The plexi that I use is not very thick...between 1/4 to 1/8th of an inch thick. I can get anywhere from 25 to 50 good prints out of a plate. I use plexi that is non-glare and made for framing, not printing. Odd i know, but  I have just had better luck with it than the other stuff. It is really easy to scratch into and the lightest of lines will print.

I put the black paper under my plexi so that I can see the line that I am makeing. It makes the matrix look like a negative when I am done because the lines I scratch in turn whitish in the plexi, and the clear areas are black from the paper being underneath.

Thanks for the link to that site!  It was  very helpful!  

Hey, I am having a show a show of a few paintings at the Skinny Pancake, at the foot of College at Lake.  Stop in and have a crepe. greg

Hi M.  Blogging photos.... the photos need to be up on the Internet somewhere already. I'm posting to my own blog then copy and pasting it here. See. If I figure out an easier way,  I'll let you know.  Keep on plugging away. Hey, How are your ink buddies doing? Are they keeping warm? 

Happy New Year,

Jen

Hi, I gesso only one side and yes there is always a risk of warping. I'm not sure what dimensions to say but large pieces should be reinforced. I use quarter inch board to minimize this rather than eight inch which is pretty flimsy by itself. I think the eighth inch thickness would work well for smaller paintings which I plan on using to reduce the weight for shipping. Are you planning on doing a painting M?

Hi, The material I'm using is 1/4" Masonite - no bracing. I think what you're seeing in the picture is the front of the table saw. 

Amazing how that button works so well. Like magic isn't it.