Homebrew_PCBs

> How much knowledge to you have on ink formulations ? Its an entire

field

> of expertise. Inkjet ink chemists are specialized people. You want

to

> develop your own inkjet ink that gives high image quality AND can

also

> forms a stable acid etch resist ? ! My best bet would search
> http://www.uspto.gov and see if anyone else has done it.
>
> The reason why everyone uses photoresists is because it works the

best.

> The phototool is important, and I've only ever seen good ones

from an

> inkjet./transparency, I've also seen many more bad ones from

various

> inkjets and inkjet transparencies. Its important that the ink and
> transparency are compatible with each other, otherwise you get pin
> holes, banding and rough edges. The Epson stylus series do very

good job

> with their dye based black inks on their transparency. Only problem

they

> are expensive. I suspect Epson have patented their transparency

because

> no one else make one the same. You can print on it then dunk it in

water

> and nothing happens to the ink. There are other transparencies that

work

> well with the Epson black ink. The HP inkjets use a pigment black

and do

> not go so well on Epson transparencies. Use HP transparencies with

HP

> ink, the results are quite ok.

I'm not looking for ink for an ink-jet, I am looking for ink that one
would use for silk-screen type printing.

Ink for printing with an ink-jet print head would be very thin. I am
looking for a nice thick almost paint like ink that is acid (etch)
resistant.

I have been reading more and more about a certain kind of etch resist
pen that uses a laquer based ink. Perhaps I will try some type of
laquer paint/ink.

I am also considering the photoresist method as it sounds like this
is the method of choice here.

I will start a new thread.