QUESTION: We are getting epoxy 353nd from you in a package of 2gr. Is it the minimum package? We are concerned about wasting material because we are using 353nd only for MTP assembly. Do you have any suggestions to reduce waste?
ANSWER:
It is not possible to make a smaller package of 353ND. 353ND has a mix ratio of 10:1. For a 2 gram package the 1 part of hardener has to be measured to +/- 0.01 grams, to maintain this mix ratio. To do better than this is not practical in the repackaging business.
I can suggest to mix the 2 gram packet, use what you need immediately, then as quickly as possible put the rest of the mixed 353 into a syringe that can be used for dispensing later. Freeze the syringe in at least a -20°C freezer (-40°C is preferred, if you have one). Depending on how cold you are able to store the syringe, you will be able to prolong the pot life of the 353 by days, weeks, or months (in the case of -40°C). When you need a little more 353, remove the syringe from the freezer, let warm up briefly, and hopefully dispense another small quantity. You can refreeze and keep using, as long as the 353 doesn’t cure in the syringe.
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