Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: Positive resist boards on eBay
From: "Peter Leybourne" <peter.ley08@...>
Date: 2011-04-16
My guess is, the photo sensitive coating of one manufacturer will vary from
that of another.
If two formulae are not identical, the net result is, one will require
longer exposure than the other. The same thing occurred in photography with
many the different formulae printing paper and film speeds available.
Peter
Shetland