Supplied in a simple bag, this 1kg of Bullseye Shelf Primer is ideal for those who dont feel the need for the full 2.25kg standard bucket.
Hot glass will stick to most ceramic or metal surfaces and crack as it cools, unless prevented by a separator like Bullseye shelf primer. Careful application of this primer to shelves and moulds will result in smooth, effective firing surfaces.
Mix 1 part shelf primer powder to 5 parts (by volume) of water. Apply five coats of primer, in a cross-hatched fashion. A Chinese haik brush (product 950.207) is ideal for this purpose. Ensure you stir the mix frequently during application to stop the powder settling. Dry the shelf/mould in your kiln at approx. 260ᵒC (500ᵒF) for 20 minutes. Then allow to cool to room temperature before use.
Frequency of cleaning and re-application will depend upon firing temperature. Firing at lower temperatures will enable you to reuse the shelf/mould several times provided the primer is not scratched. When necessary, remove old primer and re-coat as before.
Store shelf primer powder in a tightly closed container in a cool, dry place. Primer that is mixed with water will last for several weeks, if kept covered.
Avoid breathing shelf primer dust; wear a respirator such as 980.352.