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

----- Original Message ----- 
From: Kashyap Deepak
To: Homebrew_PCBs@yahoogroups.com
Sent: Friday, January 26, 2007 3:51 PM
Subject: [Homebrew_PCBs] Re: PCB how to ? for India


The Problem with it it is too expensive .
How can I make my own instead ?

Thank you
Deepak

--- In Homebrew_PCBs@yahoogroups.com, "Stig Ankj\ufffdr 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