Film switch ink should be how to choose?

Film switch ink should be how to choose?

1. Connecting material Connecting material is commonly known as ink oil. It is the main component of film switch ink, plays the role of dispersive pigment, so that the ink has the appropriate adhesion, mobility and transfer function, and through film forming the pigment fixed on the printed matter after the appearance. The bonding material can be made of various substances, such as various dry vegetable oils, most of which can be used as ink bonding materials, mineral oils can also be used as bonding materials, solvents and water, and various resins can be used as bonding materials.

Ink rheology, viscosity, neutral, acid value, color, water resistance and printing function mainly depend on the connection material, the same pigment, using different connection materials, can be made of different types of ink; Same bonding material, using different pigments. Using the same type of ink, because can not change the function of the ink base, so the quality of the film switch ink, in addition to the pigment related, mainly depends on the connection material.

2, the packaging is white, transparent, translucent or not bright powdery substance. The first is the fill effect. Appropriate selection of filler can reduce the amount of pigment, reduce the cost, and adjust the thin film switch ink thickness, fluidity and other properties, improve the flexibility of formula planning.

3, with the feeding is in the film switch ink production, as well as in the printing use, in order to improve the function of the ink itself and some additional information. According to the basic composition of ink preparation, in some characteristics can not meet the requirements, or because of the change of conditions, and can not meet the requirements of printing use, need to use some auxiliary things to solve. Such as: desiccant, desiccant, thinner, viscose removal agent, plasticizer and so on.

4, the pigment in the film switch ink plays a coloring role, it directly affects some of the characteristics of the ink.

Pigments are colored, black or white highly dispersed powders that are insoluble in water and organic solvents. Inorganic pigments are non-ferrous metal oxides, or some metal insoluble metal salts, inorganic pigments are divided into natural inorganic pigments and artificial inorganic pigments, natural inorganic pigments are mineral pigments; Organic pigments are organic compounds that have colors and are also divided into natural and ingredient categories. Now commonly used is the composition of organic pigments, organic pigments are a wide variety, the color is relatively complete, the function is better than inorganic pigments.

The pigment used for printing ink requires very high requirements, especially chroma, dispersion, light resistance, transparency, etc., which requires the color of the pigment to be close to the spectral color, and the saturation should be as large as possible. Magenta, blue, yellow pigment used in the ink transparency needs to be relatively high color

. All pigments should not only be resistant to water, but also be quickly and evenly combined with the connecting material. The oil absorption capacity of pigment should not be too large, with alkali resistance, acid resistance, alcohol resistance and potential oil resistance.