Invented in 1842 by the English scientist John Herschel, it was used as a means to reproduce diagrams and technical drawings until a few decades ago.

The light to produce prints in shades of blue, drawing through the use of negatives and masks onto a sheet of paper soaked by a photosensitive solution composed of potassium ferricyanide and ferric ammonium citrate.

The final objective of the workshop is to provide all the useful information to make the participants autonomous once they have learned the procedure.

After the presentation of the technique you will be guided in the preparation of the photosensitive solution and then in the paper printing process.

It is possible to work with both drawings and pictures which, however, must be on a transparent medium such as acetate (both positive and negative are fine) but also with objects such as flowers, leaves or fabric textures that will leave their own imprint on the soaked paper of iron salts.