: That's what I think I said or at least meant - The weight ratios
: are also usually given on the bottle. I use West Systems and
: they give
: To measure 105 Resin and 205 or 206 Hardener - by weight or volume
: -, combine five parts resin with one part hardener.
: To measure 105 Resin and 207 or 209 Hardener - by volume, combine
: three parts resin with one part hardener
: - by weight, 3.5 parts resin-1 part hardener - I usually then make
: it seven to 2 and multiples of that for ease of operation. (I
: know the 7x table :-)
: The 2 plastic cups method isn't as accurate as weighing and I find
: it slower. I use a sauce (ketchup) bottle to dispense the resin
: and hardener - something I learned here.
: The weighing method I also learned here, but it was on a balance
: beam. My wife's electronic kitchen scales seemed more efficient.
: Cheers
: JohnK

I do the same but bought an electronic scale for my self. Maximum weight 5 kg with a resolution of 1 gram.
You can make big mistakes when you have to much time between epoxy and harder measurement. Those electronic scales
tend to switch themselves off when you wait to long. (And that is not very long, shorter then 4 minutes) So I always write down how much I poured in. Or you have to remember the tarra weight of the mixing pan.

Daan Daniels