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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.


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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