Firing tips when using Lustres
A Mother-of-Pearl Overglaze may provide iridescent beauty and/or a classic lustre to enhance your piece. Mother of Pearl is a translucent overglaze that can be easily applied. Its appearance will vary with the type of glaze over which it is applied: over a gloss glaze it will add a shiny lustre; when applied over a matte glaze, it will add a subtle sheen.
Use over fired white or coloured pottery. This is a low-fire "finishing" glaze.
Overglaze Information Guide
How to use Precious Metal Overglaze - Duncan Guidance
How to use Mother of Pearl Overglaze - Duncan Guidance
Application of Gold and Silver Lustre - CLC Guidance
Application of Mother of Pearl Lustre - CLC Guidance
Overglazes can be used on surfaces that come into contact with food and drink. Care must be taken to avoid hard scrubbing when washing overglazed ware, because of the possibility of scraping off the thin layer of metal or lustre. Treat your overglazed pieces as you would bone china. Although overglazed ware will take repeated washings in a dishwasher, the overglaze will eventually wear away. Note: Ware decorated with metallic overglazes should not be used in microwave ovens.
Orton Ceramics have produced a PDF document detailing how to fire Lustres CLICK HERE to open.