Light Filter: How You Can Make A Sunprint

We all know that we have our own unique fingerprints but did you know that you can make sun prints? You may be wondering what a sunprint is, a sunprint is like a unique type of photo made with special sunprint paper that with the help of the sun creates a permanent image. A sunprint is formed when a chemical reaction happens with chemicals inside the paper,but before we talk about that, here is how you make a sunprint. You can make a sunprint by placing an object on a sheet of sunprint paper, set it in the sun for approximately 1-5 minutes, soak the paper in some water for about 1 minute, let the paper air dry and watch as your long lasting image appears. A ray of sunlight is made up of different colors which you can see in a rainbow. In this project I will be testing which “Light filter” allows the most and the least light through to determine which light filter allows for the best sunprint image. With a little imagination, some sunlight, water and …show more content…
Sunprint paper is also called Cyanotype Paper which is a light sensitive coated paper. This light sensitive coating is called Berlin Green. When this chemical is exposed to light and rinsed away it leaves a dark blue color on the paper. This chemical washes away because it is water soluble, which means it dissolves in water. When sunlight hits the sunprint paper it causes a chemical reaction with the Berlin Green which causes the paper to turn into a chemical called Prussian blue. Prussian blue is dark blue and when the paper is rinsed the dark blue does not wash off. Since the dark blue does not rinse off the paper, the area that was shaded by the object allows the Berlin Green to be washed off of the sunprint paper which creates a white image on a dark blue