Sources for High Quality Ground Glass

[Denis Pleic]

Ian, can you give a us a note on your technique? Are you using loose grit, or sandpaper?

Tim, Ian's article can be found here:
http://www.apug.org/forums/forum216/...us-screen.html

[IanG]

Thanks Denis, I re-jigged the article slightly for the Lomography magazine.

Tim in Thailand there should be no problem getting powder grits, wet & dry doesn't really work but is excellent for smothing edges.

Ian

[Tim Meisburger]

Okay. Thanks Denis and Ian. I'll see if I can find grit here (the problem is searching in Thai script). I have the worst screen I've ever seen on my old B&J 5x7 and would like to replace it.

[IanG]

See if you can find someone who polishes gemstones, they should be able to give you some or tell you where to get it.

Ian

[Tim Meisburger]

Right. There is a large jewelry industry here so that could work. I'll check.

[jose angel]

Interesting to consider the grain size. What would you consider being the best grain size? Is it harder to focus if the grain size becomes to fine?

I have been out for a while, I see others have responded to your question. I use the pure powder in jet machines, I have never made a GG with them, so I`m afraid I cannot help you.

About acrylic materials; don`t know if the GG I have used were made in acrylic or polycarbonate, anyway; I work with acrylics, and I`d never advice to buy a GG made of it. There are different acrylics, the high quality ones we use are still sensitive to temperature (in fact, it`s our main problem)... In short; for a GG, if you can buy glass, just buy glass.

As mentioned above, any jewelery manufacturing materials supplier should have pure aluminum oxide powder (=corundum). It`s also quite common between dental manufacturing suppliers. Any good chemical product supplier should have it, too.

Ian`s article explains it all. He use silicon carbide powder (=carborundum).