Cyanotype – some info from Mehmet

One of the techniques you will be experimenting with in Mehmet’s workshop is Cyanotype. The cyanotype process is characterized by its striking blue color, which is a result of the reaction between the chemicals and UV light.

Cyanotype is a photographic printing process that produces distinctive blue-toned images. It was developed in the 19th century and has since become a popular alternative photographic technique used by artists, photographers, and hobbyists. The cyanotype process involves using light-sensitive chemicals to create a blueprint-like image on paper or other materials. Here’s an overview of the cyanotype process: 1. **Materials Needed**: – Cyanotype kit: This typically includes two chemicals, ammonium iron(III) citrate and potassium ferricyanide, which are used to sensitize the paper. – Watercolor paper or any other suitable material: Cyanotypes work best on materials with a smooth, porous surface. – Brushes or foam applicators: Used to apply the chemicals to the paper. – Acetate or glass sheet: Used to create a contact print. 2. **Preparing the Chemicals**: – In a dimly lit room, mix equal parts of the two chemicals from the cyanotype kit with water to create the sensitizer solution. 3. **Coating the Paper**: – In a darkroom or subdued light, use a brush or foam applicator to coat the paper evenly with the sensitizer solution. Make sure the entire surface is covered. 4. **Drying the Paper**: – Hang the coated paper or lay it flat in a dark place to dry. The paper will be light sensitive at this point, so avoid exposing it to bright light. 5. **Creating the Image**: – Once the paper is dry, place objects or a negative (if you have one) directly on top of the coated paper to create the desired image. Alternatively, you can use an acetate or glass sheet to create a contact print from a negative or a digital image printed on transparent film. 6. **Exposing the Print**: – Expose the coated paper with the objects or negative to sunlight or UV light. The exposure time may vary depending on the intensity of the light source and the chemicals used. 7. **Washing the Print**: – After the desired exposure time, remove the paper from the light source and rinse it thoroughly in water. This process will wash away the unexposed chemicals and reveal the cyanotype image. 8. **Final Drying**: – Hang the washed print to dry, and you will notice the cyanotype image gradually darkening as it dries.

Source: https://theartling.com/en/artzine/what-are-cyanotypes-brilliant-blue-print/