1. Select the ink according to the printing materials: For example, transparent printing ink must be selected when printing sheet aluminium film; for printing BOPP film and composite aluminium plating, lithographic transparent (composite) printing ink should be selected. Therefore, it can be said that the type of printing material determines the type of ink used, even if it is the same kind of film material, it often varies according to the type and grade. In addition, it should be noted that when printing with transparent ink, the white backing is usually not used under the color scheme, because the white matting effect will greatly reduce its application effect and value. Relatively speaking, the color case of transparent ink printing is thinner than that of the center with white ink backing.
2. Choose transparent ink according to the sample provided by customers: the choice of transparent ink includes color and luster. If you want to distribute spot-color transparent ink, you must consult the consumer supplier because the distribution of spot-color transparent ink is different from ordinary spot-color ink, and its difficulty is obviously higher than that of opaque ink.
3. Choose the appropriate transparent ink according to the practical situation and use of packaging: such as high temperature resistance, sunshine resistance, permeability resistance and other parameters of packaging printing, which must be included in the scope of choice. In addition, transparent ink printing can not achieve high brightness and bright color without aluminium coating or aluminium foil paper, aluminium foil and other information, because transparent ink has high transparency and aluminium coating composite or directly printed to the above information will change to show the luster and color of metal, so that yellow, green, red effect is better.
Usually, transparent ink has developed transparent golden, transparent yellow, transparent light blue phase and many other.
And transparent golden yellow is even more shining if it is combined on the aluminium coating: because of its high transparency, transparent golden yellow is often used in self-matching gold, and can also be lined with gold powder. According to customer's request, we can choose and distribute the golden ink such as gold powder, tuning oil and transparent golden yellow in a ratio of 1:3:2, which not only glows golden, but also greatly strengthens its adhesion. At present, transparent ink is mainly used to print bright flowers and gifts such as ribbons and ribbons. These wrapping papers are made of transparent ink (red, yellow, green, blue, etc.) imprinted with aluminium or with aluminium-plated film to stop printing. They are mono-viscous film. The inner layer of transparent printing ink is compounded with aluminized film to make soft packaging bags or small inner bag conjunctiva after printing aluminized film, all of which belong to more than two layers and are widely used in food and gymnastics industry. In addition, transparent ink is used to print high-grade packaging prints such as cartons, cartons and New Year pictures, which are made by Aluminizing and then returning to paper. The prints have the advantages of waterproof and moisture-proof. The anti-counterfeiting effect can be improved by printing anti-counterfeiting materials with transparent ink and then printing with laser holographic film. At the same time, the appearance is colorful and glorious. In order to achieve the best effect, transparent inks are not necessarily used in the design, but only partially printed with transparent inks, which can achieve better results. Transparent ink is a kind of dry special ink. Because of its different formulation, the application method of transparent ink is different from that of ordinary ink.
Transparent ink must be stirred before printing. If transparent ink is comparable to cold winter printing, it is not suitable to add too much diluent because of its low drilling, the drilling should be controlled in 18-22 seconds and 3 cups. Then the angle of scraper and the pressure of the impression cylinder and the distance between the scraper and the impression point should be adjusted according to the depth of the plate.
If the solvent mismatch is not properly controlled or the process operation is wrong, it is very likely to cause many problems, so every link can not be sloppy.
Removal of Common Faults in Transparent Ink Printing
Transparent ink in the flexible packaging printing process, the use of aluminum film or aluminum foil backing to improve printing and visual effects. But in the process of practical application, some quality phenomena often occur, such as pitting and uneven ink spreading after transparent ink printing, which greatly reduces its expected effect. Therefore, we should be familiar with the nature and printing characteristics of transparent ink, and analyze and remove them.
With the summary of Jinan picture album printing, I hope it will be helpful to our customers. If you don't understand or ask for help, please click on our official website: http://www.jnurs.com or call for consultation. We will try our best to solve it for you.