Hi Niranjan,toggle quoted messageShow quoted text
Thanks for the interest. I posted my Cuprotype process several years ago on this list. You can get details at my website: www.darkroomdoc.com.
The print is from a digital camera, negative filtered in Photoshop with a red/orange filter and a blue/green filter for the 2 colors, sort of like the old 2 color Technicolor. Printed in traditional Cyanotype first, then Cuprotype last. Cuprotype is Hatchett’s Brown (Copper II Ferrocyanide). This print is 8 yrs old and both pigments seem quite stable.
On May 30, 2021, at 11:19 AM, Niranjan Patel via groups.io <nirpat89@...> wrote: