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RW> I've been using the Jeffco with a 25:100 by weight mixture.  I can do that
RW> math in my head (let's see ... 40 grams of resin means 10 grams of
RW> hardener...)  The Shell-TETA system was harder with an 18.5 to 100 ratio (or
RW> something like that) -- I had to have a calculator by the scale.  Same goes
RW> for Hysol with it's oddball mixture ratio.

I printed out a chart giving the correct hardener and total weight for
different weights of resin, in 5 gram increments. Taped it on the wall
over the scale. No sticky calculator this way, simply tare the empty
cup, pour any even amount of resin, and top off with hardener to the
correct weight.

David


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