Bruton Blue Transparent Raku Brush On Glaze
Description
Our range of Raku glazes are designed to develop beautiful metallic lusters and crackle patterns when fired according to raku firing processes.
This glaze is the correct consistency for brush-on application, where 2-3 coats are required.
Firing Temp: 1000°C
We recommend using a thermal shock-resistant Raku clay body (will help reduce the incidence of cracking).
Made In England.
Working Notes
Raku Firing Tips
Raku glazes should be fired up to 1000°C in either an electric or gas kiln. They should be allowed to cool in the kiln to 750°C. While still red hot they should be transferred as quickly as possible into a reduction bin (typically a metal bin or small metal container with a lid) containing combustables such asd straw, wood chippings or wool.
As soon as the pieces are in the bin the lid should be put on to keep oxygen from entering the container, in order to develop the reduction atmosphere. The pieces should be allowed to cool in the bin for at least 20 minutes.
When the red hot pieces go into the bin, the organic material ignites producing flames and smoke so this part of the firing should be done outside.
Firing tips:
- Try to size the reduction bin to the size of the piece being fired.
- Position the organic material and the piece so that the flames can get all around the piece.
- Different organic materials can produce very different results, so for example a glaze reduced in newspaper could be a beautiful blue color and the same glaze reduced in sawdust could have a metallic copper appearance.
- Pieces should be cleaned immediately with water and a hard bristle brush.
- After cleaning, warm the pieces in the kiln to evaporate any water from the piece. This helps to set the colors more permanently.
Health & Safety
Proper safety processes and personal protective equipment are very important when doing Raku as you are exposed to high heat, flames and smoke. Always wear heat and fire protective clothing and fireproof gloves. Do not open or insert tongs into an electric kiln without shutting off. Reduction process should take place outside of building due to flames and smoke.
Manufacturers Recommendations: Not Suitable for Dinnerware due to Surface Durability indicates the fired glaze surface may not be desirable to use a particular glaze for dinnerware even though it has passed the food safe testing process. Much of this is due to the fired glaze surface being impacted by contact with acidic food or liquids. Please note, dinnerware safety is not defined by cutlery scratches. To be certain, you will need to submit your wares for testing at a reputable laboratory.
Lucideon: https://www.lucideon.com/testing-characterization/ceramic-testing-analysis
Northern Testhouse: https://www.nthleicester.co.uk/service/homewares
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