I would assume
it's because at least one part is not totally
homogeneous and may partially separate in storage. If you take, say,
half of the contents of the container you might not be getting half
of everything.
That makes sense as one possible reason. I'd prefer not to have to
assume, though.
Well, apart from that, and the 'business' reason (that they sell more
kits if you waste most of them), can you think of any other reasons?
I've worked with a number of 2-part molding and casting supplies, mostly
urethanes and variations on RTV rubber, and they're often sensitive to
oxygen and/or atmospheric moisture: once you open the factory seal, they
Good suggestion. I don't recall there being anything in the instructions
about this, though, and there were no seals on the contains (obviously
there were lids with rubber washers, but nothing about not removing them
before you mix the stuff).
Incidentally, do you have any experience of the 2-pack 'synthetic
rubbers' that Devcon (and others) make? I may well need to use such a
product to make a roller (for a classic computer -- an HP9820's internal
printer), and I do need to mix small amounts. The smallest Devxon pack I
can get over here is something like 500g, and costs \pounds 30.00. I am
going to go broke very quickly if I have to pay that out for every test
run (I know it won''t work first time).
-tony
