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spypet · 08-14-2007, 10:51 PM

can someone with;
3m Colorquartz Black T-Grade
photograph it up close against a ruler?
I'm trying to see the grain size range.
I'm looking for something in the 1-2mm range,
no more, no less...

08-14-2007, 10:51 PM	#13 (permalink)
spypet Senior Member Join Date: Jul 2007 Location: Forest Hills, NY Posts: 308 iTrader Ratings: 8 iTrader Positive Rating: 100% Plant Points: 32000	Re: Alternative Black Substrate? can someone with; 3m Colorquartz Black T-Grade photograph it up close against a ruler? I'm trying to see the grain size range. I'm looking for something in the 1-2mm range, no more, no less...