Create prints using Spirulina and Matcha

Reader, remember when we explored toning cyanotype with Matcha? Now, let’s dive into something new: creating anthotypes with Matcha and Spirulina!

What is an Anthotype:

It's a photographic print made using natural pigments from plants—in this case, Matcha and Spirulina. These pigments are photosensitive and fade when exposed to light.

from left to right: blueberry anthotype, turmeric anthotype , grass anthotype

How to print with Matcha and Spirulina:

1) Gather Your Materials: You'll need matcha and spirulina powder for easy mixing. Also, get some 96% isopropyl alcohol, which you can find at most supermarkets.

2) Mix the Ingredients: In a container, combine approximately 3 tablespoons of the powders with 1 to 2 tablespoons of alcohol. Aim for a liquid consistency.

3) Stir Vigorously: Stir the mixture energetically for a few minutes. The alcohol acts as a solvent, effectively dissolving the pigments in both the spirulina and matcha. Spirulina contains chlorophyll and phycocyanin, while matcha is rich in chlorophyll, carotenoids, and anthocyanins. This process will result in a liquid green solution, perfect for coating on paper.

4) Settle the Mixture: Allow the mixture to sit for 5 minutes so the powder settles at the bottom of the glass. Alternatively, you can filter the mixture through a cloth, but letting it settle works just as well.

Same paper. LEFT: Spirulina. RIGHT: Matcha

5) Apply the Solution: Dip your brush into the container, carefully avoiding the settled powder at the bottom. Only use the liquid to prevent imperfections in your print. Matcha powder can cause more visible imperfections once dried, while dried spirulina can be easily brushed away.

Left: Spirulina. Center: Digital Positive. Right: Matcha

6) Dry and Expose: Let the coated sheets dry in the dark. Once dry, expose them using a digital positive or a solid object (like a dried leaf). Due to the high volatility of alcohol, it evaporates quickly, especially with increased light and heat. This means your exposure time is fast—leave the sheets in direct sunlight for 3-4 hours.

What is a Digital Positive?
A digital positive is a clear film (aka transparency or acetate) printed with a positive photographic image, typically using an inkjet printer, commonly used in alternative processes.

PRINTS MADE WITH SPIRULINA