Zero3 K Transparent Glaze


This glaze was originally designed to work with the Zero3 engobe, stoneware and porcelain (fired at cone 03). It also works well on L212, L215. It is exceptionally glossy and transparent (when fired according to our instructions) and it is durable and fits very well. No common middle or high temperature glaze can compare if you are doing underglaze decoration, the brightness and clarity of color are stunning!

Process Properties

Screening: We have not ball milled this product, thus it may contain some oversize particles from the constituent materials. We advise that sieving the glaze slurry to at least 80 mesh.


To get the best defect-free surface please consider using a hold-rise-drop-hold firing schedule (you can find more information about it on this page).


As of June 2017 it is not yet available as a premixed product. But you can mix to yourself. For our lab information on the recipe, how to mix and use it click here.


Zero3 Porcelain mug fired at cone 03 in 3 hours. Notice how ultra-clear the Zero3 K glaze is over the underglazed areas. No micro-bubbles. It is applied in a very thin layer. By Tony Hansen.

Zero3 Stoneware mugs decorated with underglazes and finished with G2931K ultra clear glaze. By Tony Hansen.

L215 with underglaze decoration and G2931K clear glaze. Fired at cone 03 in 3 hours cold-to-cold.

L212 underglaze decorated mug with clear G2931K clear glaze. Fired at cone 03 in three hours cold-to-cold.

Safety Data Sheet

Click here for web view.

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702 Wood Street, Medicine Hat, Alberta T1A 1E9
Phone: 403-527-8535 FAX:403-527-7508