Cyanotype photography is the practice of creating pictures without a camera. Trace and draw pictures on the colored paper activated by solar energy. Make sure to remove the clear filter in order for the sun to properly impact the paper. Once the filter is off, then try not to expose the sheet to light before you are ready for your print to be made, the paper is light sensitive! Although this kit contains paper activated by the suns rays, it can work in any weather. Once your drawing is complete, make sure to rinse the sheet in water and dry it for the chemicals to set in. Constructive Playthings is committed to providing safe, compliant products and a healthy, safe working environment worldwide. Constructive Playthings fully complies with the CPSIA and works closely with our suppliers and third party, CPSC approved laboratories to ensure we meet regulatory requirements. We require that all products meet all applicable federal regulations, which we review on a continuous basis