MATERIALS NEEDED: 

- Cyanotype sensitizer solution (Parts A & B)

- Mixing container and brush or sponge

- Watercolor paper or cotton paper

- Negative image printed on transparency film (inverted black & white)

- Foam brush or sponge brush

- Contact printing frame or a piece of cardboard and plexiglass

- Sunlight or UV lamp

- Tray or container for rinsing

- Water

Steps:

1. Prepare the Cyanotype Solution

In a dim room or low light, mix equal parts of Solution A and Solution B from the cyanotype kit (usually 1:1 ratio). Only mix as much as you need, and label containers clearly.

2. Coat the Paper

Using a foam brush or sponge, evenly coat your paper with the mixed solution. Cover the entire area where the image will go. Let the paper dry completely in the dark (about 30–60 minutes).

3. Prepare the Negative

Print your photo as a black-and-white negative on transparency film. Dark areas block light and will appear white on your print. Place the dried, coated paper on a flat surface, then position the negative on top (emulsion side down).

4. Expose to UV Light

Secure the negative and paper between a piece of cardboard and a clear sheet of plexiglass or in a contact printing frame. Expose it to sunlight or a UV lamp for 10–20 minutes. The image should turn a bronze-greenish color.

5. Rinse the Print

After exposure, rinse the print in a tray of cool water for 5–10 minutes. Gently agitate to remove excess chemicals. The blue color will begin to appear, and the white areas will wash out.

6. Dry and Finish

Lay the print flat or hang it to air dry. The blue will darken and deepen as it dries fully, usually within a few hours.