Re: spots and fish eyes

Chris,
If Ed's not available I'll be glad to throw this up on my website so
people can see what you're talking about, with these black spots. It
could be several things, but it depends what size the spots are, and
what they look like; it's difficult to diagnose without seeing them.

 If the fish eyes are what I'm picturing, where the emulsion opens up
holes as it's being brushed on, I'm totally with Jack on the cause: the
surface is not accepting the emulsion, and in my experience the most
likely cause for that is that the sizing is too thick or too slick. If
the sizing fills the tooth of the paper, then there's nothing for the
emulsion to hang onto. I like Jack's idea of Scotch-brite; I've used
sandpaper for the same purpose.
kt

Dave S wrote:
>
> Christina,
>
> It is hard to visualize how the fish eyes look like. Could you describe
> more?
>
> Are you using acrylic sizing?
>
> Dave S
>
> ----- Original Message -----
> From: "Christina Z. Anderson" <zphoto@montana.net>
> To: "Alt List" <alt-photo-process-l@sask.usask.ca>
> Sent: Monday, December 08, 2003 7:53 AM
> Subject: spots and fish eyes
>
> > Good morning all!
> > I was wondering what the group consensus is on the cause of fish eyes
> > in gum printing? Is it because the gum/pigment mix is too "limpid" as
> one
> > old author said (too watery)? Or is there another cause? This same
> author
> > talked about gum, when being mixed with the dichromate, goes into little
> > microscopic globules that causes this. Or spotty sizing?
> > In the same vein, I have a most unusual print I did this week that I
> > would love Ed Buffaloe to show on his site (Ed?); it is really funny. It
> > fits with my project, which is using negs from my dad's collection from
> the
> > late 20's to the late 40's, digitizing the odd shaped negs, and printing
> > them out so they look like when people were trying to make black and white
> > color (can you tell I am not very eloquent this morning...) Anyway, there
> > are all these black spots all over one side, and a line down thru the
> middle
> > that looks like water damage. I am very sure it is uneven sizing of the
> > Fabriano paper--probably due to operator error in that with my shrinking
> of
> > the paper I put one too many pieces of paper in my bathtub and did not
> > agitate enough, or perhaps it could be manufacturer error. Anyone have a
> > similar problem?
> > Chris
> >
> >
> >
> >
Received on Mon Dec 8 15:14:23 2003