Quote Originally Posted by Herzeleid View Post
...
I have prepared the new cyanotype samples using initial 1 min wash in %1 sulfamic acid, the results were so superior to initial citric acid wash IMO.
...
I would agree with that, cyanotypes (both traditional and new formula) change hue toward more green when treated in citric acid. Some may like it some may not... (I like it for new cyanootype but the results are too greenish to my taste for trad. cyanotype.)

Regards,
Loris.