Hydrogen Peroxide 6% 200ml


The cyanotype takes 24 hours for the oxidization to bring up the full image density.

To create instant oxidisation (changes to a brilliant blue) place in a water bath of  0.3% hydrogen peroxide for no more than 30 seconds

Continue to wash as usual.

Interesting fact  – Hydrogen peroxide was discovered in 1818 by the French chemist Louis Jacques Thenard. Thenard called his creation “oxygenated water” because it is essentially water with an extra oxygen atom.