1. Ink color: most pictures and texts on plastic products are displayed by color, so it is very important to detect ink color.
The color difference of the same color ink should be as small as possible, the purity should be high, and the batch and batch are similar. The method to detect the ink color is: naked eye observation, that is, the standard color ink and the ink to be tested are coated on the scraping paper, and then the difference is judged by comparison; the specific values of hue, saturation and lightness can be measured by colorimeter detection.
2. Ink viscosity: ink is a viscous fluid, flow will produce internal friction, this resistance is viscosity. Viscosity and ink cohesion, fluidity, adhesion and so on. It can be measured by outflow viscometer (must be at the specified temperature): put a certain amount of ink into the specified metal cup, let the ink flow out from the special hole at the bottom of the cup, and get the viscosity value according to the time required for all the ink to flow out. If the time of ink flow is short, the viscosity is small (generally expressed in seconds).
3. Thixotropy of ink: the pigment particles are evenly dispersed in the binder. Due to the polar contact between the pigment and the binder, the surface of the pigment will form a charged layer, which will attract each other after static for a period of time, and the ink will thicken and the viscosity will increase. When there is an external force (such as stirring), the flocculation state is quickly destroyed, the ink thinning viscosity is smaller, this property is the thixotropy of ink. The more irregular the shape of pigment particles and the more content of pigment particles, the greater the thixotropy of ink; the more binder, the smaller the thixotropy. The smaller the thixotropy, the better.
4. Ink adhesion (adhesion): when the ink is separated between two objects, it shows the performance of anti splitting resistance. Generally, the greater the viscosity, the greater the degree of adhesion. In the process of printing, the adhesion has three main effects: affecting the transfer rate of the ink; affecting the overprint of the ink. If the adhesion is too small, the ink printed in the back can not stick to the previous ink, so that the overprint can not be carried out smoothly; for high-speed printing, if the adhesion is too small, it is easy to splash ink. Adhesion can be measured by ink tension meter.
5. Viscoelasticity of ink: the viscosity of liquid and elasticity of solid in printing process. With the ink in the type of binder, external force (such as stirring) time. When the action time of external force is long, the ink shows viscosity like liquid; on the contrary, when the action time of external force is short, the ink mainly shows elasticity. It can be expressed by the drawing length of ink.
6. Ink dryness: refers to the ink transferred to the substrate, fixed to form a hard ink film performance. In the printing process, the product rubbing dirty, blocking plate and other faults are related to this performance. Commonly used ink fixation time (can be measured by pressure fixation method) and drying time (measured by volatile drying method).
7. Ink fineness: indicates the size of pigment and auxiliary material particles and their distribution uniformity in the binder. And coloring materials, auxiliary materials and particle size and ink grinding. Generally, the fineness of inorganic pigments is worse than that of organic pigments; the more rolling times, the more adequate grinding, and the more evenly dispersed in the binder, the better the fineness is. It can be expressed quantitatively by fineness meter and qualitatively judged by naked eye observation.
8. Coloring power of ink: it is determined by the amount of pigment contained in the ink, the dispersion of pigment, and the selective reflection of pigment to light wave. More pigments and better dispersibility will result in strong coloring power. Strong coloring ink, printing color bright, bright and less ink. The coloring force is a relative value.
9. Ink resistance: mainly including weather resistance, light resistance, heat resistance, cooking resistance, friction resistance, folding resistance, acid resistance, alkali resistance, organic solvent resistance, plasticizer resistance, smooth agent resistance, oil resistance, and other chemicals resistance.
10. Ink transparency: the level of gravure printing is achieved by the superposition of gravure ink. According to the principle of color superposition, the transparency of ink is better, and the addition of solid particles, especially insoluble in organic solvents, must be added. The particle fineness should be close to the wavelength of light, so that the light transmission will not be blocked. If the fineness is not enough, the line can not diffraction around the solid particles, resulting in poor transparency.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.

We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.