Kiln Shelves for Large Kilns
Since the largest
mullite kiln shelves commonly available are approximately 2
feet by 2 feet (61cm by 61cm), larger kilns are often outfitted
with several kiln shelves, rather than one large shelf.
This arrangement works well when fusing smaller items, but the
seams between the shelves make it difficult (if not impossible)
to successfully and cleanly fuse items that are larger than the
individual kiln shelves. As a result, a number of
different solutions to the large kiln shelf problem have been
attempted. Here's a list of possibilities:
Hiding the seams:
Fiber paper over the shelves
Refractory paste to fill in seams
Refractory scraps to cover seams
(and add texture)
Alternative shelf materials:
Fiber board, vermiculite board,
similar products in stock sizes (typically 2 feet by 3
feet/61cm by 91 cm)
Custom sizes of fiber board and
Rigidized fiber blanket
Moldable papers and boards (i.e.,
Zircar's RS100 board)
As you would expect, some of these
alternatives work fairly well, while others come with a
different set of problems.
Click here to go to the next part of this
series, which deals with solutions that hide the seams between
kiln shelves in the larger kiln.
Copyright 2006 Brad Walker. All rights
Most of these tips came from
posters on the Warm Glass bulletin board.