The quality of print products is related to the survival and development of each company. The quality of products depends on the five major production factors in the production process: Man, Machine, Material, Method, and Environment. That is, we often say 4MIE rules. As the domestic plastic color printing manufacturers vary greatly in scale and grade, the emphasis on the 4MIE rule and actual implementation are not the same.
Due to the limitation of financial strength, for most small and medium-sized plastic color printing plants, it is relatively easy to shut down good printing materials and reduce the quality of accidents from the source. In the plastic color printing process, the raw materials are mainly films, inks and solvents.
The overall principle of quality control: according to the customer's specific requirements or the characteristics of the contents of the package, post-processing to determine the appropriate film and structure; after selecting the material structure, according to different films to determine the appropriate ink, and supporting the corresponding Solvent; avoid excessive packaging or shoddy.
There are many types of films on the market today, but the most commonly used printing films are BOPP, NY, PET, and PE. In terms of printing, the most important thing is of course the effect of the surface treatment of the film, and whether the NY film is damp. When printing, the process requirements for measuring the surface tension of the film should be established. The corona effect has timeliness. If it is left for a long time, the corona effect may be reduced too much to meet the printing requirements. It is also possible to avoid the hidden troubles caused by inadvertently reversing the film surface.
PE film is the focus of our attention: when the film is blown, there may be a film roll that is missing the corona treatment; the film thickness is too large or uneven to cause the corona effect to be insufficient; the blown film is added with too much of a smoothing agent or high Excessive proportion of sliding granules causes a significant reduction in corona effects. When the corona effects on both sides of the 12-15 um PET film are not much different, it is easy to cause the back failure of the printed film roll.
The corona requirements of the printing film: BOPP, PE ≥ 38 dynes, PET ≥ 50 dynes, NY ≥ 52 dynes. NY film does not have a great effect on the corona effect after absorbing water. It is judged whether the NY film absorbs water to see if the film is shrinking. If a film is cut into the oven for a few hours, whether it feels hard or not, if there is a tendency Hard hair, etc., the NY film absorbs too much water.
In the procurement of film must explain to the supplier the use of the film and requirements, and now thin film species refinement, light said PET, NY, BOPP name, suppliers may have several varieties, but not necessarily all suitable.
When selecting a gravure ink, first consider several factors: What substrate is printed on? What kind of machine is used to print? What kind of effect do you want to get? Post-printing processing, end product use conditions? Now ink manufacturers have fierce competition and have a large selection of products. They may also dazzle our color printing plants and confirm the above points before printing. We choose the ink with the best cost performance ratio and reduce or avoid the occurrence of printing failures. .
The ink supplier should not be too much, not more than three should be appropriate, different brands of ink can not be used due to blending, resulting in a large waste of the remaining ink; perhaps some color printing manufacturers hold the mind of the ink supplier's mentality, but the business should be Integrity-based, because it is necessary to pay sooner or later, there is no such need. (To be continued)
Due to the limitation of financial strength, for most small and medium-sized plastic color printing plants, it is relatively easy to shut down good printing materials and reduce the quality of accidents from the source. In the plastic color printing process, the raw materials are mainly films, inks and solvents.
The overall principle of quality control: according to the customer's specific requirements or the characteristics of the contents of the package, post-processing to determine the appropriate film and structure; after selecting the material structure, according to different films to determine the appropriate ink, and supporting the corresponding Solvent; avoid excessive packaging or shoddy.
There are many types of films on the market today, but the most commonly used printing films are BOPP, NY, PET, and PE. In terms of printing, the most important thing is of course the effect of the surface treatment of the film, and whether the NY film is damp. When printing, the process requirements for measuring the surface tension of the film should be established. The corona effect has timeliness. If it is left for a long time, the corona effect may be reduced too much to meet the printing requirements. It is also possible to avoid the hidden troubles caused by inadvertently reversing the film surface.
PE film is the focus of our attention: when the film is blown, there may be a film roll that is missing the corona treatment; the film thickness is too large or uneven to cause the corona effect to be insufficient; the blown film is added with too much of a smoothing agent or high Excessive proportion of sliding granules causes a significant reduction in corona effects. When the corona effects on both sides of the 12-15 um PET film are not much different, it is easy to cause the back failure of the printed film roll.
The corona requirements of the printing film: BOPP, PE ≥ 38 dynes, PET ≥ 50 dynes, NY ≥ 52 dynes. NY film does not have a great effect on the corona effect after absorbing water. It is judged whether the NY film absorbs water to see if the film is shrinking. If a film is cut into the oven for a few hours, whether it feels hard or not, if there is a tendency Hard hair, etc., the NY film absorbs too much water.
In the procurement of film must explain to the supplier the use of the film and requirements, and now thin film species refinement, light said PET, NY, BOPP name, suppliers may have several varieties, but not necessarily all suitable.
When selecting a gravure ink, first consider several factors: What substrate is printed on? What kind of machine is used to print? What kind of effect do you want to get? Post-printing processing, end product use conditions? Now ink manufacturers have fierce competition and have a large selection of products. They may also dazzle our color printing plants and confirm the above points before printing. We choose the ink with the best cost performance ratio and reduce or avoid the occurrence of printing failures. .
The ink supplier should not be too much, not more than three should be appropriate, different brands of ink can not be used due to blending, resulting in a large waste of the remaining ink; perhaps some color printing manufacturers hold the mind of the ink supplier's mentality, but the business should be Integrity-based, because it is necessary to pay sooner or later, there is no such need. (To be continued)
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