What color film is suitable for developing? What colors are there besides dark green?

Classification by color reproduction:

1, black and white film: according to its sensitivity to color, it can be divided into panchromatic film, dichroic film, color-blind film, infrared film,

Optical film, etc. , commonly used in full-color film, is a variety of colors in nature, such as red, orange, yellow, green, cyan, blue and purple, which can be displayed in different shades of black. In visible light, the color separator can feel blue and purple, yellow and green, but not red. This kind of film is often used for printing and plate making, and sometimes for landscape photography. Color-blind film is sensitive to blue-violet light in visible light, but insensitive to green light and red light, and is generally used for copying documents and black-and-white negatives. Infrared film, specially used to feel light with longer wavelength than red light, is generally used in aviation and military photography.

Selection of black and white film: How to choose low-speed, medium-speed or high-speed film depends on different requirements such as shooting object, shooting conditions and final photo magnification.

In general, when shooting outdoors, the light conditions are good, the scenery is bright and the contrast is large, so it is appropriate to choose 2 1DIN medium-speed film. If the contrast of the scene is flat, you can choose a low-speed film with a slightly higher contrast.

When shooting indoors, if the subject is dynamic, whether using natural light or lighting, we should choose a film with high sensitivity to avoid affecting the image level due to insufficient exposure or blurring the image of dynamic objects due to too long exposure time. When shooting with flash, generally choose 2 1DIN or film with higher sensitivity, so that not only the sensitivity index can be larger, but also its tolerance is large because of high sensitivity, which will not cause excessive contrast of the negative film.

In sports shooting, it is generally not suitable to use flash. Sports shooting is dynamic, so we should choose films with high speed sensitivity (such as 24DIN and 27DIN).

Generally speaking, stage photography should not use flash, but must use film with higher sensitivity.

Shooting portraits, still lifes and landscape photos requires rich layers, delicate silver lines, strong texture and pleasing colors. Try to use low-speed and medium-speed films.

2. Color film: Color film for photography includes color negative film and color reversal film.

(1) color negative film, which is the negative image of the original complementary color after being developed. Color negative film is mainly used to make color photos; And you can print and play black and white photos directly, but the level and contrast of photos are affected to some extent. The sensitivity of color negative film is much smaller than that of black and white film. The negative color deviation is caused by the influence of color temperature and surrounding environment when shooting, but different color filters can be used to correct it in photo production. Color negative film is one of the most widely used color films.

(2) Color reversal film, through the process of reversal development, can obtain the same color positive image as the subject. The color image, color reproduction and image clarity of color reversal film are better than those of color photos, and printing with color reversal film is better than that of color photos. Color reversal film, its color is true, bright and full. Strict requirements when shooting, small sensitivity and accurate exposure. If the exposure difference is 1/2 times, various colors, densities and layers will be obviously affected.