He does a total of six tests in all, some of which are specific to slide films, color negatives or color prints.

In the case of color negatives, the colors are also reversed into their respective complementary colors.

With traditional negative film, you have to make prints because 35-millimeter color negatives are almost impossible to read in their original form.

That's because color negatives have a built-in cushion, tolerating underexposures of a stop and sometimes more.

I'm no expert reader of color negatives, but I can tell a good print from a bad one.

They were designed for the printing of full-tone black-and-white images from color negatives; this is not possible with conventional orthochromatic papers.

Some special prints were made from the color negatives using the recently re-introduced Technicolor dye imbibition printing process.

Lately film technology has improved, however, so that most color slides and color negatives now will last something like a human lifetime.

Other currently available films are designed to produce color negatives for use in creating enlarged positive prints on color photographic paper.

In contrast to digital photographs, color negatives and slides consist of multiple film layers that respond to light differently.