Post by thomtap on May 14, 2008 19:43:32 GMT -5
Besides being a rock nut... I am also a telescope making nut. I have ground several pyrex and plate glass telescope mirrors using much the same technique we use to tumble stones.
My last batch looked good, but the soft stones I did before that didn't do too well. The shine just wasn't there. (Using a vibe tumbler.)
Today, I finished the 220 carborundum grit, and decided to use some of my telescope making stuff. Instead of going straight to the 600 grit pre-polish, I used 305 mesh emory powder. The mohs scale on it says it is about 7-9. Do you think it will help putting that between the 220 cycle and the 600 prepolish cycle?
In making mirrors, there are many more stages of grinding than the three I use now for tumbling in the RayTech vibrating tumbler.
My last batch looked good, but the soft stones I did before that didn't do too well. The shine just wasn't there. (Using a vibe tumbler.)
Today, I finished the 220 carborundum grit, and decided to use some of my telescope making stuff. Instead of going straight to the 600 grit pre-polish, I used 305 mesh emory powder. The mohs scale on it says it is about 7-9. Do you think it will help putting that between the 220 cycle and the 600 prepolish cycle?
In making mirrors, there are many more stages of grinding than the three I use now for tumbling in the RayTech vibrating tumbler.
