Homebrew PCBs

----- Original Message ----- 
From: "Markus Zingg" <homebrew-pcb@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, November 27, 2008 5:24 PM
Subject: Re: [Homebrew_PCBs] Re: Help needed with Riston film


> No, the rolls are "soft". Atleast all rolls from the laminators I had a
> chance to look at. I don't know what particular material the rolls are
> made off, but they feel like "rubber" or something like this. Obviousely
> they can take the heat though. I just noticed that most laminators seem
> to have smaller diameter rolls and the one I'm having most sucess with
> is useing a bigger diameter (more in the range of 35 to 40mm as oposed
> to ~30mm).

Thanks, Markus.

The Xerox rollers must have been about 80 mm diameter, and should work even 
better. I suppose something like that is used in the laminators used by PCB 
manufacturers.

Now I think of it, Xerox used two rollers - the heated one was coated in 
Teflon and was hard, and the lower roller was soft. A film of silicone oil 
was applied to the heated roller.

Leon