Laser films are single emulsion films. The emulsion is silver halide sensitized to the red light , which is the inherent colour of lasers used in printers. Therefore it has to be handled under total darkness. These films are for wet chemical processing.

Dry laser films have an emusion consisting of Silver behenate instead of silver halide. Silver behenate is a crystalline long-chain silver carboxylate. The image is formed after exposure to laser and heated to a temperature of 120 degrees celcious.

There is no special composition for so called day light films, except that they are packed in such a way that they can be loaded into a device in daylight, without being exposed to light.

 out of  found this valuable. Do you find this valuable?    

Hi Vitharana,

The Canadian regulations simply say the film transport mechanism of film processors must be cleaned frequently [1]. A site I visited that still used film cleaned their roller racks weekly. The manufacturer recommendation might be a good place to start. The danger in not cleaning them often enough, as I'm sure you know, is that debris on the racks scratches the film causing artifacts. As long as you clean them often enough to prevent this, it should be O.K.

1. Health Canada. Safety Code 35: Safety Procedures for the Installation, Use and Control of X-ray Equipment in Large Medical Radiological Facilities. 2008. http://www.hc-sc.gc.ca/ewh-semt/alt_formats/hecs-sesc/pdf/pubs/radiation/safety-code_35-securite/safety-code35-securite-eng.pdf

 out of  found this valuable. Do you find this valuable?