Additive color process

ADDITIVE COLOR PROCESS. An early system of color imagery in which the color synthesis is obtained by the addition of colors one to another in the form of light rather than as colorants. This color addition may take place (1) by the simultaneous projection of two or more (usually three) color images onto a screen, (2) by the projection of the color images in rapid succession onto a screen or (3) by viewing minutely divided juxtaposed coloi images. 

Recently, requirements for pigments have been made in the additive color process, in which the three primary colors are blue, green and yellow. A good example is the color filter used in liquid crystal displays. In this field of applications, dyes are being replaced with pigments to improve the light fastness. 

Polaroid additive color screen silver transfer process Super-8 film 35-mm films... 

Polaroid introduced Polavision, a Super-8-mm instant motion picture system, in 1977 (97). Polachrome CS 35-mm sHde film followed in 1982 (98), and a high contrast version, Polachrome HCP, appeared in 1987. Each of the films comprises a very fine additive color screen and an integral silver image transfer film. The Polavision system, which included a movie camera and a player that processed the exposed film and projected the movie, is no longer on the market. The Polavision film was provided in a sealed cassette, and the film was exposed, processed, viewed, and rewound for further viewing without leaving the cassette (97). 

Individual size polymers may be used alone or in combination with one another and their performance may be further improved by the addition of other components such as waxes and lubricants. However, whilst sizing offers many benefits in the subsequent weaving of the yarns, it is anathema as far as wet processing is concerned. A typical sized yarn may contain as much as 34% of impurities, distributed as shown in Figure 10.15. These impurities can interfere with wetting-out and with bleaching. They may also affect coloration processes. Depending on the type of size and the dyes used, dye uptake may be increased or resisted ... 

The E center is an electron trapped at a negative Cl vacant site. These centers can be created in NaCl by irradiation or by additive coloration, as shown in the next chapter (Section 6.5). The band at 443 nm corresponds to a certain concentration, iV, of E centers that have been introduced by the irradiation process. The other band peaking at about 280 nm is related to other types of color center (which are formed by F center aggregation), beyond the scope of this example. 

This section discusses the regulation of food additives, colors, and sweeteners in the EU that are subject to three separate Directives. Three important aspects of the approval process for food additives in the EU are that (i) there is a technological need for their use (ii) they are not misleading to the consumer and (iii) they present no health hazard to the consumer (22). The EU Web site contains detailed information for the use of food additives and should be consulted for food additive information (23). 

By varying the design of the process section, additional simultaneous processing tasks, such as stabilizing, coloring, mixing-in of plasticizers, filtration, and pelletizing are possible. 

In practice, there are many sources of error apart from the inaccuracies of theory. In addition, there is human error, measurement error, batch variation of the colorants, and the nonreproducibility of the coloration process itself [2], Once a process is under control, the next step is to apply color formulation software. It has been shown that many of the past methods have not proven to be completely viable for the variety of color applications encountered today. 

Basic Colorant and Additive Production Processes A Regulatory... 

In addition to the multitude of OSHA requirements listed in 29 CFR, Sections 1903, 1904, and 1910 (Subparts A-Z), that apply to all industries in general, the following sections of 29 CFR 1910 have particular impact on colorant and additive manufacturing processes. 

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