J
JazzMan
Guest
I've used various processes in the past to make boards including
hand-drawn resist, laser transfer paper, and an odd technique of
printing the reverse image on a peeled backing sheet of labels
and ironing the toner onto the board. Results were ok, but I
wanted to try the photographic process. Being too cheap to buy
the light source I dug out my 25 year old fluorescent desk
lamp with two 18" tubes. I didn't know how long to expose the
board so I drew up a test image with the intention of using
a light shield to vary the exposure along the length of the
strip. Here's the result:
http://www.fierocentral.com/images/misc/firstetch2.jpg
The leftmost part was exposed for 5 minutes, going to
the right in decreasing 30 second increments. Here's a closeup:
http://www.fierocentral.com/images/misc/firstetch.jpg
The numbers are upside down, BTW.
The narrowest horizontal lines are 0.025" and the narrowest gap is
0.0045". This was soooo easy! I don't think I'll go back to the
old ways except for quick and dirty projects. The only downside
is the cost of presensitized boards, they're fairly expensive.
Anyway, just wanted to throw this out there.
JazzMan
--
**********************************************************
Please reply to jsavage"at"airmail.net.
Curse those darned bulk e-mailers!
**********************************************************
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
**********************************************************
hand-drawn resist, laser transfer paper, and an odd technique of
printing the reverse image on a peeled backing sheet of labels
and ironing the toner onto the board. Results were ok, but I
wanted to try the photographic process. Being too cheap to buy
the light source I dug out my 25 year old fluorescent desk
lamp with two 18" tubes. I didn't know how long to expose the
board so I drew up a test image with the intention of using
a light shield to vary the exposure along the length of the
strip. Here's the result:
http://www.fierocentral.com/images/misc/firstetch2.jpg
The leftmost part was exposed for 5 minutes, going to
the right in decreasing 30 second increments. Here's a closeup:
http://www.fierocentral.com/images/misc/firstetch.jpg
The numbers are upside down, BTW.
The narrowest horizontal lines are 0.025" and the narrowest gap is
0.0045". This was soooo easy! I don't think I'll go back to the
old ways except for quick and dirty projects. The only downside
is the cost of presensitized boards, they're fairly expensive.
Anyway, just wanted to throw this out there.
JazzMan
--
**********************************************************
Please reply to jsavage"at"airmail.net.
Curse those darned bulk e-mailers!
**********************************************************
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
**********************************************************