Rainer,
Your exposures seem to be excessively long. 2-5 min. in strong sunlight would be about right unless your negatives have excessive density. With cyanotype you should expose untill the shadows are purple-silver.
Bob Schramm
Check out my web page at:
http://www.SchrammStudio.com
also look at:
http://www.wlsc.wvnet.edu/www/pubrel/photo.html
>From: Rainer Ortlieb
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: Cyanotype
>Date: Thu, 11 Apr 2002 20:37:58 +0200
>
>Hallo, greetings from Germany!
>I make cyanotype prints for some years, using papers from "Arches"-
>the simple ones, not Arches Platine.
>I have no problems getting full range, using regular and fresh
>emulsion.
>But I need long exposure ( 1 hour in the sun).
>By the way, when using fabric for cyanotype I have a yellow stain
>in the lights.
>Any idea how to avoid it?
>
>Rainer
>
>----- Original Message -----
>From: "Judy Seigel"
>To:
>Cc:
>Sent: Tuesday, April 09, 2002 3:56 AM
>Subject: Re: Cyanotype
>
>
> >
> > On Mon, 8 Apr 2002, Philippe Monnoyer wrote:
> >
> > > Maybe this is often asked but here is my question:
> > > How to avoid a cyanotype print to readily dissapear in a blue
>particles
> > > cloud in the first water bath.
> >
> > Philippe, If the runoff is blue that means it's exposed, not
>underexposed,
> > and for whatever reason didn't soak into the paper. You could be
>using a
> > non-absorbent paper, or a gelatin sized paper (a no-no for cyano) it
> > doesn't sink in through, or maybe coating with puddle pusher, which
>also
> > tends to sit on top not absorb. Or possibly your emulsion is too
>fresh,
> > may wash off if it hasn't been aged in the bottle a couple of
>days -- or
> > that's the case with REGULAR cyano. I've never used the upgrade,
>which I
> > believe can be temperamental.
> >
> > Or another thought -- are you heat drying the emulsion? That can
>dry it
> > as surface skin before it soaks into the paper, in which case it
>will also
> > wash off.
> >
> > Of course the grand irony is that one reason Ware invented the "New
> > Cyanotype" was sight of blue down the drain. We never knew why
>because
> > around here it doesn't happen. Maybe it's something European? (Is
>Buxton
> > in Europe?)
> >
> > best,
> >
> > Judy
> >
> >
> > > I just started cyanotype printing w/ Mike Ware recipe (but twice
>as
> > > concentrated)and the image does not remain on the paper when
>processed
> > > ...
> > > Any suggestions ?
> > >
> > > Thanks,
> > >
> > > Philippe Monnoyer
> > > Belgium
> > >
> >
> >
>
>
>
>
>
>