Cheers:
Now that the topic has come up, my solution was to forebear levers
and dirty cups by acquiring a 400gm electronic scale whose accuracy was
to the nearest 0.1GM. I printed a computor sheet giving common ratios
(Aeropoxy I'm using is 27gm/100gm hardener/resin ratios) for easy
measuring. This way, at 100gm totals, I measure to within 0.1gm, giving
an accuracy of 1/10 %. In most cases, I use small batches (dry micro and
flox preparations) in 35mm photo containers or 50-70gm amounts in
intermediate bulkfood contianers and save the Europa sizes for large
areas like wing covers, etc.
With my childbride hovering over the scale and producing batches for
a buddy and self during the big layups, I have never experienced an
error over 0.2 percent ratio, so am confident of good mixes. The little
batches give me small samples of epoxy from each layup for the inspector
or (heaven forbid) forensic engineering. I am careful about using
previous bulk food containers because of possible fat/oil contamination
and use only new.
I bought sveral sets of water containers such as used by trekkers
and joggers etc. These incorporate snap-on covers to the pouring spouts
and secondary (+/- 3/32") vacuum relief holes. I keep them bottles full
by topping up from originasl containers, snap the pouring holes closed
and fill the airholes with horse-size plastic hypodermics for accurate
dispensing. All go into a lighttight cupboard for storage between
rampages.
I spoke to "George" at the labs at Aeropoxy regarding deterioration
of the combinants and was assured that little or no effect up to five
years of storage, provided hardener is not exposed to fresh air. Colour
makes no odds, either (my hardener is darkening even in the sealed
containers shipped by Aeropoxy).
Anyway, thass my method.........
Happy Landings
Ferg (#A064)
|