Can the block be reused?
No, for reliable test results the block should be discarded after each use. Animal tissue is comprised of proteins. The protein amino acids form long chains, much like netting. This is what gives the muscle strength, in the same way ballistic gelatin has the same amino acid chains present. While invisible in solution they are present in very high numbers and extremely strong. This is what makes professional strength ballistic gelatin so much like the real thing. When heated, these chains are broken and diminish in size and strength. While it will reform a gel that may look exactly the same, it in fact is MUCH weaker in its ability to resist. This is why ballistic gelatin should never be reused.
