Anthotype is a technique developed in the 19th century that uses plant emulsions and sunlight to create pictures on paper and cloth.
. If you use a printed or traced negative, it must have thick, heavy lines to block as much light as possible.You can try using an actual photograph as your negative—just print the one you want in black and white using your home printer. Keep in mind that regular printer paper will block some light, so you’ll probably need to wait longer for your anthotype to finish.If you don’t have a frame in the exact size you need, don’t worry.
But absorbing energy doesn’t come for free, and when curcumin molecules get lit, they change by reorganizing their electrons, producing . These new molecules then react with the paper and have a bleaching effect, which is due to the turmeric dye fading away.When you spray the borax solution on the anthotype, it reacts to the curcumin, which is more highly concentrated in the areas that were not exposed to the sun—the lines that define your image.
This reaction generates boron-based substances that have a two-fold effect. First, they prevent further bleaching of the dye so your image doesn’t fade away with time and light exposure. Second, they enhance the definition of the image by providing a darker color to the areas under the negative.Sandra Gutierrez is a Chilean journalist and the associate DIY editor at PopSci. She has previously worked as an editor for MSN.cl, and a reporter for Rolling Stone magazine.
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