Tannic Acid & Sodium Carbonate Toning a Cyanotype!

[@svurskasvurska8019]

Nice image, Andy. Polyphenol tone followed by base seems to be the ticket. It has both the selenium color and that delicate palladium contrast to it. Nice.

[@stephenryde78]

I need more space to do all this cool stuff Thanks Andy

[@seanmac5507]

That's beautiful !

[@andrewweis3028]

Thanks for ‘shaking’ the ‘process’ up, Andy. I am just about to try one image that I was going to do ‘the normal’ way, but will flip gears and try it this way. By the way, when I toned the normal way with the 5 g of tannic acid, the image has almost an iridescence to it, with a almost dark sepia tone, brown and a pearlescence in the lighter parts of the image. Will keep you posted as to how this new image ‘performs.’

[@andrewweis3028]

Well, Andy, after repeating your steps, what I surmise is that there are way too many variables that can effect the outcome of the print. From the pH of the water, to the paper that is being used to print, to the concentration of the tannic acid, to even how the image was captured and then produced in the digital negative. So, it appears that the ‘answer’ to this question for reproducibility of any image is to be happy with the uniqueness of the print or not. That’s part of the fun of photography, being open to receive whatever evolves from the moment you ‘capture’ the image to its ultimate display. Embrace the unknown. ;-))

[@analogueandy8x10]

@@andrewweis3028 strength of sodium carbonate has a big effect on print colour, too. 10g per 1200ml water seemed to be the sweet spot for me. Doubling to 20g gave me a yucky red.