----- Original Message ----- From: "James Schenken" <jds@xxxxxxxxxxxxxxx> To: "List for Photo/Imaging Educators - Professionals - Students" <photoforum@xxxxxxxxxxxxxxxxxxxxxx> Sent: Tuesday, September 26, 2006 2:43 Subject: Photo Paper through security checkpoint update : One of the possibilities mentioned was to re-wrap the paper in : 'Rubylith" so the security folks could see without opening it up and : ruining the paper. : : For those younger than Methuselah, "Rubylith" is a transparent red : film used in lithography that effectively blocks out light. It used : to be used in laying out print material to leave room for things to : be added later, such as images, etc. : : So, unfortunately, it won't work with modern B&W print : materials. These materials, especially the variable contrast ones, : are sensitive to both red and blue light Actually the paper is sensitive to blue and green lights, the spectral sensitivity curves being available on the kodak site, and other papers are similar to the Kodak material - red light is far safer than the orange safelights recommended - it's just that we humans can better closer to the green spectrum than we can the red. Rubylith would probably be quite fine, especially under the UV lighting which exists in airports.. I have a great big red glass window in the side of my darkroom and have never had any fogging - it's a pain though when doing colour or IR.. I have to wait 'till night time ;) k
