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Author Topic: Is it 0.30 or 0.03? Confusing particle sizes for Aluminum Oxide Linde A polish  (Read 981 times)

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finegemdesigns

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    • finegemdesigns

Let's talk polish and polishing...

 :glasses9:

https://www.youtube.com/watch?v=4RGzZASnV54

(best viewed in either Theater mode or Full Screen - HD 1080p is also available)

There are at least 2 sellers on the internet with this issue. Labeling their Linde A sapphire powder as being 0.03 micron when it's more likely standard 0.30 micron. While 0.03 micron is available it is much more expensive and is likely not useful for any normal lapidary purpose. 0.03 micron is TEN TIMES finer than 0.30 micron so you probably couldn't even see the difference in polish and it's also more than twice the cost per oz. of 0.30 micron Linde A.
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lapidaryrough

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http://lapidarysupplies.com/catalog_pages_2016/page_07.pdf

  This site has some of the best prices and inventory on the net. for lapidary.  My only source for grit.

  Jack
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Silicate life form

finegemdesigns

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Note: Vince supplied me with a couple of interesting links about nano micron polishes:  :icon_sunny:

Quote from: Vince
Micron sizes like .02 are still available, and not as costly as I had assumed. Check out these links:

https://www.sigmaaldrich.com/catalog/product/aldrich/544833?lang=en&region=US&cm_sp=Insite-_-prodRecCold_xorders-_-prodRecCold2-1

http://www.unitconversion.org/length/nanometers-to-microns-conversion.html

As I mentioned before it seems unlikely that these particles in the 900,000 grit range have any practical value for lapidary. 0.03 micron is ten times finer than 0.30 micron which is a normal grit for high grade Linde A.
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peruano

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Jack,  Thanks for the Minn. Lapidary Supply link.  Always looking for a new take on supplies. 
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Combining a love of bikes (pedal and otherwise) with hiking, hounding, lapidary, and the great outdoors
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