Re: [ATM] Pressing was Re: Oversize tools questions

[Jan Bentz <jbentz@inreach.com>]

>Same thing when I discovered that channeling is unneeded for polishing and
>figuring.  Let the channels squeeze out and keep on going - don't stop!  But
>do keep the micro-faceting up - I scratch the pitch with something sharp
>every so often under cold water.  I scratch with 1/4 inch separation in 3
>directions at 120 degree angles - only takes a minute to refreshen.
>
>Mel Bartels
>
>
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>  
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Mels technique with the scratching  can be extended to what could be 
called "selective scratching" to correct zones.  Wherever there is a 
high zone on the mirror, lightly scratch the corresponding zone on the 
lap.  This will give a somewhat more aggressive polishing action at that 
zone.

Jan Bentz
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