Re: ATM chasing pits??

["c f" <quantemlp@hotmail.com>]

Thanks to all that have replied to this.  I am a "newbie" when it comes to 
mirror grinding and a question or two or three are bound to come up.  I have 
cleaned up the entire area, cautious in doing one grit a night, all buckets, 
containers, and brushes then run through the dish washer while the grinding 
board I use (at the kitchen table, 18" x 18" board, with 3 cleats, non skid 
padding under the board) gets washed down, along with the table, chair and 
floor.  I am also grinding with a air filter system running on high trying 
to keep as much dust away as possible.

Again, thanks to all

Charles in wilmington,


>After 2 or 3 rounds of grinding pits out (they usually go in a single wet)
>that show up, you are starting to chase pits around the mirror.
>What is happening is that the grit is breaking off pieces of glass that are
>larger than normal as the cracking process is somewhat random and, as a
>result, there will be big pits and small pits.
>When you start chasing pits, it is time to go to the next grit size and
>grind out those large pits as well as get the general surface fined up
>nicely.  Then you will have some finer pits to chase around the mirror.
>Bob May
>http://nav.to/bobmay
>bobmay@nethere.com
>NEW! http://bobmay.astronomy.net
>
>
>

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