I need a scource of new curtain material for the older Graflex cameras like the RBs. The material that came out was .015 thick, and the materail I have is .008. I really don't want to try and add to the materal I have, as I have tried this, and it is a bit cludgey.

Any Idea where I can get .015 thick curtain material?

Thanks,
Mark

Use the .008 you have. The original thickness may have been .006. All Graflex/Graphic cameras use the same curtain material and it swells with age and as it dries out.

Too thick of a material will not roll up into the body opening at the top, bottom, or both. Too stiff a material will not move through the camera easily resulting in excessive initial tension and loss of shutter speeds.

Are you measuring the thickness where the apertures are or the rolled up
ends of the shutter fabric on the rollers ?

.015 seems thick, my 1940"s RB measured .10 thick where the fabric
was well protected on the rollers, that part of the shutter fabric was the
most pristine to take a measurement from.

Player Piano Company has it in .008 ( black ) but the .010 which they
also have isn't black unfortunately, I did find some .012 fabric in a
local store but it's too stiff compared to the OEM fabric .