure tube bending, cold cathode electrode BaO·SrO bombarding outgassing BaO→Ba activation, vacuum manifold rotary vane pump neon 7–12 Torr argon-mercury 2–6 Torr flame-off tubulation, NST transformer magnetic shunt leakage reactance GFI electronic sign transformer, and the Apple Tax.

Neon sign making Patreons retain when they deliver the physics and process documentation layer that glass-bending time-lapses and glowing finished-sign photographs structurally compress away: the gas discharge physics explaining why specific noble gases produce specific colors (the Paschen curve breakdown voltage relationship, neon’s orange-red emission line cluster at 585–703nm versus argon’s near-IR-shifted pale lavender, and how mercury Penning ionization lowers breakdown voltage in Ar/Ne mixtures), the phosphor coating chemistry that converts mercury’s 253.7nm UV output into any visible color (calcium halophosphate warm white, BAM BaMgAl₁₀O₁₇:Eu²⁺ blue, Y₂O₃:Eu³⁺ red, application in CAB binder baked at 350–450°C), the mechanics of soft glass COE 92 tube bending on a ribbon burner (back-pressure maintenance at 5–20 PSI preventing collapse, flame zone position for 15mm tube), cold cathode electrode construction and the bombarding procedure (why BaO must be reduced to Ba metal at 600–800°C and what happens when it is not), the vacuum manifold fill process (rotary vane pump to 10–50 mTorr, neon fill to 7–12 Torr, argon-mercury fill with 15–30mg mercury per meter, flame-off tubulation seal), and transformer selection (NST magnetic shunt leakage reactance current limiting, GFI protection under NEC Article 600, electronic sign transformer inverter topology).

1. Gas discharge physics and noble gas emission spectra

Every neon sign is a controlled gas discharge: a sealed glass tube containing a noble gas at low pressure through which a sustained electrical current passes, exciting gas atoms to higher electronic energy states that then relax by emitting photons at wavelengths characteristic of each element. The first quantitative description of when this discharge initiates is the Paschen curve, which describes breakdown voltage as a function of the product of gas pressure (p) and electrode separation (d). The Paschen relationship exists because breakdown depends on the probability of an electron making an ionizing collision during its acceleration across the gap: at very low p×d values, the mean free path is so long that electrons traverse the gap without collision; at very high p×d, the mean free path is short but electrons gain so little energy between collisions that few reach ionization threshold. Between these extremes is a minimum breakdown voltage that is characteristic of each gas. For neon, the minimum breakdown voltage is approximately 245 V at p×d ≈ 5.3 Torr·cm. In practice, neon sign tubes operate at fill pressures (7–12 Torr) and electrode separations that place them to the right of the Paschen minimum, requiring the higher transformer open-circuit voltages (3–15 kV) necessary to initiate discharge.

Neon’s emission spectrum is responsible for its iconic warm orange-red color. The principal visible lines are at 585.2 nm (yellow-orange), 614.3 nm (orange), 638.3 nm (orange-red), 640.2 nm (the most intense line, red-orange), 659.9 nm (red), 692.9 nm (deep red), and 703.2 nm (deep red). This tight cluster of closely spaced lines in the 585–703 nm band collectively produces the warm glow that the human eye perceives as neon orange-red. There are additional neon lines in the near-IR and UV, but these are not visible and do not contribute to color perception. The neon spectrum is the unmodified gas discharge emission — no phosphor is needed to produce neon color; a clear glass tube filled with neon gas glows orange-red directly.

Argon produces a fundamentally different discharge. Its principal emission lines fall at 696.5 nm, 706.7 nm, 750.4 nm, and 764.5 nm — red and near-infrared wavelengths where human visual sensitivity is low. The result is that a clear glass tube filled with pure argon produces only a pale lavender or blue-grey glow, because the small amount of visible emission (principally the 696.5 nm and 706.7 nm lines) carries little total luminous energy. Argon is therefore not used alone for decorative sign work; instead, it is used in combination with mercury vapor in phosphor-coated tubes where the argon sustains the discharge and excites mercury, and the mercury UV output drives the phosphors.

Mercury vapor is the key intermediary in the argon-mercury-phosphor system. Mercury at operating temperature (the small liquid mercury reservoir in the tube warms to approximately 25–40°C during normal operation) maintains a vapor pressure of approximately 0.0023 Torr (2.4 Pa) at 25°C — very low, but sufficient to dominate certain emission processes. Mercury’s emission lines include 253.7 nm (UV resonance transition, the strongest UV line and the primary driver of phosphor excitation in fluorescent and neon tube applications), 184.9 nm (far-UV, also useful for phosphor excitation but absorbed by most glasses), 404.7 nm (violet, visible), 435.8 nm (blue-violet, visible), 546.1 nm (green, visible), and a yellow doublet at 577/579 nm. In tubes without phosphor coating, the visible mercury lines produce the characteristic blue-white glow associated with bare Ar/Hg discharge. The Penning ionization mechanism lowers the breakdown voltage of neon-argon mixtures: neon metastable atoms (Ne*, with excitation energy approximately 16.6 eV) collide with argon atoms (first ionization energy 15.76 eV), transferring energy: Ne* + Ar → Ne + Ar⁺ + e⁻. This additional ionization pathway, which occurs when 0.1–0.5% Ar is present in Ne, reduces the effective breakdown voltage of the mixture below that of either pure gas alone. Commercial neon gas for sign work is supplied with a trace argon addition for this reason.

2. Phosphor coatings for colored light

In argon-mercury tubes, the 253.7 nm and 184.9 nm UV photons from mercury vapor strike phosphor particles coated on the interior glass wall and excite electrons in the phosphor to higher energy states. As electrons return to ground state, they emit visible photons at wavelengths determined by the phosphor material — a process called photoluminescence or, in this industrial context, UV-down-conversion. By choosing the phosphor formulation, the tube designer can produce any visible color from the same argon-mercury discharge, independent of the gas emission. This is the mechanism that allows neon sign makers to produce blue, green, red, pink, white, and any mixed-color tube from the same gas fill.

White tubes use one of two phosphor systems. The traditional warm white is calcium halophosphate: Ca₅(PO₄)₃(F,Cl):Sb,Mn — the same phosphor used in the original fluorescent lamps. Antimony (³⁺) ions absorb UV and emit blue, transferring some energy to manganese ions that emit orange; the combination produces warm white light similar to incandescent. Modern sign work uses tri-band rare-earth phosphor blends: Eu³⁺-activated Y₂O₃ (red, peak 611 nm) plus Tb³⁺-activated LaPO₄ or gadolinium compounds (green, approximately 543 nm) plus Eu²⁺-activated BaMgAl₁₀O₁₇ (blue, peak 450 nm). The tri-band system produces a brighter, higher color rendering index white because the three narrow-band phosphors map efficiently onto the three primary color receptor peaks of human vision.

Specific color phosphors and their principal emission peaks: blue — barium magnesium aluminate BaMgAl₁₀O₁₇:Eu²⁺ (BAM phosphor), peak 450 nm; green — lanthanum phosphate LaPO₄:Ce,Tb, peak approximately 543 nm, or zinc silicate Zn₂SiO₄:Mn, peak 525 nm (the zinc silicate is the older formulation; LaPO₄:Ce,Tb is the modern high-efficacy version); red — europium-activated yttrium oxide Y₂O₃:Eu³⁺, peak 611 nm (the narrow emission peak produces a vivid, saturated red that the older cadmium sulfide phosphors could not match); pink and peach — diluted Y₂O₃:Eu³⁺ red mixed with white phosphor in varying ratios; gold and yellow — mixtures of red and green phosphors.

Phosphor application method: phosphor particles (particle size distribution 5–15 µm) are suspended in a solution of cellulose acetate butyrate (CAB) binder dissolved in organic solvent (butyl acetate, acetone, or a blend). The CAB-solvent solution serves as a viscous carrier that keeps the phosphor particles uniformly suspended and provides adhesion to the glass during application. To coat the tube interior: pour phosphor suspension into one end of the glass tube, tilt the tube to flow the suspension along the entire interior length, then drain the excess from the far end; the CAB solution coats the glass wall with a thin layer of suspended phosphor. After draining, the tube is placed horizontally in a baking oven at 350–450°C for several minutes to drive off the organic solvent and pyrolyze (burn off) the CAB binder, leaving only the inorganic phosphor particles adhered to the glass by their own surface energy and any thin glassy residue. The target phosphor layer is 0.2–0.4 mm thick on the glass wall. Document: phosphor formulation code, CAB concentration in solvent (weight percent), application temperature, drain time, bake temperature, and bake time. Too thin a layer and the UV is not fully absorbed, producing reduced brightness and color purity; too thick and the phosphor layer absorbs its own emission (self-absorption), reducing efficiency. Visual inspection against a bright light source after baking reveals pinholes (under-coated areas showing clear glass).

3. Glass types and ribbon burner mechanics

Soft glass (soda-lime glass) with a coefficient of thermal expansion (COE) of approximately 92 × 10⁻⁷/°C is the standard substrate for neon tube work. The principal soft glasses used are Kimble N-51A (also known as Kimble KG-12) and equivalent Corning formulations. Soft glass has a working temperature range of 900–1050°C — the temperature at which the glass is viscous enough to bend, shape, and seal, but not so fluid that it loses form control. The principal tube diameters: 12 mm (fine detail, lettering, small signs), 15 mm (the standard workhorse diameter for most commercial signage), 18 mm (medium-large work), 20–25 mm (oversized decorative neon). Tube wall thickness is typically 1.0–1.5 mm for standard work. Borosilicate glass (COE 33, Corning 7740 / Pyrex) requires working temperatures above 1200°C and is much more difficult to manipulate with a ribbon burner; it is used for scientific tube work and specialty applications but is not standard for decorative neon sign production.

Colored glass tubes have the color fused into the exterior glass surface during manufacturing. Exterior color modifies the final emitted light by selective wavelength transmission: a blue exterior glass (containing cobalt oxide or copper oxide as the colorant) passes blue-to-green wavelengths while absorbing orange-red; neon gas in blue glass is effectively extinguished (the orange-red neon emission is absorbed by the blue glass). Argon-mercury + blue phosphor in blue exterior glass produces a deep, saturated blue by the additive spectral narrowing of both phosphor and glass filtration. Ruby or red exterior glass (selenium/cadmium colorant) transmits red wavelengths; neon gas in ruby glass passes the red portion of the neon emission while the glass filters the more orange-yellow components, shifting the perceived color toward a warmer deep rose-red. Design documentation: always record glass tube supplier, COE designation, diameter (mm), and exterior color code alongside fill gas type and phosphor specification, because the visual outcome is the product of all three.

The ribbon burner is the primary heat source for bending and sealing glass tube work. It consists of a copper or stainless steel manifold pipe 12–36 inches long with either a row of 1/16-inch diameter holes drilled every 1/4 inch along the top, or a continuous 1/16-inch slot running the full length. Natural gas (or propane, with a slightly different burner orifice sizing) flows through the manifold at controlled pressure and burns at the holes or slot in a continuous ribbon of flame 12–24 inches wide, open to room air without forced air injection. The flame temperature at the working zone is 900–1050°C, precisely matching the soft glass working range. The ribbon burner produces two distinct flame zones: the primary flame (inner blue cone, highest temperature, complete combustion) and the secondary luminous zone (outer yellow-orange flame, slightly cooler, diffusion combustion). Glass should be held in the secondary zone, not in the primary blue cone: the secondary zone provides more uniform heating over the tube length and avoids the concentrated hot spots that the primary cone can produce.

Working height above the ribbon burner: a 15 mm tube is typically held 40–60 mm above the burner surface (measured from the top of the burner manifold to the center of the tube). Too close and the tube absorbs heat faster than it can equilibrate longitudinally, creating hot spots that cause the tube to sag or distort unevenly; too far and the tube heats slowly and may not reach working temperature uniformly. Practice establishes the correct height for each tube diameter. Back-pressure during bending is the critical technique variable for maintaining tube cross-section: air pressure (5–20 PSI) is maintained inside the tube during the heating and bending operation using a rubber squeeze bulb connected to one end of the tube or a regulated air line with a needle valve. Correct back-pressure: the tube softens and can be bent to the required curve while the internal pressure prevents the walls from collapsing inward at the bend radius. Signs of too much pressure: the tube resists bending because the internal air pressure stiffens the softened glass (may require a lower pressure or higher heat); in the extreme, back-pressure can cause the tube to balloon outward at thin spots or crack at stress points. Signs of too little pressure: the tube collapses at the bend, producing an elliptical or pinched cross-section that restricts gas flow and disrupts the discharge. Document back-pressure in PSI per tube diameter and glass type per bending session; the correct pressure varies with glass temperature (higher glass temperature requires lower back-pressure) and tube diameter.

4. Electrode construction and bombarding procedure

Cold cathode electrodes are the engineered components that initiate and sustain the glow discharge inside the tube. The basic geometry is a cylindrical shell: nickel or iron, 8–12 mm outer diameter, 30–75 mm length (longer electrodes are used for higher-power, longer-tube applications). The cylinder is sealed inside a glass envelope — a short glass tube section fused to the end of the neon tube — with the lead wires passing through a glass-to-metal seal at the back. The glass-to-metal seal uses Kovar alloy (a nickel-iron-cobalt alloy with a CTE matched to the borosilicate glass of the electrode envelope, approximately 5 × 10⁻⁶/°C) or a similarly matched expansion glass seal. An imperfect glass-to-metal seal is the most common site of air leakage in a failed tube: even a microscopic crack allows atmospheric gas to slowly leak into the evacuated tube, and the effect is catastrophic — the tube blackens near the electrode within hours as the electrode coating oxidizes and the discharge becomes unstable.

The interior surface of the nickel or iron shell is coated with a barium-strontium oxide emission compound. This coating is applied during electrode fabrication: a slurry of barium acetate [Ba(CH₃COO)₂] and strontium acetate [Sr(CH₃COO)₂] dissolved in water or a water-alcohol mixture is applied to the inside of the shell (by dipping or brushing), and the electrode is then baked at approximately 700°C to decompose the acetates to BaO and SrO (the acetate functional groups burn off as CO₂ and water vapor), leaving the mixed oxide coating BaO·0.3–0.5SrO on the metal surface. The SrO component stabilizes the BaO against excessive volatilization and improves coating durability. At this stage, the electrode is ready for assembly but the BaO coating is not yet the efficient electron emitter needed for tube operation — that activation occurs during bombarding.

The glass-to-tube end seal is made by heating the end of the neon glass tube to working temperature and pressing it against the glass envelope of the electrode, fusing the two glass surfaces together into a continuous hermetic seal. The assembled tube (glass tube body + two electrodes fused at each end + the exhaust tubulation port, a small-diameter glass tube sealed into the tube wall for manifold connection) is now structurally complete and ready for the vacuum manifold.

Bombarding procedure: (1) Connect the tube to the manifold station via the exhaust tubulation; open the manifold valve. (2) Pump down to 0.5–1.5 Torr with the rotary vane roughing pump; monitor pressure with the manifold manometer. (3) Connect the bombarding transformer leads to the two electrode lead wires. The bombarding transformer secondary: 5,000–30,000 V, operating at several kHz high frequency, power rating 400 W–2 kW depending on tube length and electrode size. Larger, longer tubes require higher-power bombarders to heat the electrodes to the required temperature in reasonable time. (4) Switch on the bombarding transformer; a glow discharge forms inside the tube at the reduced pressure. The discharge heats the tube glass walls to approximately 100°C, driving off adsorbed water vapor, CO₂, and other volatile contaminants from the glass surface. The manifold milliamp meter will show current drift during this early phase as outgassing is still occurring; wait for the current reading to stabilize before assessing electrode temperature. (5) Continue bombarding as the electrodes heat: the nickel or iron shell absorbs energy from the discharge and rises in temperature. Electrode temperature is assessed visually by color: dull red indicates approximately 600°C; bright cherry red approximately 700–750°C; orange-cherry approximately 800°C (the target). As the electrodes heat to 600–800°C, the BaO coating undergoes reduction: BaO + reducing species (H₂, CO from the discharge, or simply thermally at vacuum) → Ba + ½O₂. The barium metal produced is the actual low-work-function electron emitter (work function approximately 2.5 eV for Ba vs. 4.7–5.2 eV for nickel) that makes the electrode efficient at low voltage. The oxygen released is pumped away through the still-open manifold connection. (6) Duration: 15–45 minutes depending on tube length and electrode size; the target is sustained orange-cherry color at the electrode visible through the glass for at least 5–10 minutes. (7) Final check: monitor the manifold milliamp reading at the current pressure; a stable reading indicates that outgassing is complete and the vacuum inside the tube is holding. Rising current drift indicates ongoing outgassing or an air leak. Document: start time, initial tube current at start pressure, electrode color achieved and sustained duration, final manifold pressure, and milliamp stability at finish.

5. Vacuum manifold and gas filling

The vacuum manifold is the glass or welded steel plumbing assembly that connects multiple tube stations to a common vacuum pump header and gas supply cylinders. A typical studio manifold has 4–12 individual tube stations, each with its own isolation valve (glass stopcock or stainless ball valve), plus a common header to the roughing pump, a high-vacuum gauge, and valved connections to neon and argon gas cylinders. Manifold material: traditional systems use thick-wall glass tubing with glass stopcocks (extremely inert, visible leaks, fragile); modern systems use stainless steel tubing with stainless valves (more durable but not visually transparent). Both systems require vacuum-rated fittings and careful attention to o-ring seal maintenance.

The roughing pump is a rotary vane oil-sealed mechanical vacuum pump: Welch, Alcatel, or Edwards models rated at 1.5–12 CFM displacement. A properly maintained rotary vane pump achieves ultimate pressure of 10–50 mTorr (0.01–0.05 Torr). Pump oil maintenance is the single most important pump maintenance item: oil becomes contaminated with water vapor, solvents, and polymerized hydrocarbons during normal operation; oil should be changed quarterly in active studio use or when the pump no longer reaches base pressure below 50 mTorr. Oil observation: the inspection window on the pump body shows oil color; fresh oil is clear amber; contaminated oil is dark brown or cloudy. Oil type: Welch Duo-Seal or equivalent vacuum pump oil (not general-purpose lubricating oil, which has too high a vapor pressure). A failing pump that cannot reach 50 mTorr will produce tubes filled to incorrect pressure, with too-high residual atmospheric gas that shifts tube color and raises starting voltage.

Gas fill pressures and procedure. After bombarding is complete on a tube, the sequence is: (1) pump the tube down through the manifold to base pressure below 0.5 mTorr, run the high-vacuum stage for 5–15 minutes to allow continued outgassing at ultra-low pressure; (2) for neon tubes, open the neon cylinder valve and needle valve to back-fill with neon to the target fill pressure. Standard fill pressure for neon sign work is 7–12 Torr as measured on the calibrated manifold manometer. Lower pressure (7–8 Torr) produces deeper color and easier starting at the cost of marginally lower brightness; higher pressure (10–12 Torr) produces brighter, slightly lighter color with a higher starting voltage requirement. (3) For argon-mercury tubes, fill with argon to 2–6 Torr through the needle valve; mercury is introduced as a small liquid droplet of 15–30 mg per meter of tube length, measured using a calibrated capillary dispenser (a glass capillary tube with known bore diameter and scale markings, filled with liquid mercury and dispensed volumetrically) or a calibrated syringe through a septum port on the manifold. The mercury droplet is pulled into the tube by the partial vacuum and distributed by tilting; it provides a reservoir of liquid mercury that maintains the vapor pressure during operation as mercury deposits on cool tube ends. (4) After filling to target pressure, make a test discharge observation by connecting the tube to a test transformer and observing color and uniformity of discharge — the color observation at this stage is the primary quality check before permanent sealing. Adjust pressure if color is off specification. (5) Seal the exhaust tubulation (the small glass connection tube to the manifold) by flame-off: heat the tubulation glass close to the manifold connection with a gas-air torch until the glass softens and the atmospheric pressure outside pinches the softened tube wall closed; the tube wall collapses and seals under atmospheric pressure. Continue heating briefly to ensure a fully sealed, rounded tip. The sealed tube is now a finished, independent unit. Document: fill gas type and cylinder identification, target fill pressure, actual fill pressure measured on manifold manometer, mercury quantity in mg for Hg tubes, test discharge color observation, flame-off time and operator.

6. Transformer selection and the Apple Tax

The neon sign transformer (NST) is a magnetically shunted isolation transformer specifically engineered to drive gas discharge loads. Secondary output voltages: 3000 V, 6000 V, 7500 V, 9000 V, 10000 V, 12000 V, and 15000 V at open circuit. Current ratings: 20 mA, 30 mA, 60 mA, and 120 mA. The nameplate VA rating is the product of secondary voltage and rated current. The standard loading rule for sizing transformers: each foot of 15 mm soft glass tube at standard fill pressure draws approximately 1000 V plus 30 mA at 120 V supply. A 3-foot sign requires 3000 V × 30 mA = 90 VA; select the next larger standard rating (here a 3000 V/30 mA = 90 VA transformer would be at 100% of nameplate — select a 3000 V/60 mA to allow headroom, or a 6000 V/30 mA if the tube configuration calls for series wiring that presents higher total impedance).

The magnetic shunt is the key engineering feature that makes an NST a current-limiting power supply matched to gas discharge loads. Ferromagnetic steel shunt plates are inserted in the transformer core between the primary and secondary coil sections. At high secondary current, significant magnetic flux is diverted through the shunt path rather than linking fully to the secondary — the reduced flux coupling lowers effective mutual inductance and increases the leakage reactance (the inductive impedance due to non-coupled flux). Leakage reactance acts as a series impedance that increases with current, producing a drooping volt-ampere characteristic: high output voltage at no load, substantially reduced voltage at rated current, and a safe limited current at short circuit (approximately 1.5–2× rated current). This characteristic matches the gas discharge’s negative dynamic impedance load (where voltage drops as current rises once discharge is initiated), achieving a stable operating point without external current-limiting resistors. A properly rated NST with intact magnetic shunts will withstand indefinite short-circuit operation without failure. NEC Article 600 has required ground fault interrupter (GFI) protection on all listed neon sign transformers since 2002: the GFI trips at approximately 5 mA ground fault current, protecting against shock hazard from insulation failure or a cracked tube leaking discharge current to ground. Test the GFI trip function with the test button before each installation.

Electronic sign transformers (EST) use a switching inverter topology: the primary input (120 V or 240 V AC) is rectified to DC, switched at 40–130 kHz by power MOSFETs or IGBTs, and coupled through a high-frequency transformer to produce the required high-voltage output. Operating at high frequency rather than 50/60 Hz, the EST can use a physically much smaller transformer core and achieve efficiency above 90% (vs. approximately 85% for magnetic NSTs). ESTs are substantially lighter and smaller for the same VA rating, and many models include analog or PWM dimming control through adjustable output frequency or duty cycle. The absence of magnetic shunts means short-circuit protection must be provided by the electronic control circuit; verify that any EST used in a production installation has a documented short-circuit current limit and a thermally protected housing.

Series wiring: when multiple tube sections are connected in a sign, they are typically wired in series (current flows through all tubes in sequence; if one tube fails open-circuit, the entire string goes dark). The total length of tube in series determines the transformer voltage and current requirements. Parallel wiring (each tube section powered independently) requires a separate transformer output for each section but allows individual tube failure without affecting others; this is common in large installations where service access is difficult.

The Apple Tax for neon sign making creators: neon content reaches iOS audiences at rates among the highest in the entire craft video category. YouTube glass bending process content (the long-form tube bending, bombarding, and sign assembly tutorials that are the primary subscription driver for technical audiences) reaches 68–78% iOS. Instagram neon art photography and finished sign reveals reach 78–88% iOS — the neon aesthetic (glowing signs against dark backgrounds, the dramatic moment of first ignition) maps perfectly to Instagram’s mobile-first visual format and performs at the high end of craft content engagement. TikTok neon bending and reveal content reaches 80–90% iOS, one of the highest rates measured in the craft category, because TikTok’s algorithm amplifies visually dramatic process content (glowing glass, electrode sparking, the reveal) to a primarily mobile, primarily iOS audience. Starting November 1, 2026, Patreon applies Apple’s 30% iOS billing fee to all subscriptions purchased or renewed through the Patreon iOS app.

Dollar amounts at representative creator revenue levels: at $200/month at 70% iOS: $200 × 0.70 × 0.30 = $42/month ($504/year). At $350/month at 76% iOS: $350 × 0.76 × 0.30 = $79.80/month ($957.60/year). At $500/month at 82% iOS: $500 × 0.82 × 0.30 = $123/month ($1,476/year). At $700/month at 80% iOS: $700 × 0.80 × 0.30 = $168/month ($2,016/year).

The fix: enable Patreon’s web-only billing toggle before October 31, 2026. Patrons who subscribe through a web browser rather than through the Patreon iOS app are not billed through Apple’s payment system, and the 30% Apple fee does not apply. Update all platform bio links — Instagram bio, TikTok link-in-bio, YouTube channel URL field — to the Patreon web URL before the toggle is activated, so that any patron clicking through from a mobile platform lands on the web Patreon page rather than the iOS app. The web-only toggle is available in the creator dashboard to all Patreon creators at no additional cost; enabling it does not force existing iOS subscribers to re-subscribe (they continue at their existing rate through their current iOS billing until they cancel or modify their subscription), but it routes all new subscriptions through web billing, eliminating Apple’s cut on new signups going forward.

FAQ

What determines the color of a neon sign — the gas, the glass, or both?

All three factors interact. The fill gas determines the base emission spectrum: neon produces principal visible lines at 585–703 nm (warm orange-red); pure argon produces lines at 696–764 nm that appear pale lavender in the visible range; argon-mercury discharge produces strong UV (253.7 nm and 184.9 nm from mercury) plus visible mercury lines. Phosphor coatings inside Ar/Hg tubes convert the UV to any desired visible color: BAM BaMgAl₁₀O₁₇:Eu²⁺ at 450 nm for blue; Zn₂SiO₄:Mn at 525 nm for green; Y₂O₃:Eu³⁺ at 611 nm for red. Exterior colored glass further filters the emitted light: neon in ruby glass shifts toward rose-warm red; argon-mercury + blue phosphor in blue exterior glass produces deep saturated blue; clear glass transmits unmodified gas or phosphor emission.

What is electrode bombarding and why does it matter for tube longevity?

Bombarding outgasses the assembled tube at high temperature by applying 5,000–30,000 V across the electrodes while connected to the vacuum manifold at 0.5–1.5 Torr. The discharge heats the glass walls to approximately 100°C (driving off water vapor and CO₂), then heats the electrodes to 600–800°C (visible as cherry-red to orange). At this temperature, the BaO·SrO emission coating undergoes the reduction BaO → Ba + O, converting the oxide to metallic barium, the actual low-work-function electron emitter. Inadequate bombarding leaves BaO partially unreduced; during operation, slow in-situ reduction generates oxygen that attacks the electrode and glass, producing electrode blackening and early failure within 1,000 hours. A properly bombarded tube should sustain 30,000–50,000 operating hours with no electrode blackening.

How do you choose fill gas pressure and what happens if pressure drifts over time?

Neon tubes: 7–12 Torr; lower pressure gives deeper color and easier starting; higher pressure gives more brightness and a lighter, more orange hue. Argon-mercury tubes: 2–6 Torr argon plus 15–30 mg mercury per meter. Higher fill pressure increases starting voltage; lower pressure may not sustain stable discharge. Pressure drift mechanisms: helium contamination (helium’s small atomic radius allows it to permeate through glass walls over months to years in helium-rich environments, unlike neon and argon); getter depletion (the barium coating adsorbs trace reactive impurities over operating life, slowly lowering total pressure). Well-made properly bombarded tubes typically need re-pumping after 30,000–50,000 operating hours; early brightness loss or starting difficulty indicates out-of-spec fill pressure or inadequate getter activation.

How do neon sign transformers limit current, and what is the magnetic shunt?

Gas discharge presents a negative dynamic impedance: current-limiting is essential. NSTs use ferromagnetic shunt plates inserted in the core between primary and secondary windings. At high secondary current, flux diverts through the shunts rather than coupling fully to the secondary, increasing leakage reactance and producing a drooping volt-ampere curve. At short circuit, current is limited to approximately 1.5–2× rated current — safe for indefinite tube failure conditions. Electronic sign transformers (EST) use 40–130 kHz switching inverter topology; more efficient (>90%) and lighter but rely on electronic overcurrent protection rather than inherent magnetic shunting. NEC Article 600 requires GFI protection on all listed NSTs since 2002; test the trip function before installation.

How does the Apple Tax affect neon sign making creator Patreon income starting November 2026?

Neon sign content reaches 68–78% iOS on YouTube, 78–88% on Instagram, and 80–90% on TikTok. At $200/month at 70% iOS: $42/month ($504/year) to Apple. At $350/month at 76% iOS: $79.80/month ($957.60/year). At $500/month at 82% iOS: $123/month ($1,476/year). At $700/month at 80% iOS: $168/month ($2,016/year). Enable Patreon’s web-only billing toggle before October 31, 2026 and update all platform bio links to the Patreon web URL so new patrons subscribe through a browser rather than the iOS app, removing Apple’s 30% cut on new subscriptions.

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