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Processing Colour Film Negatives

If you give the film you exposed to the photo processing facility it will contain the images that were not visible from the exposures you created. These images have to be amplified and stabilized to produce a color negative which is then printed and then viewed using reflected light.

Before we discuss the process of film developing near me of a photo negative in color, it is wise to take a step back and work on an image that is black and white. If you were using black-and white film for your camera, the same latent-image-formation process would have occurred, however, the silver-halide grains would be attracted to all visible light wavelengths rather than only blue, green or red light. When using black-and white film, the silver-halide grains are covered in only two or one layers which means that the process of developing is simpler to comprehend. What happens is:

In the beginning of the process the film, it is placed in the developing agent, which is actually an reducing agent. If it is allowed that the reducing agent is present, it will transform all silver ions into silver. For grains with latent-image sites will grow faster. If you can control temperatures, time, and agitation, the grains with latent images will transform into pure silver. The grains that are not exposed will continue as crystals with a silver-halide halide.

Next, you must finish the process of developing by washing the film in water or applying an “stop” bath to stop the process of development.

The unexposed crystals of silver-halide are removed by what is known as”fixing bath. This fixer only dissolves the crystals of silver-halide and leaves the silver metal in its place.

In the last step the film is cleaned by water to get rid of all processing chemicals. Film strips are then dried and then individual exposures are divided into negatives.

Once you’re finished with your work, you will are left with a negative of the scene. It is a negative image in the sense that it is the darkest (has the highest amount of silver atoms that are opaque) in the location which received the highest light exposure. In areas that did not receive light, the image has zero silver atoms and remains crystal clear. In order to create an image that appears like a normal image to us, it needs to be printed on another light-sensitive substrate (usually photo paper).

In this process of development magical binder gelatin played a crucial role. It expanded to allow chemicals used in the process to penetrate the silver-halide grains however, it remained in the correct position. The process of swelling is crucial to the movement of chemical and reaction products between the layers of the photographic film. As of now nobody has discovered an appropriate substitute for gelatin in photographic films.

Film Developing: Color

If your film was colored negative type (that will print upon return from the photo processing) the chemical processing process is different in many ways.

The development stage involves reducing chemicals, as the silver-halide particles transform into pure silver. Oxidized developer is created in this process. The developer that is oxidized reacts with the chemicals known as couplers in all of the layers that create images. The couplers’ reaction causes them to produce a color and the color will vary based on the manner in which the silver-halide grains were sensitized spectrally. The different color-forming couplers are utilized in the red sensitive, blue- and green-sensitive layers. The latent image of the different layers is formed into the dye in a different color as the film is created.

Layers that are sensitive to red create a cyan-colored dye.

The layers that are green-sensitive form a magenta dye.

Blue-sensitive layers are formed by yellow dye.

The process of development can be stopped through washing or the use of a stop bath. The unexposed silver-halide grains are eliminated by using a fixative solution. The silver which was created during the initial process is removed using bleaching chemicals.

A negative picture is cleaned to get rid of all of the chemicals or reaction product as is possible. These film strip are dried.

The color negatives that result look quite odd. In the first place, unlike a black-and-white negative, this one is not made of silver. Additionally, as an opposite color (negative) and negative, they exhibit a bizarre orange-yellow hue. They are color negative in that the higher the exposure to red and the greater the amount of the cyan dye forms. Cyan is a mixture of green and blue (or white and red). The overall orange hue is due to masking dyes that assist in eliminate imperfections in the process of reproduction of colors. The image layers with green sensitivities include magenta dye. the blue-sensitive layers of images contain yellow dye.

The colors created by colour negative films are built on the subtractive color formation method. The subtractive system utilizes only just one color (cyan magenta, yellow or cyan) to regulate every primary color. The additive system employs an amalgamation of green, red and blue to create an color. Television has an additive technology. It makes use of tiny dots of green, red and blue phosphor to create the colors. In a photo, the colors are layered over each other, which is why a subtractive method of color reproduction is needed.

The red color controls the color of Cyan dye
The green color can be controlled through Magenta dye
The blue dye is managed by Yellow dye