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?
An anthotype is a photographic print made using natural pigments from plants. These pigments are photosensitive and fade when exposed to light. Historically, anthotypes were used as a simple and eco-friendly method to create images, dating back to the early 19th century. In our project, we'll use Matcha and Spirulina as the primary pigments.
from left to right: blueberry anthotype, turmeric anthotype , grass anthotype
Create a Spirulina Anthotype
1) Gather Your Materials
Matcha and Spirulina powder
96% isopropyl alcohol (available at most supermarkets)
Brushes for applying the solution
Paper (get a 300gr paper that is acid free and not treated, preferably cold pressed)
Digital positive or solid objects for creating the image
2) Mix the Ingredients
In a container, combine approximately 3 tablespoons of Matcha or Spirulina powder with 1 to 2 tablespoons of alcohol. Aim for a liquid consistency that will be easy to apply to the paper.
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 container. Alternatively, you can filter the mixture through a cloth to remove any undissolved particles .
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. Note that Matcha powder can cause more visible imperfections once dried, while dried Spirulina can be easily brushed away.
left: spirulina - 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 (also known as transparency or acetate) printed with a positive photographic image, typically using an inkjet printer. Digital positives are commonly used in alternative photographic processes to create high-quality prints.
Anthotypes created with Spirulina:
Anthotypes created with Matcha
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