Hydra version is different from alcohol moisturizing
We are a big printing company in Shenzhen China . We offer all book publications, hardcover book printing, papercover book printing, hardcover notebook, sprial book printing, saddle stiching book printing, booklet printing,packaging box, calendars, all kinds of PVC, product brochures, notes, Children's book, stickers, all kinds of special paper color printing products, game cardand so on.
For more information please visit
http://www.joyful-printing.com. ENG only
http://www.joyful-printing.net
http://www.joyful-printing.org
email: 860681365@qq.com
People in the printing industry know that it can be summarized as: hydrating version and alcohol dampening.
Hydra version: As the name implies, water is the main ingredient, auxiliary material: wetting powder.
Alcohol dampening: the main ingredient is still water, auxiliary materials: dampening solution and alcohol.
Alcohol: Ethanol, used in printing as isopropanol, its main function is to reduce the surface tension of moisture.
Moisturizing version: water, moisturizing powder, iron stick (water rubber sleeve); alcohol dampening: water, dampening solution, alcohol, rubber-based water gel
The sleek version of the machine is suitable for low speed products with relatively low print quality requirements. Its advantages are: saving materials, environmental protection, and low air pollution to the workshop.
The alcohol dampening machine is suitable for high-speed products with relatively high quality print quality. Its advantages are: print dots are full, images are realistic, and ink is easy to balance.
Moisturizing version: the water-proof rubber sleeve needs to be covered with water rubber sleeve, and the water rubber sleeve functions: 1. Reduce the impact and friction between the water glue stick and the plate cylinder, 2. Make the water evenly coated on the surface of the printing plate, 3 Effectively absorb excess moisture from the surface of the plate. Here I suggest that the water gel sleeve should be made of chemical fiber, and the reason is not explained.
Alcohol dampening: relying on the version of water gel as rubber texture, its role: 1, better than the water gel sleeve to reduce the impact and friction between the plate cylinder and the water roller, 2, so that the water is evenly coated on the plate . Because it is a rubber texture, the deformation amount is larger than that of the water rubber sleeve, and it can effectively squeeze out excess moisture on the surface of the printing plate. However, if it is used in a high-speed machine, what about the residual moisture on the plate? For this problem, our great inventor came up with a way to remove the residual moisture on the plate directly—that is, add alcohol (isopropyl alcohol) because the alcohol is volatile, so when the machine is running at high speed, the water is coated. After the cloth is placed on the plate, the volatilization of the alcohol will take away the residual moisture of the plate to better achieve the ink balance.
Summarize the role of induction aids:
Wetting powder: makes the water fine and can make water form a water film on the surface of the printing plate. The ultimate goal is to keep the ink and water in balance. Disadvantages: In the case of uneven mixing, a small amount of powder can not be fully dissolved, hurting the printing plate. Remember: Do not put more.
Dampening solution: Makes the water fine and can make the water form a water film on the surface of the printing plate. The ultimate goal is to keep the ink and water in balance. Disadvantages: The price is too expensive and the printing cost is too high.
Opportunity, emergency skills revealed:
If the wetting powder is used up, it is night, nowhere to buy, you can use pure water, the machine can adapt to the water without wet powder in a short time. If the water rubber sleeve is damaged, it is also in the evening. You can use the sewing thread to make up. If it is dirty, you can remove it and wash it with gasoline and water. It is best to use a brush to brush the surface. Do not use a cleaning ball to wash the brush.
If the dampening solution is used up at night, you can use the moisturizing powder instead. If the alcohol is used up, you can use white wine instead. It is best to use Erguotou, Lanshuanggou and Gaogou Daqu.