Epoxy...favorite mixing cups?

[tylerzx9r]

You guys that are weighing the epoxy, great idea because it's more accurate, need to know... That only works if you know the mass comparison to the formula. Example a 1:1 formula would require each epoxy to weigh the same mass 20g to 20g. If one weighs less, your not truly getting a true mix.

 

[Mikeq]

You guys that are weighing the epoxy, great idea because it's more accurate, need to know... That only works if you know the mass comparison to the formula. Example a 1:1 formula would require each epoxy to weigh the same mass 20g to 20g. If one weighs less, your not truly getting a true mix.

+1...volume and weight may not coincide...

 

[Alky6]

You guys that are weighing the epoxy, great idea because it's more accurate, need to know... That only works if you know the mass comparison to the formula. Example a 1:1 formula would require each epoxy to weigh the same mass 20g to 20g. If one weighs less, your not truly getting a true mix.

You are absolutely correct. Close enough for the 5-30 minute epoxies, IMHO. With BSI, there is about an 8% difference in density. Epoxy being the heavier. Easy to compensate, but I don't think I could mix by volume in small batches to be any closer. 1:1 on volume, add 10% to the hardener to compensate by weight.

Correction: add 10% to the epoxy by weight. Not as noted above. If you are so inclined.

 

[stangflyer]

Very old school for me. No measuring devices. No cups. No incremental lines for correct mixtures. I have been relying on good ole' judgement. I have my very special epoxy board. Been using the same board for over two years now. Very easy to see the correct size of both amounts of hardener and epoxy. I get too apprehensive when mixing in a small cup. "Crap, did I put enough hardener?"

 

[wesley.]

T-88 is 1:1 by volume and 100:83 by weight

 

[Mikeq]

Very old school for me. No measuring devices. No cups. No incremental lines for correct mixtures. I have been relying on good ole' judgement. I have my very special epoxy board. Been using the same board for over two years now. Very easy to see the correct size of both amounts of hardener and epoxy. I get too apprehensive when mixing in a small cup. "Crap, did I put enough hardener?"

Damn right Rob...we don't need a measuring cup or scales....we know when to add and when to stop.... it's right every time.

 

[Bartman]

T-88 is 1:1 by volume and 100:83 by weight

hmm, i messed that up, didn't i. i haven't used t-88 in a while but i was using a triple beam balance scale at the time.....that's what's nice about West System actually, the pumps meter it out in perfect quantities but it's expensive and you waste a lot when working on small parts.
most small 5 or 30 min batches i do by eye.
now i'm thinking how i used to mix t-88 when i was using it. i know i had the scale but maybe i did it by the weight ratio you quoted??

 

[stangflyer]

Damn right Rob...we don't need a measuring cup or scales....we know when to add and when to stop.... it's right every time.

Damn skippy...... LOL

 

[Patroller]

I find the scale most helpful with really small batches that are all to common with RC projects. Like 2 or 3 grams.

 

[thepamster]

I use those epoxy cups mostly for mixing oil with my gas. Measure the correct amount of oil for my gas then chuck it. I only use those cups for epoxy when I need a lot for slow cure and always seem to mix too much.
Most of the time I mix epoxy on a blank piece of paper and use kabob skewers for mixing sticks.