How it works
The workflow, examples and limits behind every tool.
Shrinkage planner ↗
Fired size = wet size × (1 − shrinkage / 100). Reverse planning divides by the same factor.
Example: A 100 mm fired target with 12% shrinkage needs about 113.636 mm wet.
Assumes uniform linear shrinkage. Warping, anisotropy, firing variation and glaze behavior are not predicted.
Test bar ↗
Total shrinkage = (wet − fired) / wet × 100. Firing-only shrinkage uses dry length as its denominator.
Example: 100 mm wet, 95 mm dry and 88 mm fired gives 5% drying and 12% total shrinkage.
Use the same marked span at each stage. Expansion is reported as a negative shrinkage value.
Slab material ↗
Volume in cm³ = length × width × thickness in mm / 1,000. Mass = volume × density × (1 + extra / 100).
Example: 200 × 150 × 6 mm is 180 cm³; at 1.8 g/cm³ it is 324 g before extra material.
Density is an entered estimate, not a universal clay constant. This does not estimate kiln energy or firing safety.
Studio notes ↗
Each entry stores a title, clay name and plain-text observations. Backups retain calculator settings and entries.
Example: Save “White mug / Test 03 / 12% total shrinkage” alongside your own observations.
Up to 100 notes. No firing schedules or material certifications are supplied.
Local work, explicit limits
Each workspace reports its input and file limits. Imports validate the supported format before asking to replace saved work. Plain text is displayed as text, never executed as markup. Both languages use the same tools; the root address always opens in English, with Chinese under /zh/.