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Re: Garnet sand paper

To: "Landaiche Ken (Nokia/PL)" <>
Subject: Re: Garnet sand paper
From: Roger Gibbs <>
Date: Tue, 06 Apr 1999 22:15:35 +0000

As I understand these things, garnet is a mineral which easily 
fractures, leaving sharp edges. As it is used, the garnet fractures and 
two things happen: 1) the fracturing leaves new sharp edges, and 2) the 
fracturing leaves the remaining garnet a smaller size, meaning your 80 
grit paper becomes finer and finer. 

Aluminum oxide is a much stonger abrasive. It doesn't maintain it's 
sharpness as long as garnet (and it seems to me that it starts out not 
as sharp), but lasts much longer. 

For sanding/polishing metal, garnet is not a good choice, aluminum oxide 
is much better.

For hand sanding of wood I like garnet paper, it works well and it is 
cheaper so I have less of a problem using a fresh piece (I am cheap by 
nature).  For sanding house paint I also prefer garnet paper.

For sanding/polishing metal or lacquer paint, I prefer aluminum oxide.

For any kind of power sanding I stay away from garnet - it seems to have 
a very short lifetime in any power tool application.


Landaiche Ken (Nokia/PL) wrote:
> Well, it's been a little quiet here, so what do you all think of garnet
> sandpaper?
> Learning all of my woodworking from my father, I somehow got the idea that
> aluminum oxide sandpaper was the only way to go. But my wife has been using
> garnet and last weekend I ran out of my old AlOx. The garnet stuff worked
> great for the refinishing I was doing. Any wisdom?
> Ken Landaiche

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