> Yes, you are missing something. Frequently, the two parts of an epoxy
> resin system are not the same density, and the ratio that is correct by
> volume is totally incorrect when used by weight. I have also used systems
> that required ratios so lopsidded that weight was the only choice, such as
> 100:1 or 200:1. Here it easy to add 1% by weight to the resin, but if you
> pour this 1% into a container, and then add it to the resin, you will
> leave a lot on the walls of the container.
>
True indeed. But as the question that started all this specifically
addressed West System epoxy, and as the instructions on the West System can
clearly state 5 to 1 by weight or volume, one can safely conclude that the
densities are the same (or very close to it) and use either method.
RVC
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