I have been steadily working through several experiments with this sensitiser. The key problem for me is that it yields a much softer contrast than potassium dichromate so my negatives are difficult to print with DAS.
I have however had some success with a series of rock studies that I photographed on HP5 8×10 sheet film. This series of abstract photographs will form my next carbon exhibition in summer 2014.
My work prints so far have been difficult to make in terms of contrast. I have refined my DAS formula. I am now using Kremer lamp black and oxide black pigments with the addition of glycerin and sugar plus wetting agent in my glop mixture. This has helped my highlight detail considerably and the Kremer pigment gives a neutral mezzotint free tone.
I am also printing on very old stock of fixed out oriental seagul bromide paper. This gives an unusual silvery relief to the prints. The DAS is also leaving a subtle pink stain which in this case lends itself beautifully to the print quality of the rocks as they are of wonderful soft pink granite rock formations. It is impossible to scan or copy the prints true tonal quality. Here is a silver gelatine print made some years ago of my new carbon subject. this is just a taster of more to come.
I will be printing over the festive season as the commercial studio is shut down for the holidays.
Seasons greetings and best wishes to all for 2014!!
Alternative Process by David Chalmers 
November 11th, 2016 at 11:07 am
Congrats for your work, i´m loving your tones and contrast with DAS, I´ve working with DAS recently , and indeed, the contrast it´s a headache !! BTW , i´ve used a india ink very warm, … ¿any cold or neutral pigment for raise up densities that you remende me?
Thank you very very much!