Darryl Keil Last Activity 2025-02-12 2:48 PM
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Dave Shaw

 
Subject : Sand Shading Sand for marquetry
Posted : 2005-11-04 10:03 AM
Post #32532
I have been trying to find some sand that doesn't have warning lables all over it(silica sand)and isn't full of odd and large sized pieces (playground sand). What I wanted in the sand was fairly uniform sized grains and something not as 'sticky' as playground sand. During reading on a sand blasting site I found a statement that said silica sand would cover cover the viewing window in a blasting chamber due to static electricity but that aluminum oxide would not. That sounded like the solution to the 'stickyness' issue. I found a site ( http://www.abrasivedepot.com ) that sells aluminum oxide in small quantities. I purchased a 3 pound container of white 240 mesh material. A 3 lb canister fills a 6" frying pan. The 240 grit is 50 microns in diameter (about 0.002" and the stuff is like dust but still easy to insert marquetry pieces. I'm thinking that the 120 mesh (0.004" dia.) might be better and the 60 mesh (about 0.01" might be OK but maybe to coarse. Any way, the shading results have been great and the AlO3 just comes off the parts with a tap. I like this stuff alot. I sent some to Paul Schruch to evaluate and Brian Gray will also be doing some tests. I'm sure they will post results.


 
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Dave Shaw

Posts: 37

Joined: 2005-11-06
Location: Arizona

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Subject : RE: Sand Shading Sand for marquetry
Posted : 2005-11-06 5:48 PM
Post #32537 - In reply to #32532
The aluminum oxide in about a 120 grit is sold on ebay for making your own exfoliation treatments. Nothing like sanding your skin.


 
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Brian Gray

Posts: 339

Joined: 2004-01-21
Location: Sandusky, OH

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Subject : RE: Sand Shading Sand for marquetry
Posted : 2005-11-09 9:39 PM
Post #32558 - In reply to #32537
My apologies for not contributing to this thread so far...

I ordered 6 lbs, but my job and family has had me super-tied down lately and will continue to do so until Monday or so.

I did get a chance to heat it up, but didn't shade much with it yet.

It's VERY VERY fine stuff...probably overkill on the fineness of grit, but whose to say...the finer, the more even the burn, I suppose.

I'm very impressed with the fact that it doesn't really stick to my tongs, tools, or pieces of veneer.

I'm sure that some of my previous projects have little grits of sand in them because the sandblasting sand that I used previously would stick slightly. This stuff just doesn't stick...if there is a little that does, a shake gets rid of it.

Looks great so far...I should be able to test my old sand and this new stuff soon and see if there's much difference. There may be a slight difference in how the burn looks, but so far I'm just impressed with the non-stick part...

Thanks to Dave for finding this stuff.


 
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Brian Gray

Posts: 339

Joined: 2004-01-21
Location: Sandusky, OH

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Subject : RE: Sand Shading Sand for marquetry
Posted : 2005-11-12 11:14 AM
Post #32561 - In reply to #32558
I got a chance to try the sand today properly.

Very nice. There is a better burn compared to my sandblasting sand, and play sand.

The burn is much more spread. It seems that my sandblasting sand created a nice burn, but it wouldn't fade very far onto the veneer...just near the edge, which doesn't really create the illusion of shadow. The aluminum axide creates a burn that doesn't quickly fizzle right at the edge...it spreads out and fades very nicely.

Thanks again Dave, for the heads up on this stuff.
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