chapslv
having dreams about rocks
Member since June 2020
Posts: 56
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Post by chapslv on Feb 26, 2023 14:46:14 GMT -5
I bought an old used MT-4 "Mini-sonic". It still runs well, just a little noisy. It was manufactured by Geo-Sonics in New London, Iowa (now made by Diamond Pacific). The box had ceramic media, what appeared to be walnut shell or corn cob and a series of grit: #1 SC 80, #2 SC 220, #3 SC 600, #4 Tripoli and #5 Crystal Brite. I am used to the usual steps in my rotary tumbler and my Lot-O but I have not heard of "#5 Crystal Brite". All the contents were in baggies with masking tape labels. Following the numbering sequence, I would guess Crystal Brite is a polish but I am wondering if anyone has heard of it before?
Thanks - Steve
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Post by hummingbirdstones on Feb 26, 2023 15:54:01 GMT -5
I bought an old used MT-4 "Mini-sonic". It still runs well, just a little noisy. It was manufactured by Geo-Sonics in New London, Iowa (now made by Diamond Pacific). The box had ceramic media, what appeared to be walnut shell or corn cob and a series of grit: #1 SC 80, #2 SC 220, #3 SC 600, #4 Tripoli and #5 Crystal Brite. I am used to the usual steps in my rotary tumbler and my Lot-O but I have not heard of "#5 Crystal Brite". All the contents were in baggies with masking tape labels. Following the numbering sequence, I would guess Crystal Brite is a polish but I am wondering if anyone has heard of it before? Thanks - Steve I did some searching and it appears it's a polish for plastic crystals, probably for watches. pmcsupplies.com/crystal-bright-3-oz-compound-15644.html
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