Roger, you need to send these to the list address, not the
listowner address.
Steve, listowner
--- ralucas4277 <
ralucas4277@...> wrote:
> Date: Wed, 02 Feb 2005 13:28:06 -0000
> From: "ralucas4277" <ralucas4277@...>
> To: Homebrew_PCBs-owner@yahoogroups.com
> Subject: Re: Scratch & Etch
>
>
>
> I have been having some success in using Electrolube PRP
> (positive
> photo resist) in scratch and etch, (resistant to FeCl). I could
> never
> get PRP to expose to uv consistently so I used the old tin to try
>
> scratch and etch. No skill is required to spray the PRP (unlike
> for
> uv exposure), and the coating acts a flux and track protection.
>
> The coating scratches nicely without flaking, and I have
> consistently
> etched various track widths from 0.6mm down to 0.2mm (100mil).
>
> I am currently experimenting with various scratch tool forms to
> use
> in the cnc as a possible replacement for isolation milling.
> Scratching is quicker and quieter than routing, and overall
> cheaper
> in raw materials.
>
> Will report on the tool form(s) when I have more info.
>
> Note, I initially tried using a hot iron to cut through the PRP,
> but
> this left a variable waxy deposit on the tracks and gave poor
> etching.
>
> Regards
> Roger
>
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "onenastyviper"
> <oneNastyViper@h...> wrote:
> >
> > Thanks to all who replied.
> > I connected the plotter and it does work...Yay.
> > Next items/questions/ideas burning holes in my brain...
> > Is this Dykem(sic) Blue availble in the UK (any alternatives?)
> > How safe is it?
> > I have had an idea to try maplin pcb lacquer as the scratch
> coat...is
> > pcb lacquer ferric chloride etch safe?
> >
> > regards, PK
>
>
>
>
>
>
>
=====
Steve Greenfield // Digital photography, scanning,
Polymorph Digital Photography // retouching, and photomorphing
253-318-2473 voice // to your specs.
polymorph@... //
http://www.polyphoto.com/ // Based in Tacoma, WA, USA