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Preventing Dichroic Glass from Chipping when Grinding

One common problem with grinding glass with a coated side, such as dichroic or iridescent glass, is that the coating tends to chip when ground.  Here are some suggestions for avoiding this problem:

1.  Scoring the glass on the uncoated side will generally result in less chipping.

2.  Standard thickness glass (1/8" -- 3mm) is less likely to chip than thinner glass (1/16" -- 1.5mm).

3.  An old grinding bit, which has significant wear on the diamonds, will often work better than a new bit.

4.  A grooved mirror grinding bit generally works better than a standard or fine grit bit.

Click here for a related topic, which involves using etching cream as an edge treatment for the dichroic glass.

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Copyright 2006 Brad Walker.  All rights reserved.

This tip taken from posters on the Warm Glass bulletin board. 

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Copyright 2005-2006 by M. Bradley Walker.  All rights reserved.

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