Rubber coloring is a combination of theory and practice of technology, not only need to have the basic principles of coloring technology, but also need to be familiar with rubber processing and molding technology and skills. Empirical is very strong, the color itself will also continue to exercise and learn, have good resolution color, to do a comprehensive grasp different rubber, colour and lustre pigments and join all kinds of additives and the mutual capacitance and dispersion properties, known as pigments in the gel content, more want to get a comprehensive understanding of rubber products for environmental requirements of the pigment of domestic and foreign laws and regulations. Such as heavy metal content, polycyclic aromatic hydrocarbons content.

At present, most of the small and medium-sized rubber enterprises color matching, still use empirical visual method. This is an empirical trial-and-error method, although not very scientific, but simple and practical. It just takes a lot of time. As in the drafting and design of rubber color formula, a vast amount of coloured rubber sample collection, as far as possible to find out and ask for the phase approximation of color sample for reference, serious contrast observation, analysis of reference to a given standard color sample color, gloss, etc, the similarities and differences, and on the basis of reference formula, according to the actual need, the dosage of various kinds of colorant accordingly. So it takes a lot of time. With the development of science and historical progress, the application of type calculating machines for color matching has become increasingly popular. To replace the functions of the human eye and brain with spectrophotometers and other measuring instruments. The trial-and-error process of the color ratio is carried out through computer simulation, without the need for the rubber compound coloring mixing, the operator only needs to measure the reflectivity, that is, its standard value and select the colorant for color matching, by adjusting the concentration of the colorant ingredients, so that the measurement system and the standard conversion value. If the operator chooses the right rubber colorant, the system will output a formula as a mass fraction and then convert the percentage formula into a mass ratio. Using computer method, the whole process of coloring rubber formulation can be shortened within ten minutes.

In the process of rubber color matching, to select the varieties of pigments as simple as possible, to the second best don't use the three best color color, because the more varieties of paint to join, can cause "complementary", has dark color, especially for latex products such as colorful balloons, household gloves colorants, as far as possible need not the three best color, bright brightness so as not to lose. At the same time, rubber color matching pigment should pay attention to the selection of similar varieties of heat resistance, in order to avoid too much difference in heat stability, temperature changes in the vulcanization process will cause color changes. Latex colorants should also consider the color of alkali resistance and dispersion.

Rubber color, is one of the rubber products production indispensable link, the technical and empirical is very strong, need long-term practice and accumulation, best color version of the sample database should be established and used for a variety of paint colorants and with good color rubber samples are production and use of colored rubber, to step for record respectively, so as to control used in the future, Try to reduce the color difference of different batches of colored rubber in the same formula. Although the rubber color matching technology is complex, as long as we have a serious and rigorous working attitude, and learn and understand all kinds of pigment colorant performance, add dosage and rubber compatibility and dispersity, and environmental protection and safety, do more tests, will fully master the rubber color matching technology.