Re: Indigo

My experience has been the same as Mr. Gerling's. Until recently, I have
been working exclusively with 4 color gums. About 2-3 years ago, I found an
old recipe for them from my college days and decided to give it a whirl. I
have been using pretty much the usual 4 colors, the ratio for which were
included in the instructions. For me, it worked well.

Lately, I have been branching out a bit and found that I like the indigo
color and have tried more than one ratio. In theory indigo would seem to
have the required characteristics. But I guess not.

Thank you for the replies.

Candace Spearman

----- Original Message -----
From: "Dave Soemarko" <fotodave@dsoemarko.us>
To: <keith@gumphoto.com>; <alt-photo-process-l@skyway.usask.ca>
Sent: Thursday, January 22, 2004 10:53 PM
Subject: Re: Indigo

> You could also add a little quinacridone red as real indigo has a touch of
> red. How much of it is up to your liking. The color of real indigo ranges
> from purple to violet. In an acidic environment, the flowers are redder,
and
> in a more alkaline environment, the flowers are bluer. I believe this is
the
> same principle used in lithmus paper also.
>
> Of course most "indigo" colors don't use real indigo plant anymore as the
> manufacturing is complicated yet the color is non-permanent.
>
> Dave S
>
> ----- Original Message -----
> From: "Keith Gerling" <keith@gumphoto.com>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Thursday, January 22, 2004 10:58 PM
> Subject: RE: Indigo
>
>
> > Indigo is the only pigment I've encountered that flakes whenever I've
used
> > it on any kind of paper. I'm probably on record as saying that ANY
> pigment
> > can be used with gum, but the truth is I've never had any success with
any
> > indigo. Honestly, before I tried indigo, I always wondered what
"flaking"
> > was when I heard it discussed regarding gum printing. Someone
> (Katherine?)
> > mentioned here that modern indigo contains lamp black. Maybe that
> > contributes to the problem (although I actually haven't had that many
> > problems with lamp black on the few occasions I've used it.)
> >
> > This is what I do to achieve an indigo type color: mix 1 part pthalo
blue
> to
> > 4-5 parts ivory black. It's very close to indigo.
> >
> > -----Original Message-----
> > From: ericawd [mailto:ericawd@mem.quik.com]
> > Sent: Thursday, January 22, 2004 9:13 PM
> > To: alt-photo-process-l@sask.usask.ca
> > Subject: Indigo
> >
> >
> > I am having trouble with achieving the right gum/pigment mix with
> indigo.
> > I work with gram(s) pigment to ml(s) gum ratios. (e.g.. Windsor Blue 1
> > gram to 12 ml). I have tried more than one mix and none have come out
> > satisfactory.
> >
> > Does anyone use WN Indigo and if so what ratio worked?
> >
> > Candace Spearman
> >
> >
> >
> >
> >
>
>
Received on Fri Jan 23 07:03:13 2004