Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Does anybody actually know what the required (or recommended) adhesion
temperature for typical negative acting dry film is?

I for some reason thought it was around 70 to 80 degrees, but I've been
experimenting with much lower temperatures (maybe 55 degrees C at the
most) with very good results (I'm using a clothes iron to laminate it
and the temperature is measured on the hot plate as best my thermocouple
will).

So I'm wondering what the actual necessary temperature is and how cold
can we go before adhesion is compromised, for the clothes iron method
the colder temperature we can use, the better, because of the danger of
blistering the polymer with irons that are too hot.