Pottery Materials Planner
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Pottery materials planner by Envelo SlipScale: the size to make each piece with your clay’s shrinkage, the clay and bags to buy, a glaze batch weighed out from its recipe, what you are short of – and a true-size shrinkage ruler to print.
How big do I throw a mug that should be 9 cm after the kiln? How much clay for the whole set, and how many grams of each material for a 1 kg glaze batch? SlipScale answers from your own clay and your own recipe.
Try it here
A live demo with a made-up example. Nothing you type here is saved or sent anywhere.
What it does
What you can do
- Type your clay body, its shrinkage (from the bag or a test bar), the bag size and the bags you have
- Add your pieces: the size you want after the firing, the clay for one and how many – SlipScale gives the size to make and the clay for each row
- See the clay you need with your extra for trimming and reclaim, the bags to buy and the clay left over
- Copy a glaze recipe in percent: the grams of each material for any batch size, additions on top of the 100 % base, the dry total and the water
- See the clay and glaze materials you are short of in one list, and save it as a CSV table
- Print a shrinkage ruler at true size: 180 × 120 mm, true centimetres on one edge and fired centimetres on the other, with your pieces and glaze card – download as SVG or print at 100 % on A4 or US Letter
- Grams, kilograms and centimetres or ounces, pounds and inches; backup and restore
Example inside
A made-up table set from a buff stoneware with 12 % shrinkage: six mugs, four bowls, two plates and a vase – a 24 cm plate is made at 27.3 cm. 9.4 kg of clay, 10.81 kg with 15 % extra: two 10 kg bags, one to buy. A made-up satin glaze: a 1000 g batch weighs out to 1100 g dry with the additions and 990 g of water; three materials to buy.
How it works
- Download the ZIP and START-HERE.pdf from Etsy after checkout.
- Unzip and open Envelo-SlipScale.html in your web browser. Look at the filled example, then press My numbers.
- Type your clay, your pieces and your glaze recipe. Everything updates as you type and saves in your browser.
What you receive
- START-HERE.pdf (0.12 MB)
- Envelo-SlipScale-v1.0.zip (1.60 MB)
Inside the ZIP:
- Envelo-SlipScale.html: the app, opens in your browser by double click and works offline, 11 languages, grams and cm or ounces and inches
- examples/: the filled example as a backup file, its shrinkage ruler and glaze card as SVG (180 × 120 mm) and its pieces and recipe as CSV
- START-HERE/: the guide in 11 languages
- LICENSES.txt and WHAT_YOU_GET.txt
Good to know
- This is a digital download. Nothing is shipped.
- No subscription and no account. The app runs on your device and uploads nothing.
- No glaze recipes are included – the example recipe is made up and not tested. SlipScale works with the recipes you have.
- SlipScale does not check whether a glaze is food safe. Test every glaze on a tile, and measure the shrinkage of your own clay with a test bar.
- Your numbers do not sync between devices; move them with the backup file.
- For your own use. Please don't resell or share the files.
- The app, its logo, the texts and the translations were made as code with the help of an AI coding assistant. No AI image generators were used.
A closer look
Buy it on Etsy and download the files straight away.