This activity demonstrates catalysis of chemical reactions by ultraviolet (UV) light using one of the earliest photographic processes, the cyanotype process. The photographic paper for cyanotype photography is easily prepared in the classroom, giving students the opportunity to see that the photographic image is a result of chemical treatment of ordinary drawing paper. The sensitized paper can be handled in visible light. The image is produced by exposure to UV light from direct sunlight or fluorescent black lights.
Supplement
The activity sheet is available as a pdf file, which can be accessed using Acrobat Reader.
The "Chemistry Teacher Connection" (CTC) is especially for high school chemistry teachers. For only $40/year, it offers an online-only subscription to CLIC along with membership in the Division of Chemical Education, normally $65/year. CTC subscribers receive access to all articles and supplements from 1996 through the current issue.
Through special arrangement with the ACS, JCE High School CLIC is now able to provide subscribers with online access to Chemical & Engineering News articles that have been selected specifically for secondary science instructors and their students.
Occasionally, collections of JCE back issues become available for donation to individual teachers, schools, or libraries. JCE matches collections with interested recipients. Recipients pay shipping costs or pick up the collection.