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James Detenbeck wrote:
> All of the batches I have mixed seem to harden, but what test is there to
> determine the actual strength, or more appropriately, the "correct" strength
> of the hardened resin?

If you want to test the hardness of most installed
layups you can use a Barker Coleman (Barcol)
hardness tester.  They are not cheap, around $400,
but what is in this game.  It needs about 8" of
space above the layup so it can't be used
everywhere.

John Herminghaus
I-VVVV