Results 11 to 12 of 12
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11-13-2009, 02:07 AM #11
Rock shop grit is a good thing but nix the grit down the drain.
If you ever clog the drain with grit it will be as if you poured cement down the drain. Better to have a plastic bucket of water and wash the grit off there. After a couple of hours decant (pour off) the water from the top and eventually let it dry. When it is mud, muck it out of the bucket on to old news paper and toss it in the trash. Once or twice down the drain is no big deal but it adds up over time.
If you want an adventure you can try to separate the coarse from the fine by
pouring off the 'grey' water and leaving the sandy grit on the bottom. The grit from the bottom can be used on a lap plate over and over until it is spent but do not bother, remember that you have no idea what grit size it is anymore.
When I used to polish rocks we had an iron lap plate that we would sprinkle grit on and polish the sample with finer and finer grit. We would wash the plate and sample of the previous grit and sprinkle a little bit of the next finer until done. We had a drain under the lap that went into a cascade of buckets so the mud and grit would settle out overnight prior to letting the water hit the drain.
As a side note.
When polishing a telescope mirror as a kid we would suspend the polishing rouge in water. Early in the polishing stage the suspension would stand for
only a min. As the polish got finer and finer the timer was set longer and longer before we would slurp off a charge with a turkey baster.
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The Following User Says Thank You to niftyshaving For This Useful Post:
dnjrboy (11-13-2009)
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11-13-2009, 02:29 AM #12
- Join Date
- Aug 2008
- Location
- Edmonton, Alberta
- Posts
- 573
Thanked: 74grit from the rock store rocks. I made more progress in 10 minutes tonight than I did in 30 minutes last night using sandpaper. I just put the grit on my granite floor tile, tossed on a little water, and went to town. Worked great.