Homebrew PCBs

Just wondering...I have a few packs of Kodak polycontrast Black and
White that probably have expired by now.  Since that paper, after the
development and fixing, is designed to be soaked (washed) for quite
awhile, its properties may lend itself to toner transfer by releasing
well and keeping the image on the copper.

On the other hand, I also have some resin coated Kodak paper that is
designed not to have to go through a long wash period after fixing,
but the resin may gum up in between tracks.  A third variant I have on
hand is some paper used to make B&W prints from color negatives, and
I'm pretty sure that's resin coated.  

Just speculation at this point, hardly even a hypothesis.  Therefore,
I think I'll charge forward and laser print some old fashioned
photographic paper tomorrow and see what happens.

Cheers,
Ted

In article <e600d0+uluc@...>,
   kilocycles <kilocycles@...> wrote:

> Just speculation at this point, hardly even a hypothesis.  Therefore,
> I think I'll charge forward and laser print some old fashioned
> photographic paper tomorrow and see what happens.

Errm, isn't photographic emulsion based on Gelatine? Do you not think it
might melt in the heat?

It's interesting but gelatine doesn't melt in the
heat. It just dries out. Think of "Jello" right out of
the box. Do a google about the history of "JELLO", you
may not want to know where it comes from.

In the theater, the colored filters that are put over
lights are called "gels" for that reason. 

"Gelatine" from animal and seaweed sources is a very
ancient product. It is used today in many food abd
cosmetic products.

Myc

--- lists <stuart.winsor.lists@...> wrote:

> In article <e600d0+uluc@...>,
>    kilocycles <kilocycles@...> wrote:
> 
> > Just speculation at this point, hardly even a
> hypothesis.  Therefore,
> > I think I'll charge forward and laser print some
> old fashioned
> > photographic paper tomorrow and see what happens.
> 
> Errm, isn't photographic emulsion based on Gelatine?
> Do you not think it
> might melt in the heat?
> 
> 


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I haven't done my experiment yet...as to the heat involved,
non-resin-coated paper is ususually dried on a heated platen to
produce a glossy photo; that is, if you have a print drier, which I
don't; so no glossies.

The RC stuff is glossy by itself, and needs no such drying process.

But, the point I've taken from this is "Am I going to gum up my laser
printer if I try this thing?"  This Brother 2040 laserjet apparently
uses considerably higher temperatures than my old HP, again relying on
the info provided to me by the makers of Press N Peel Blue.  

What I will do first is apply an iron to printable side of the paper,
and see if I screw up a $15 iron rather than a $120 laser printer
(even though I wouldn't be exactly devastated if "Brother" met some
gruesome untimely death).

Cheers,
Ted

--- In Homebrew_PCBs@yahoogroups.com, Mycroft2152 <mycroft2152@...> wrote:
>
> It's interesting but gelatine doesn't melt in the
> heat. It just dries out. Think of "Jello" right out of
> the box. Do a google about the history of "JELLO", you
> may not want to know where it comes from.
> 
> In the theater, the colored filters that are put over
> lights are called "gels" for that reason. 
> 
> "Gelatine" from animal and seaweed sources is a very
> ancient product. It is used today in many food abd
> cosmetic products.
> 
> Myc
> 
> --- lists <stuart.winsor.lists@...> wrote:
> 
> > In article <e600d0+uluc@...>,
> >    kilocycles <kilocycles@...> wrote:
> > 
> > > Just speculation at this point, hardly even a
> > hypothesis.  Therefore,
> > > I think I'll charge forward and laser print some
> > old fashioned
> > > photographic paper tomorrow and see what happens.
> > 
> > Errm, isn't photographic emulsion based on Gelatine?
> > Do you not think it
> > might melt in the heat?
---snip---