Homebrew_PCBs

--- In Homebrew_PCBs@yahoogroups.com, pebo festus <mebo31@y...> wrote:

> ok, staedtler responded, but wanted more info, told
> them what printer, piezo head , printing on pcb,
> needed to be water proof for the etch we will see what
> their response is.

Progress! ;')

> the laytex paint i tryed to use was a paste, it came
> in a tube, use by artist.--- didnt work.
> tryed FUTURE and higgin india black in---didnt work.

No wonder! Pigment particles in that kind of paint are very large.

> to st--- i need a little color to seee what the
> printer is doing. have come to the conclusion that
> steve is right, glycol and FUTURE will dry and make a
> good resist, just gotta try different amounts of
> glycol in the mix, then see how it prints on the
> board.
>
> the glycol has a slight pinkish color in it so
> probably will not add additonal color.also the glycol
> is thicker--should stay in the cart better.

I didn't mean to add glycol, I meant to add inkjet ink which
-contains- glycol. A little black ink goes a long, long ways, you only
need enough to just be able to see it, right?

> folks there are lot of questions, i dont have time to
> try them all, if you have an idea ---try it and let us
> know how it works out. i have one piezo head printer
> and it takes time to try a ink, then i have to clean
> the heads, if they stop up i will be out of business
> untill i can get another printer that i can convert to
> flat bed.

We are definitely all watching. I wish I had the time and cash right
now to be doing my own tests.

I did print some Tshirt ink on some 100% cotton and washed the cotton
(I do imprinted garments) and soaked it in water, then washed it. The
ink stayed in. This is without any pretreatments or post treatments.

The question then is, will it stay on a copper PCB or will it pool and
run?

I have a black only Epson 800 here, and a color Epson 800 (with a
burnt out black head). I do plan on trying some tests of my own.

Steve