Cyanotype - over pigment prints

Drying the emulsion	After the paper is coated lay it flat to dry in a dark place.
Exposing the print	Place the paper on a support base and then negative on top of the pigment print with the registration as accurate as possible. Then a thick sheet of glass on top of this to hold the two in close contact   While there are many ways you can expose the emulsion to UV the sun is a source many people use - hence the name Sun printing used for many of these processes. While the sun works well it is also variable and you may need to do some experiments. This print had 45 min's on an over cast day. If you are doing lots of work you might like to build an exposure box with a UV lamp.
The exposed print	Different emulsions produce slightly different effects but in this image you can see the change after the exposure.
	After the exposure the print is washed in water - if you have trouble washing out the yellow orange of the Potassium Ferricyanide, increase the temperature of the water.

The final cyanotype over pigment print.

 

 

 

Thanks for the info and great to hear fom you - Trust that house is going OK

I figured this out - but I ended up with 2 hr exposures and then post fogging the print for 45 seconds which helped a lot and saved a huge amount of time. So after the initial exposure had finished, I would fogg the whole sheet for the 45 secs in full sun. I even carried out this fogging with the shadow of other leaves falling over the paper so it retained some highlights in the print.

The project is finished now and up on the wall and we are away back home to Aussie on Monday -

the interesting thing was the dark room - Chambre Noire - each pinhole produced and image and the lines circles of light on the ground and walls are actually the sun - at certain times you could see the leaves aross the projection of the sun and each one had a slight variation - so when the wind blew they all moved in unison. Of course the fog produced a fantasic effect.

Best wishes Lloyd

hi lloyd-
> i see youre using leave on the cyano prints!  if i'm not too
> late, try printing for a 1/2 to all day!  then you should get
> the details.
> since its a UV process, the green leaves really block UV. 
>  you'll find the sun lamp (or ...?) will be much slower than
> natural light.  even a gray day prints faster than the
> lights.
> i used fluroescent tubes for exposures (at one time in my
> life).  i used a bank of tubes to expose the whole paper, and
> i had it 3-4" (ah... 8-10cm.) from the page.  i like my
> prints really dark blue- and i vaguely recall i was making 18 hour
> exposures. 
> i hope you don't mind my input.  i look forward to seeing the
> finished project.
> n
> Nan Wollman 4500 1/2 Homer St. Los Angeles, CA 90031
> 323-343-1098 www.wollmanstudios.com