<br><font size=2 face="sans-serif">Originally this just went to Brian...did not realize that till now....All those pump/mix by volume applications are applicable to what I wrote below.</font>
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<br><font size=2 face="sans-serif">Brian</font>
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<br><font size=2 face="sans-serif">Mixing by weight is always superior. The stuff you are using has a hardener in it called polyamide. Polyamide allows for very forgiving mix ratio upwards of 20%. Polyamide also imparts excellent adhesive qualities to the epoxy. The down side is the high viscosity-not a problem for adhesives but is for laminating. Most off the self laminating resin formulations contain some amount of polyamide in the hardener to allow for mix ratio errors. Once again the downside is the increase in viscosity, which makes the laminating resin more difficult to work with. </font>
<br><font size=2 face="sans-serif">I do not use these type hardeners on Aeroslave planes due to the intricate nature of the laminate-core structure and my ability as chemist not to make mixing mistakes. We could never make our planes using an off the shelf epoxy such that you have, due to the viscosity problem.<br>
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Gray Fowler<br>
Principal Chemical Engineer<br>
Composites Engineering</font>