Bonus: What about the rest of the films?

Color photographic materials have strict requirements on shelf life. If the storage period exceeds the specified conditions, its performance will change, and it will not achieve normal results in normal use, which is certain.

In practical work, sometimes it is influenced by various situations, and the film is outdated or seriously outdated. 1985, the author bought a large number of Kodak II 120 negative films and reverse films. Due to the improvement of the quality of 135 camera and film and the convenience of use, this batch of 120 film was stored indoors at room temperature for 5 years (1986 expired) until 198. It is a pity to abandon this batch of expired films and doubt their performance when using them. Therefore, according to its characteristics of low sensitivity, low contrast and heavy fog, it is used to shoot night scenes and scenes with strong contrast in order to learn from each other. The effect is exciting.

At night, under the illumination, the brightness of the light-receiving surface is large, but the contrast between the part without direct light and the light-receiving part is large, which plays the "advantage" of the weak contrast expired film. In addition, the light source of night scenes is mainly light, while tungsten lamp is red and yellow, which is the "nature" of expired films; The color of high-pressure mercury lamp is mostly cyan, and there is no red or yellow spectrum, but its light intensity can make the expired film lacking cyan provide enough color sense, which objectively makes up for the missing part of the film. In addition, the night scene needs long exposure in order to capture the light lines flowing by cars. The relationship between these lengths provides a useful position for expired films. The photo 1 Dance of the Golden Snake is exposed for 3 minutes, and the aperture is F/ 1 1. When the shutter is closed (T-door), the impact of vibration on the fuselage is deliberately avoided, trying to create a jumping effect. As a result, I was ecstatic and even selected for the film contest. Fig. 2 Sunset on the Yellow River was shot with ISO200 reverse film, and then developed into a negative by the expansion shop. Compared with the effect of shooting with normal negative film at the same time, the contrast of the scenery in the lower part of the sun is sharper than that in the negative film, which is the effect that the contrast of the expired reverse film is still high.