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I have been mixing Etex by weight for many years with no problems. To get the weight ratio I weighed the resin and hardener right out of the box, and assuming the containers weighed the same,established the weight ratio was 0.87 gm of hardener to 1.00 gm of resin . So for 2gm resin,add 1.74gm hardener,for 3gm resin add 2.60gm hardener....and so on. I use a triple beam balance to make the measurements but the scale you use to weigh your plugs will probably suffice. Most important in using Etex is to adhere to the recommended humidity and temperature conditions.and to mix well, vigorously, for at least two minutes.
Note:don't mix more than 6gm of resin or the mix will start to stiffen before you finish ( about six large plugs in my case).
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