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Boron Nitride

This is part two of a two part series on boron nitride.  Click here to go to the beginning of the series.

1.  Boron nitride can be used on both stainless steel and clay molds.  It performs much better on molds than on the kiln shelf, so is best used for slumping activities only.

2.  Apply boron nitride out doors or in a well ventilated area.  For best results, apply at room temperature to a mold with a clean surface.  Stainless steel molds can be heated, but it's best to apply the product at room temperature onto a mold that has been roughened with sandpaper or sandblast abrasive.

3.  Spraying is better than brushing.  If using the aerosol form of boron nitride, remember that it is under considerable pressure, so spray very carefully. Overspray or spray back is a distinct possibility.

4.  For best results, cure the spray before using it with glass.  Air dry for several hours, then fire to 200F/93C and soak for four hours.  Finally, heat to 1300F/700C to make the finish harder and longer lasting.

5.  After curing, the mold can be used as normal for slumping.  You may see a small amount of residue on the glass after the first few firings, but it can easily be wiped off.

6.  The product will last for quite a few firings before it needs to be reapplied.  If properly cured, it can easily last for dozens of firings.

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Copyright 2005 Brad Walker.  All rights reserved.

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Copyright 2005-2006 by M. Bradley Walker.  All rights reserved.

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