soft JB-4 blocks
Dear Rachael,
It sounds like there is too much of the JB-4
solution B in the embedding medium. Does the manufacturer instructions
give a 25 ml Solution A to 1.25 ml Soltuion B ratio? Also, you
mentioned the blocks being removed from a dessicator. Are the blocks being
stored on dessicant (Drierite) as well? I use the
Polyscience Solution A and Solution B practically everyday and my blocks are
consistantly hard. One thing you may try is to place the polymerized
blocks in a 60 degree oven overnight. Then cool the blocks and place them
in a container (does not have to be a dessicator) with dessicant.
I have forwarded your email to Pamela Marcum at
Polysciences but I am sure Pamela also saw your question.
Good luck,
Cathy
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