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Calculate glaze batch weight from unity formula and raw material analysis. Scale recipes to any batch size for consistent studio pottery glazing.
Create kiln firing schedules with ramp rates, hold times, and cone temperatures. Plan bisque and glaze firings for electric and gas pottery kilns.
Calculate clay shrinkage percentage from wet, dry, and fired dimensions. Plan pottery sizes accurately for clay bodies from leather-hard through glaze firing.
Wick size primarily follows container inside diameter. Manufacturer charts (CD, ECO, HTP, wood wick) map diameter ranges to wick numbers increasing with container width.
Start wick = chart lookup (diameter, wax type)Soy needs larger wicks than paraffin for the same diameter due to higher melt point and viscosity. Coconut-soy blends fall between. Beeswax needs smaller wicks.
Soy: size up 1–2 wick numbers vs paraffin at same diameterHigh fragrance load (9%+) and dark dye increase fuel demand — size up one wick. Low load or single-note scents may allow sizing down.
High FO (>9%) or dye: +1 wick size from base recommendationUpdated: July 2026
ECO 10 or CD 12 wick for 3-inch ID soy jar at 8% FO. Test burn 3+ hours — melt pool should reach within 1/4 inch of wall without mushrooming.
4-inch diameter at 10% FO and black dye: start CD 16 or ECO 14. Wood wicks need wider containers — use 0.03 × diameter inch formula for wood width.
Small 2-inch votive: CD 5 or ECO 4 for soy. Votives need shorter wick trim (1/4 inch) and shorter burn tests (2 hours max per session).
Soy wax is more viscous and needs larger wicks. Size up 1–2 numbers from paraffin recommendations or use soy-specific wick manufacturer charts.
Full melt pool evaluation requires 3–4 hour burns (or manufacturer-specified test duration). Early burns mislead — wax memory from tunneling persists through the candle life.
Correct wick sizing determines whether a candle burns cleanly with a full melt pool or tunnels and soots. This calculator recommends wick series and size from container diameter, wax type, fragrance load, and dye content.