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Safety light suitable for infrared films:

Infrared films respond to non-visible infrared rays, as well as to blue rays, and to a small degree, to green and visible red rays. Accordingly, the characteristics of the safety light suitable for infrared films are that it does not emit any of the aforementioned light waves, and the filter suitable for this is green in color and is similar in shape only to the filter or lamp suitable for panchromatic films. In fact, there is a difference in the natural characteristics between filters or lamps. Suitable for the previous two types, as the filter or lamp suitable for panchromatic films also emits a quantity of invisible infrared radiation, which makes it unsuitable for infrared films.

In view of the difficulty in obtaining appropriate lighting for these films, it is always advisable to circulate them or show them in complete darkness. If the reader wishes to obtain these filters, and for his convenience, we refer to the commercial name of one of these types, which is
Wratten Series VII