Selection and use of ink for gravure printing
September 21 21:01:09, 2024
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In the planning of gravure printing, from which aspects to consider to select the ink that meets the requirements, which conditions must be guaranteed, this is the first problem that each printing factory solves. Here are some explanations on these contents.
First, choose the five factors of ink:
The first five factors need to be set:
1. Printed Body: What substrate is printed on?
2. Printing conditions: What kind of machine is used to print, how much is the printing speed?
3. Printing effect: What kind of effect do you expect?
4. Processing conditions: how to process the printed matter after printing?
5. Purpose: What kind of use is the final product used for?
It is important to confirm these points before printing, and to select appropriate inks to prevent future failures.
1. The type of printed body is the most important factor in determining the type of ink used. Even the same type is often different due to the variety and grade. Therefore, the following points need to be investigated as closely as possible:
1 Type of printed material (composition of material).
2 product name (manufacturer).
Grade 3 (thickness, anti-static agent, and other additives).
4 Is there any pre-processing or processing method?
5 printing surface.
2. Printing conditions 1 The ability and location of the drying device.
2 printing speed.
3 version of the shape, number of lines.
4 How many colors and printing orders are printed?
5 temperature conditions in the printing shop.
6 There is no preheater, cooler operation. The drying speed of the ink is affected by various conditions such as the printing press and the environment, and it becomes a cause of unstable printing effect and a cause of birth defects. Such cases are sometimes encountered during the printing process.
3. Printing effect.
1 Color 2 Density 3 Transparency, Cover 4 Gloss, Matte 5 Whether or not to overlap Print 6 Print or Print 7 Whether or not to add a glossy print.
In addition, depending on the type of ink to be selected, restrictions are imposed on the use, durability, and the like of the printed matter, so that the desired printing effect may not be obtained. Therefore, this should also be considered as one of the factors of product quality.
4. Processing Conditions Most prints and finished products become finished products after a single process. The processing conditions of this process must be judged to be suitable for the character of the ink. This is an important link to ensure product quality. The compatibility with the binder in the composite processing, the composite strength, the heat resistance of the heat sealer, and the like are closely related to the type of ink (ie, the resin in the binder), and need to be tested and investigated first. Another example is the boil-resistance boil-resistance, the distillation-sterilization distillability, and the like, in addition to the type of ink, and the durability of the pigment used in the ink.
In addition to these processes, there are various processing methods. When these processes are performed, various processing machines (composite machines, heat sealers, embossing machines, etc.) and various materials for processing (such as AC agents) are used. , adhesives, waxes, etc.) all need to be fully investigated beforehand regarding the type of processing machine, the types, characteristics, and methods of use of various materials.
5. Purpose Before printing, it is necessary to investigate clearly what kind of state the print will eventually become. For what purpose? What are the various patience requirements for their use? What are the conditions? In these respects, if you do not fully negotiate with your customers in advance, you may have serious problems (such as compensation for finished products or contents). Pay special attention.
For example, the alkali resistance and water resistance of soap packaging, the oil resistance of oily food packaging, the odorlessness and non-toxicity of fast food packaging, the cold resistance of frozen dessert packaging, etc. are all related to the resin properties of ink and the tolerance of pigments. Experiments and investigations. According to the above five factors, first select the appropriate ink type, and then determine the specific color, in this regard, you need to contact the ink manufacturer to obtain detailed information in order to achieve the most suitable ink for printing.
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