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Everything posted by IainB
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Seriously though they need something like sodium polyacrylate (the modern day sawdust) to soak up the water and then grade it off. "Sodium polyacrylate powder, also known as waterlock, is a super-absorbent polymer that can absorb and retain 100 to 1,000 times its mass in water. Upon contact with liquid, it rapidly swells to form a clear, solid hydrogel"