Re: Printing frame

[Ender100@aol.com]

The glass might flex some with clamps on edges, thus actually giving you 
worse contact over the image.  I remember a fascinating display at the 
University of Illinois School of Engineering.. they had a 3 inch steel rod 
about a foot long that was supported by very heavy bases on each end.  They 
had polarized light shining on the rod.  If you pressed on  the the center of 
the rod you could actually see it bed very slightly due to the distortion it 
cause to the pattern of the polarized light.  I was amazed.  So even heavy 
plate glass must flex some.

Mark Nelson
In a message dated 5/13/02 12:00:47 PM, jseigel@panix.com writes:

<< PS. For many reasons, some obvious, some less so, clamps on edges of glass
sandwich don't work especially well. At least in my experience, has to be
weights over the image area. I use 3 gallon jugs of water and/or Liquitex
gesso. (Pictured in P-F #6.) >>