Trying to remove baked on kiln wash from
the underside of a glass piece can be
one of the most frustrating experiences for the warm glass
artist. In the worst cases, it doesn't respond to elbow
grease, it requires nasty chemicals, and it leaves an ugly stain behind.
But there's no need to despair, there are several ways
to remove the baked on primer. Part one of this two-part
tip deals with less aggressive, relatively simple and safe,
methods of attacking the baked on kiln wash beast.
1. Vinegar. Soaking the glass
in distilled white vinegar (a mild acid) for two to three hours
will often help the kiln wash come off with a minimum of
2. Acid Etch or a similar etching
product -- although this will leave a matte finish (not
unattractive, by the way), a simple soak for ten to fifteen
minutes will usually remove the kiln wash completely.
3. Old fashioned elbow grease -- either
after soaking in water or vinegar, or just by itself. A good scrub with
wet/dry sandpaper, Fabricut (open weave sand paper), or a
can work well.
Still struggling? Click here for part two of this tip,
which centers on more aggressive ways to remove backed on kiln
wash from glass.
Copyright 2005 Brad Walker. All rights
Most of these tips came from
posters on the Warm Glass bulletin board.