Patreon for lost wax casting creators — 2026 edition

Investment burnout chemistry, centrifugal vs vacuum casting mechanics, sprue tree design, alloy liquidus temperatures, and the Apple Tax.

Lost wax casting Patreons retain when they deliver the process physics and failure-analysis layer that pour videos and finished-piece reveals compress away — the investment chemistry, burnout ramp schedules, sprue tree porosity logic, and the alloy temperature arithmetic that separates a complete fill from a cold-shut or misrun.

Who creates lost wax casting content on Patreon

Jewelry casters document the complete bench-to-flask workflow: wax carving tooling selection (flexible shaft with flame tip for wax fusion, wax pen setpoint for different carving waxes), injection wax type selection (purple hard injection for production molds vs green soft carving wax for one-off models vs blue medium for repair work), sprue attachment point decisions by model geometry, investment mixing ratio (typically 40 parts water to 100 parts investment powder by weight for Kerr Satin Cast 20 or R&R Ultra-Vest), vacuum investment under 28 inHg for 90 seconds to remove air bubbles before setting.

Metal sculpture artists share the larger-scale workflow: silicone mold making for complex originals, resin or wax injection into molds, sprue tree assembly for production batch casting, burnout kiln ramp schedules (typically: room temperature → 300°F/1 hr → 700°F/1 hr → 1350°F/3–4 hr hold → cast temperature hold), centrifugal casting setup and spring winding tension, and post-casting finishing from raw cast through filing, sanding, buffing to polish.

Metalsmithing educators cover the material science: why gypsum-bonded investment (Kerr, R&R) is limited to 1300°F maximum flask temperature before the calcium sulfate decomposes and contaminates the casting with sulfur (causing porosity and embrittlement in silver), while phosphate-bonded investment (Plasticast, Ultra-Vest Maxx) tolerates 1600–1700°F for platinum, palladium, and high-temperature alloys. Why investment expansion (thermal and setting expansion) must match alloy shrinkage during solidification (pure silver shrinks ~6% volumetrically from liquid to solid; 14K gold ~4.5%; bronze ~7%) — if investment is too rigid it cracks under shrinkage stress, if too flexible the casting is oversized.

Tier structure that retains patrons

Lost wax casting Patreon tiers convert when they solve the black-box problem: casting fails without explanation and beginners cannot diagnose why. A creator who publishes failure analysis — porosity causes (gas porosity vs shrinkage porosity, how to distinguish by location and morphology), misrun causes (too-cold flask, insufficient pressure, thin section gating error), and surface roughness causes (contaminated investment, incorrect water ratio, flask flask not vented) — is giving patrons a diagnostic reference library worth the subscription.

• Wax Model ($5–8/mo): wax pattern STL files optimized for castable resin printing; burnout ramp schedule library for major investment brands; monthly carving wax selection guide by application.
• Flask ($15–18/mo): everything above plus monthly sprue tree design breakdowns with gate diameter reasoning; investment mixing ratio guide; alloy casting temperature and flask temperature tables for silver, 10/14/18K gold, fine silver, bronze, brass.
• Foundry ($30–35/mo): full access plus quarterly failure analysis posts with photographic evidence; resin printing settings for Formlabs Castable Wax, SprintRay Castable, Elegoo ABS-Like for burnout; one-on-one casting diagnosis for patrons experiencing consistent defects.

Casting process physics

The burnout kiln cycle removes all organic material (wax, resin, sprues) from the invested flask before metal is poured. The critical hold at 1350°F (730°C) burns out residual carbon — incomplete carbon burnout leaves carbon contamination that causes gas porosity in the casting. Visual check: a properly burned-out flask shows no dark carbon spots in the sprue channel when viewed under a flashlight; a contaminated flask shows dark matte areas that must be re-burned before casting.

Centrifugal casting uses a wound spring to spin the flask rapidly (600–1800 RPM) as metal is poured — centrifugal force drives molten metal into thin detail sections that gravity alone cannot fill. The force at the flask rim: F = mω²r, where ω is angular velocity in rad/s. A typical arm radius of 12 cm at 1200 RPM (125.7 rad/s): F/m = 125.7² × 0.12 = 1,897 g — about 1,897× gravity at the rim. This pressure overcomes surface tension and ensures complete fill of fine prong tips and thin filigree. Vacuum casting (tabletop vacuum casting machine with vacuum chamber under the flask) applies atmospheric pressure from above — typically 0.5–1.0 bar differential, far less force than centrifugal but adequate for most jewelry geometries and easier for beginners (no arm winding, no rotation).

Sprue design: the main sprue diameter must be larger than the heaviest section of the model (typically 3–5 mm for small jewelry, 6–10 mm for medium castings) so the sprue solidifies last and feeds metal into the model as it shrinks. If the model solidifies before the sprue, a central shrinkage void forms in the thickest section of the casting — a porosity defect indistinguishable from the outside but catastrophically weak. Gates (secondary sprues from the main sprue to the model) should enter at the thickest point of the model and taper toward the thin sections, not the reverse.

The Apple Tax on lost wax casting creator income

Jewelry making and metal casting YouTube runs 72–86% iOS viewership; Instagram goldsmithing and silversmithing content 78–90% iOS. At $300/month with 76% iOS: Apple’s 30% fee starting November 1, 2026 costs $68.40/month ($820.80/year). At $500/month with 80% iOS: $120/month ($1,440/year). Enable web-only billing in Patreon Creator Settings before October 31, 2026.