I've always kind of wondered how much room for error there is in terms of the A:B ratio when mixing Alumilite clear, so I've spent the last few hours performing an experiment.
I mixed approximately 40 gram batches of (probably near end-of-life)Alumilite Clear and varied the A side to B side ratios. At somewhere around 52 to 54 percent A side, the cured resin was turning white. Weighing was done with a digital kitchen scale set to weigh in grams.
I put a plastic cup on the scale, set the readout to zero and poured 20 or so grams of A side into the cup and recorded the weight of A. I then reset the zero and poured B side in varying amounts, also recording the amount.
At A:B=20g:19g the result was clear. This is about 51% A.
At A:B=20g:17g there were patches of white. This is about 54% A
At 57% A the cured resin was completely white.
These are pretty rough numbers given the 1 gram resolution of the scale. Next time I'll use a reloading scale with a .1 grain (about .006 gram) resolution.
Just for what it's worth.
The only suggestion that I would make is to use just one cup for weighing and mixing. That way you never have any residue left behind when you pour one part into the other.
Hope this helps,
Bill