Hi all , First off , thanks for your replies to my casting question
, I haven’t cast the shell yet , but your help has given me hope that
it is possible and lots of directions to try ! I have a lapidary
question next , I have been given some stones and equipment for a
local club and with it was a bag of white powder . I assume its a
polish , it has the name Raybrite on the bag . Can anyone tell me
anything about it and how its usually used ? I usually use Tin Oxide
on leather ,can this Raybrite be used the same way ?

Many thanks , Philip Wells , Nelson N.Z

Does it have any additional info like “Raybrite A”? If a white
powder my guess is it’s aluminum oxide and is often used on leather.

K Kelly

Philip - Yes, you can use Raybrite in similar fashion to tin oxide.
Raytech began making their trademarked polishes at least as early as
the 1970s; Raybrite is one of them.

Jim Small
Small Wonders

Philip Yes you can use it about the same as tin oxide. Raybrite is a
trade name for an aluminum oxide product…similar to Linda A/B but
made by Raytech Company. Raybrite also has different grades (A/B/C)
which simply differentiates the micron size of the power. They are
all levitated powders.

While all aluminum oxide powders are essentially the same, many
cutters swear that one is better than the other. Guess you can be
the judge of that. Youn might also try it on felt and
canvas…works great on certain stones but experimentation will tell
you which is best.

Cheers from Don at the Charles Belle Studio in SOFL where simple
elegance IS fine jewelry! @coralnut1

It’s just dawned on me that I forgot to answer this… A few days
back, someone mentioned finding a bag, labeled “Raybrite”, and
wanted to know what it was. In case others haven’t already helped
out, “Raybrite A” (and “B”) are Raytech Industries’ proprietary
names for their levigated alumina (a.k.a. aluminum oxide powder, or
“Linde A”), which is used as a polishing compound in both the
lapidary and optics fields. Please be careful to use a dual canister
respirator when handling this stuff, as it’s likely to be one of the
surest, fastest paths to silicosis, this side of asbestos. If the
bag you have is of the Raybrite “A”, its particles range from
0.3-0.5 microns, while the “B” particles run smaller, about 0.05
microns. Either way, it makes for a true mirror polish on just about
everything between Mohs’ 5 and 9.

Hope I’ve helped!

All the best,
Douglas Turet, GJ
Lapidary Artist, Designer & Goldsmith
Turet Design
P.O. Box 162
Arlington, MA 02476
Tel. (617) 325-5328
eFax (928) 222-0815