using the cyanotype process, each solar printing paper is made of high-quality blueprint paper, reliable quality, and long-lasting, not easy to deform, tear or break, can be stored for a long time. You just need to put plants, paper cutouts and other things you want to DIY on the solar printing paper, it with transparent glass or acrylic plate, sunbathe it for 10 minutes, rinse it under the tap for about 1 minute and let it dry; after drying, your work is ready to present nicely. You get 120 sheets of sun printing paper with 3 size options, A5,A6,A7 size, you can choose the right size according to your needs, the product is and not take up too much space. Using this thermal paper can be an activity that helps you relax in your spare time, and can be done with children and adults. You can gather them in classrooms, camps, libraries and other places to create together, develop their interest and improve their hands-on skills. cyanotype paper cyanotype kit sun paper paper sun print paper paper kit sun sensitive paper sun art paper cyanotype paper kit High Sensitive Sun Paper Solar Drawing Paper Sensitivity Nature Printing Paper for Kids Adults arts Crafts Colour:blue Material:natural fiber Size:10.5x7.4cm Package Contents: 4 set x cyanotype paper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.