Homebrew PCBs

What is the shelf life of silkscreen emulsion?  Do you have to mix the
emulsion with a sensitizer?

 

Jeff

 

  _____  

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Roland F. Harriston
Sent: Sunday, April 15, 2012 11:59 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Re: Alternative photoresist chemicals - Idea?

 

  

Ulano was the company that made the stuff I purchased many years ago.
I think they also made a material called "Rubylith".
Old-time microstripline designers will remember this material.

As I recall, most silk screen inks were spirit-based, and the screen image
was not affected by the paint.

So, I'm thinking that the emulsion would most likely be immune to
most pc board etchants.

Someone should really get into this idea and see how it works.

Roland F. Harriston, P.D.
******************

Randall Morgan wrote:
> Silk Screen Emulsion Source:
>
http://www.silkscreeningsupplies.com/diazo-photo-emulsion?gclid=CNDprfSXt68C
FYYHRQodu2zWjQ
>
>
> I have no idea if it works but would be interesting to find out.
>
>
>
> On Sun, Apr 15, 2012 at 8:27 AM, Roland F. Harriston <rolohar@...
<mailto:rolohar%40comcast.net> >wrote:
>
> 
>> **
>>
>>
>> 





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