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These two bricks are “1 split” fire or refractory bricks (4.5x9x1.5 in). A good source would be ceramic supply, ceramist who builds own kilns (big volume), large masonry distributor, etc. DO NOT USE regular brick. Here’s why - moisture. House bricks act like a sponge and absorb a bit of moisture out of the air. When you solder you are intensely heating a small area of the brick, too. Water trapped in the brick becomes steam and little bits of brick can pop from the surface. Picture in your mind popcorn popping. Not much fun if you have your face nearby. |
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