On Wed, 21 Feb 2007 07:52:14 -0800, in rec.crafts.jewelry Abrasha
wrote:


On separating discs?!? That's like using sand paper with a lubricant. I
always use separating discs without a lubricant.

And what's wrong with coolants and lubricants with sandpaper? Wet/dry paper,
for example, is specifically made for that, and in industry, many instances of
grinding operations are done with lubricants of one sort or other. Those nice
3M sanding films last longer and cut quicker without loading up with a bit of
water to help, even if they don't actually need it to work for example. The
function is not just to cool, but to help carry away the dust. In the case of
seperating disks, the work doesn't get as hot, and especially with the fragile
very thin ones, you'll break a lot less of them. And they seem to cut a bit
faster too. Obviously, not all abrasives need or work with coolants or lubes,
but many of them require it. Use your diamond abrasives for a lot of work
without coolants/lubes, and you'll be replacing them a lot more often, for
example... Try it. You might find, to your surprise, that you like it. Even
traditional woodworking sandpaper sometimes gets used with a bit of water
(raises the grain, needed for some uses, or with some types of sanding in
between coats of some finishes...

And yeah, the zip lock seems like a slightly leaky shipment method. But my
ziplock seemed to have fared better. Pretty flattened, but still a pretty good
shmear of the yellow/brown goo to try. See if you can salvage enough from
your zip lock to try it once or twice. I'll bet there's enough to drill a
couple holes, at least...

Peter