Instructables

Cyanotypes - super easy photo prints at home.

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Step 5: Developing

First, wash the print in demineralized (distilled) water until all the yellow areas of unexposed sensitizer are washed out of the paper.



Next, rinse it in the sink (under running water) for a few minutes.

This can be your final step - hang the image to dry.

If you are impatient (like me), dip the print into a solution of 125ml (.5 cups) water with one cap full hydrogen peroxide to finish the development instantly. Without this treatment, the image will change to its final color over a few hours (as it dries). Note: at first I made a new solution each time, but then I used the same solution for 10 or so prints without a decrease in potency. Rinse the print again to clean it of any remaining hydrogen peroxide. Hang to dry.


 
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