Electronics > Beginners
PCB Transfer via Laser Printer
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Wimberleytech:
I use transfer paper purchased from China on ebay. 
I also use the arts/crafts transfer film on top of the transferred image on the pcb.  This has significant improvement!
Transfer is done using a laminator
Etch using ferric chloride.

My layout designs attempt to minimize and keep uniform, all etched tracks.  This reduces consumption of the etchant and makes it easier to do successful narrow traces.

Sometimes I heat the etchant to speed up the process, but not always.

I have tried photo paper, glossy magazines, etc., to varying success.  My current method using the chinese stuff is consistent and repeatable.

I use HP P1102 for my printing.  I think current cartridge is not HP brand, however.
Before adopting the transfer film, I experimented with acetone vapor to melt the trace on the pcb for better coverage.  Hit and miss...transfer film is better.
Psi:

--- Quote from: Wimberleytech on April 18, 2019, 11:56:47 am ---
--- Quote from: james_s on April 17, 2019, 05:15:58 am ---
As far as chemicals being labeled carcinogenic, that's probably thanks to Prop 65 in CA which labels virtually *everything* as carcinogenic. I would not be surprised if that warning is somewhere on the photo paper too.

--- End quote ---

Imagine the billions of gallons of carcinogenic ink wasted to print on every product: the California Disclaimer.  The land of fruits and nuts.

--- End quote ---


If i owned a bottled water company i would make a version of my bottled water that had the California Carcinogenic warning label on it and sell that version exclusively in California. 
True it wouldn't sell very well, but to hell with it. I'd do it just to poke fun at the stupidity of that California law.
madires:

--- Quote from: David Cutcher CEG on April 17, 2019, 02:14:58 am ---Here in Canada, the classroom chemicals for photo resist transfer were labeled carcinogenic.

--- End quote ---

NaOH is everywhere, it's even used for food preparation. :-//
james_s:

--- Quote from: Psi on April 18, 2019, 08:47:21 am ---
--- Quote from: james_s on April 17, 2019, 03:59:50 pm ---I use a similar technique but instead of cutting slits I just tape the leading edge. I also draw an arrow on the paper before I run it through the printer the first time so I can remember which way to stick it in for the second pass.

--- End quote ---

I did consider using tape but i figured it would probably melt when going through the fuser. Then stick to everything and ruin the printer, so i never tired it.

--- End quote ---

I use ordinary scotch tape, it works fine, I've done it hundreds of times and never had the tape melt or gum anything up, Xerox and HP printers. I think the tape has too much thermal mass for the time it spends in the fuser.
james_s:

--- Quote from: Wimberleytech on April 18, 2019, 11:56:47 am ---
--- Quote from: james_s on April 17, 2019, 05:15:58 am ---
As far as chemicals being labeled carcinogenic, that's probably thanks to Prop 65 in CA which labels virtually *everything* as carcinogenic. I would not be surprised if that warning is somewhere on the photo paper too.

--- End quote ---

Imagine the billions of gallons of carcinogenic ink wasted to print on every product: the California Disclaimer.  The land of fruits and nuts.

--- End quote ---

The law was created based on good intentions but there's that old saying about the road to hell. The problem is that it's written in such a way that makes it inevitable that nearly everything will end up on that list because there's no penalty for a false positive but potentially huge penalties for a false negative. It also doesn't take quantity into account and at high enough levels even the most benign substances can kill you or possibly cause cancer. It was doomed to failure from the very start, a warning that is on everything tells you nothing.

For what it's worth, I'm pretty sure there was one of those California cancer warnings on my printer.
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