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Post by woodman on Dec 28, 2018 13:30:53 GMT -5
Yeah, there is nothing lapidary available around here. Ever. I watched a video last night of someone who had built a jig to hold his pieces on the lap while they polished. Do they still need to be weighted on a rotating lap? You will still need to add weights if the rock itself does not have enough mass to create the pressure required to grind, example - those pesky slabs. There is no easy way to polish one side of a flat slab. I have tumble polished slabs up to 5 inches, but that's obviously not a one sided polish. It is real easy to polish one side of a flat slab, if you have the right equipment. This sanded on a bull wheel then polished on a 24 inch rotating polisher.
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Post by johnjsgems on Jan 2, 2019 11:32:52 GMT -5
If you want fast and your pockets are deep enough, look into the Covington 10" Maxi Lap. I sold quite a few while a dealer and was told they are fast and furious for sanding/polishing flats. A fellow show dealer always had large heels for sale. He flattened them with 220 grit on a Rociprolap and then dry sanded on a silicon carbide belt on an expando drum. I asked him what grit he used an he said "doesn't matter, 400, 600, whatever is on the drum". They were not mirror finished but looked good enough to sell.
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