When two polarizing filters are placed atop one another, they can be transparent or opaque to light. By rotating one of the filters, the transmitted light passing through the filters may be turned "on" or "off". Certain materials such as polyethylene, cellophane tape, plexiglass, and corn syrup can exhibit beautiful colors when placed between two polarizing filters.

These high quality plastic polarizing filters are perfect for all kinds of experimenation. Can be cut with scissors or an ordinary paper cutter.