Homebrew PCBs

Just a thought.

It seems you have access to making a film. If you have an access to a 
printing press company, they have what is called a manual "wipe-on" 
sensitizer for sensitizing offset aluminum plate. I am not sure
whether this will work with a copper pcb.

Also, there is another process in metal etching wherein you can
photo-etch zinc or copper plate for hot-foil stamping or
dry-embossing. If I am not mistaken, the manual photo-sensitizer is
something like a polyvinyl chloride (the much, much older process uses
something like the egg albumen).

These info were something from my 20 years ago memory and it is
already a bit hazy. Try to google information for metal etching and
you may find the correct info.

WT


--- In Homebrew_PCBs@yahoogroups.com, "Kashyap Deepak"
<kashyap_deepak@...> wrote:
>
> The Problem with it it is too expensive .
> How can I make my own instead ?
> 
> Thank you
> Deepak
> 
> --- In Homebrew_PCBs@yahoogroups.com, "Stig Ankjær Pedersen" <sap@>
> wrote:
> >
> > Hi Kashyap
> > 
> > I just checked and it seems that you have a local RS-components in
> india. www.rsindia.com.
> > They should be able to supply you with anything you need in that
> perspective.
> > 
> > Kindest Regards.
> > 
> > Stig.
> > 
> > 
> >   ----- Original Message ----- 
> >   From: Kashyap Deepak 
> >   To: Homebrew_PCBs@yahoogroups.com 
> >   Sent: Sunday, January 21, 2007 11:05 AM
> >   Subject: [Homebrew_PCBs] PCB how to ? for India
> > 
> > 
> >   Dear Friends,
> >   I am trying to setup a small prototyping facility for testing my
> designs.
> >   Usually my designs are single sided,until now I used to make it
using
> >   OHP marker pens and FeCl as etchants as these things are easily
> >   available in India.
> > 
> >   Since this technic requires an artistic hand and has zero
> >   repeatability ( for at least 2-3 boards) I want to use photo etch
> method.
> > 
> >   I tried transferring the artwork by screen printing (silk screen),it
> >   is a popular method for visiting cards here, on copper clad, but
> >   there were lot of pinholes.
> > 
> >   I tries tone transfer but my printers are all 600dpi laser again
I get
> >   pinholes.
> > 
> >   Now since I can get the films done easily I want to understand
how to
> >   do photo etch without a pre-sesitized board which is not available
> here.
> > 
> >   Can anyone help me with the name of the photoresist that I can find
> >   here in India?
> > 
> >   Any help is appreciated.
> >   Awaiting for your replies
> > 
> >   Thanking you
> >   Deepak
> >