Quote Originally Posted by Michael Slade
I hadn't thought about the rubylith and Sharpee marks.

I'm really liking this Korona camera. I've had to do some 'upkeep' to it over the past week...but now it seems to be in pretty tip-top shape.

I am really liking that 10x20 format, and have looked at many of my images cropped to that ratio.

Kind of even looking for some advice about a 10x20 camera and holders custom made and trimming down film. Is that route going to be 'better' than trimming down 12x20 negs? Yeah, I know it depends on what 'better' means...just thinking out loud for a bit.
Michael, I use something simular to Rubylith http://www.base-line.com/masking.htm I forget who it was but one of the members recommended this product. I use it for masking 11x14 and it works great, I use the same mask multiple times.