Photographic Reproduction.

The image may be copied using a modern colour film [and, if necessary, a modern format] to produce a "good visual match". Generally, this is not difficult and the only difficulty usually involves the control of contrast. Faded dyes usually result in low contrast images that are difficult to grade. The most common materials used for this purpose are Eastman Colour Internegative, Eastman Colour Intermediate, or Eastman Colour Negative [depending on the contrast needed] to make a negative that is then printed onto a modern colour print film.

Contrast of colour materials is difficult to change by changing the process conditions although it is regularly attempted. Pre-flashing is a technique that allows the inherent contrast of a stock to be reduced. This procedure is dealt with in the chapter on Duplication and mentioned again below.

Throughout the world laboratories have experimented with using various masked negative films for the non-standard purpose of making internegatives from projection prints, either pre-flashed or unaltered. There is no doubt that some films respond to flashing more uniformly than others, and some are capable of heavy flashing to lower contrasts by as much as 15%. In 1995, Fuji Colour Negative 64 was used extensively for this reason. It must be emphasised that the manufacturers do not test or promote their films for this purpose and within a matter of months this sort of advice can become incorrect as the batches of film stock alter and with it their ability to carry out these non-standard practices. Some additive systems [Dufay is a good example] cannot ever yield a matching copy on any subtractive colour film as subtractive colour reproduction is inherently unable to match the range of saturated colours possible by additive colour reproduction and is particularly unable to reproduce the saturation of the additive primaries.