Re: ATM [long] Getting the smoothest mirror (no dog biscuit)

[Jim Fitch <jf@arn.net>]

mark cowan wrote:
> 
> Jon Bertrand wrote:
> 
> > How do you get a _really_ smooth figure?
> >
> >     Keep good contact - warm with a hair dryer and press, press, press.
> 
> Warm lap and mirror with warm tap water, soak don't rinse, full-body press for
> about 30 seconds does it for me...

Be careful if you have a plaster tool. I dunked mine in warm water and
was watching the little streams of bubbles rising from the edge of the
tool when I noticed the pitch was deforming in some areas due to bubble
formation under the lap. No great harm but a few places near the edge
will never regain contact due to the depression left by a bursted
bubble. Making a tape dam to hold the water on the surface of the lap
would take care of the problem, but it is so easy to just dunk it.....

> >     Do short (minute or two sessions) then press press press.
> 
> Worthless, IMHO.  Dog biscuit is a large tedious thing and you need to remove it by
> dedicated effort.  Underline effort.  

I think all the pressing was to remove the zoning, but that thought
went to the dogs. ;)

Jim Fitch
Amarillo TX