Kiln Firing Log
Give every firing a number and a record, so a good result can be repeated and a bad one explained instead of guessed at.
SD-17 2 pages
Studio crafts and making · SD-11
Glaze Recipe and Test Tile Record
A free printable glaze test record sheet — the recipe as weighed, the batch mixed, and one line per test tile with clay body, firing, application and result.
Download Free · no sign-up
2 pages. Choose your paper size — both versions are laid out identically, so neither one gets shrunk to fit.
Print it and write on it
Fill it in type and save
The fillable versions have real form fields — open them in any PDF reader, type into them and save. Printing help.
What this sheet is for
Trace the tile you like back to exactly what went into the bucket and which firing it went through, so it can be mixed and fired again on purpose.
Who it is for
Potters and ceramicists mixing their own glazes, and studios that share buckets and need to know what is in them.
How to use it
- Give the glaze a name or code and note where the base recipe came from.
- Write the recipe as you actually weighed it, with supplier and lot for each material, then the water and sieve used for the batch.
- Log every test tile on its own line, quoting the firing number from your kiln log and the clay body it was on.
- Describe the result in words — colour, surface, fit, crawl, run — and tick the tiles worth keeping.
- Start a fresh sheet for each variation rather than crossing out the last one.
What is on the sheet
2 pages, in this order:
Page 1
Printed under the title: One glaze on one sheet — the recipe as weighed out, the batch it was mixed from, and every test tile fired from it.
Your recipe, your firing. Percentages, additions and the cone or temperature a tile was fired to are yours to write in — none are printed. Quote each tile's firing number from your kiln log.
Write-on lines: Glaze name / code · Base recipe from · Fired to (your cone or programme)
Recipe as weighed — base materials first, colourants and additions below the line
Table, 12 rows: Material · Parts / % · Batch weight · Supplier & lot · Notes
Write-on lines: Batch mixed on · Water added / SG · Sieve mesh · Bucket / label
Page 2
Test tiles — one line per tile, with the firing it went through
Table, 22 rows: Tile no. · Clay body · Firing ref · Application · Over / under · Result · Keep?
Questions
Why are there no percentages or cones printed on the sheet?
Because a glaze recipe is only a set of proportions until it meets your clay, your kiln and your firing, and the same numbers give different results in different studios. Every figure on the sheet is a blank for yours; the sheet gives the figures a place, not a value.
What goes in the firing reference column?
The number of the firing from your Kiln Firing Log. That is what turns a tile into evidence — without the firing it went through, a good tile cannot be repeated and a bad one cannot be explained.
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