£53.00 UK/$53.00 US

X-RAY SPRAY

Turns opaque paper temporarily translucent, allowing the user to view the contents of an envelope without ever opening it. Thirty seconds after the application, the envelope will return to its original state, leaving absolutely no markings, discoloration, or other indications of use.

Each unit can treat several hundred square inches. Non-flammable, non-conductive, and non-photo chemically reactive. Environmentally-friendly (contains no Freon or ozone-depleting compounds). Net weight: 9 oz.