sun print paper
Posted: Mon Mar 21, 2016 4:12 pm
what colour does not form Prussian blue? 
Hi Anura129,
I’m assuming that you’re working on the project described here:
https://www.sciencebuddies.org/science- ... p084.shtml
The sun print paper used in this project has a chemical (Berlin Green) on it that reacts when exposed to light to form another chemical called Prussian Blue. The amount of reaction is changed by the color of the light to which the paper is exposed. In the experiment you make light “filters” with markers of different colors. And the “filters” expose the sun print paper to different colors of light. The object of the experiment is to see which filter colors result in reaction to Prussian Blue and which colors “mask” the light and prevent the reaction.
I hope this helps and good luck with your project. Please post again if you have more questions.
A. Norman