--- In
Homebrew_PCBs@yahoogroups.com, "gettingalongwouldbenice"
<gettingalongwouldbenice@y...> wrote:
>
> I'm gonna make a prediction.
> If you're setting up a continuous run process, there may be a lot
> of options.
> For those of us who want to make a board once a month, there are a
> number of issues.
> Given the smallness of the print head holes and the etch resistness
> of the ink, I expect there won't be a printable resist with the
> shelf life that we low volume users need.
>
Well actually the device is more targeted to the ed user rather than a
continuos process. The basic idea is that the end user will use the
device most like his own printer. There are out there on the market
inks that resist to corrosion of FeCl. this is one of the issues. The
second one pointed out by somebody else is the clogging and ink drying
in print head. I adressed that and i will test it for long term idle
states. Thank you for the ideas printing on resist... it can be an
option actually you can pull that out by using your favorite photo
cartridge ink which has an ink compoonent specially designed for UV
protection. So if you can print in photocolor on your PCB you are done.
> I predict that a workable low volume solution will require a two-part
> resist. You slather part one on the board. Then you print the
> pattern with part two. I expect one might find a low viscocity
> printable fluid that reacts with the other part on the board.
>
> It's very much like photo printing except.
> You're just using printed patterns rather than light.
> IN fact, i wonder if you couldn't just start experimenting with
photosensitive
> boards and print the pattern in developer. That shows you how much
I (don't) know about photography.
>
> I've toyed with the possibility of printing an electroless plating
> solution that resists the etch.
>
> IIRC, early TEK boards were copper plated with more copper then
nickel then plated with gold. The gold resisted the etch. But maybe
I don't
> know what I'm talking about.
> mike
>
thank you again mike.
iulian