Carve or Build Wax Model
1 dayCalculate casting weight with sprue allowance.
Advanced1-2 months
Lost Wax Casting Guide
Complete guide for lost wax casting — step-by-step workflow, tools, checklist, and expert tips to get started.
castersproduction jewelerssculptors
Workflow
Invest Flask and Burnout
4 hoursMix investment at correct powder-to-water ratio.
Melt and Cast Metal
2 hoursCalculate metal weight with 20% button allowance.
Clean Casting and Finish
2 hoursRemove sprue and finish surfaces.
Tools Used
Checklist
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Planning
Prep
Baseline
Quality
Tracking
Reference Materials
Casting Weight AllowanceTable
Metal needed.
| Component | Allowance | Notes |
|---|---|---|
| Wax model | × density factor | From calculator |
| Sprue/button | +20% | Minimum |
| Loss | +5–10% | File/polish |
Investment RatioFormula
Follow manufacturer powder:water — typically 2.5:1 by weight.
Molten metal causes severe burns — full PPE required.Standard
Cast in ventilated area — burnout fumes are toxic.
Measure Twice
Verify all calculator inputs against physical measurements before cutting or mixing.
Quality Check
Compare results to known good references in lost before final assembly.
Stop If Unsafe
Pause immediately if tools malfunction, ventilation fails, or materials react unexpectedly.
Safety Notes
- Follow manufacturer safety data sheets for all chemicals and finishes.
- Work in ventilated area and wear appropriate PPE for the task.