Homebrew PCBs

That is an interesting piece of information about drying the film before
printing.  One more variable to test.

 

I worry though that the artwork will change dimensions as it reabsorbs
humidity but I do not know how significant it is.  Of course that also
depends on the size of the artwork.

 

Maybe dry it again before imaging onto the PCB.

Bertho

 

From: cunningfellow  Sent: Wednesday, May 22, 2013 23:19



> Phil wrote:
> Exactly what I have found. Do you have a brand name for the gel-coat
transparency film?
> <SNIP>

Random brand here.

HOWEVER here is the big tip. They have probably absorbed a lot of moisture
from the air.

Put them in the oven for 10 mins at 140c beforehand to dry em out. They soak
up heaps of ink and get plenty dark then :D

My full procedure is
Print artwork in draft mode onto sheet of A4 Cut tranny to cover artwork
with few cm border tape tranny to paper along one edge with 3M tape put in
oven for 10 mins remove from oven and tape opposite edge run through printer
(mode = tranny+high)



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