According to the ink manufacture and use requirements, for the manufacture of high quality ink grade dyes must have the following properties:
1 high ecological standards ( safety );
2 in the aqueous ink having high chroma and solubility;
3 colors;
4 the high surface tension;
5 low viscosity;
6 extremely low chlorine and sulfate content ( low corrosive);
7.Ca, Mg, Fe ion content for ppm (lower precipitation );
8 does not contain heavy metals ( with EN71 / 3 standard);
9 high light fastness.
The quality requirements of the dye, ink is a high purity salt ( low salt ) dye, to such high requirements for the use of conventional chemical, physical method is difficult to do. On the dye desalting, impurity removal, membrane separation technology with high efficiency and energy saving advantages, is a very economic and advanced technology. In the early 80 century, some well-known international companies have dye using large-scale film classification system. In recent years, membrane separation technology has been extended to almost all of the world in the production of dyes, the relevant departments, enterprises are studied, using membrane separation technology to produce water soluble dyestuffs, the use of membrane separation technology to produce inorganic salt content < 0.5%, storage stability, meet the requirements of manufacturing special dye ink.
Dye ink technology development:
Although a variety of water soluble black dyes such as acid black, black, black and other direct activity can be used to make black ink, but taking into account the ink on paper the firmness and due to low solubility of dyes caused by ink is not stable wait for a problem, early black ink ( ink ) long by direct black dyes.
These dyes are used for dyeing textile raw areas, specially in the purification processing reaches a certain pear indicators for ink manufacturing. Although can be used to meet the general requirements, but as a result of the structure and other reasons, some properties such as solubility, water resistance, oxidation resistance, heat resistance, storage stability and the color, brightness and so on performance is not up to the requirements of high performance ink. In order to improve the shortcomings, Chinese auspicious Industrial Company Limited laboratory technicians in the original dye structure on the basis of the modification, the development of a variety of dyes. Such as pure blue, crystal blue black ink, dye neutral in the stability, water resistance, oxidation resistance, heat resistance and the brightness and so on properties and pigment ink without distinction.
With the social progress and technology development, the writing and printing of text and picture requirements are also rising. In order to meet the needs of new types of ink, black dyes are constantly being developed. High performance new structure dye and purification technology has become the focus of research and development of special dye ink, but also can produce high quality ink, pen and ink in the area to maintain the leading position key.
Over by the Chinese auspicious Industrial Limited
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