When they subsequently traced patterns on the blue side of the paper using a heat-emitting pen, the toner heated up and caused the dye in those areas to turn clear, selectively revealing the white ...

coli bacteria involving sheets of paper patterned by laser may assist doctors in developing ... If bacteria are present, the paper will turn blue; and if the infection can be treated with one of the ...

Red White and Blue Crafts: Visit the website for step-by-step directions. All links will open in the same tab. 1. Large DIY Patriotic Paper Rosette from The Crafty Blog Stalker Make a Large DIY ...