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 Dongguan Printing in Grand Rise, Printing in China, Asia for less can save 30%. Grand Rise Printing is a full service Lenticular Printing , Plastic(PVC, PP,PET)products and Paper Products Printing company in Dongguan China. Brief information about us: GR Printing is a China Printing Company providing Full UV Offset Printing Services of Plastic Printing and paper products. Printing product ranges from 3D Lenticular Card , Lenticular Sticker , 3D Images Painting , 3D Lenticular Box , Morphing Notebook , Flipping Bookmark , Zooming Logo , 3D Soft PVC Bag , Soft PVC Cover , PVC Cosmetic Bag , Plastic( PVC, PP,PET ) Box , Custom Color Box , Wine Box , Pop-ups Board Book, Children's Books printing , Magazines, Commercial Label , Greeting PostCards, Page-A-Day Calendars, Wall Calendars , NWire-O Books, Gift Box and etc. See our Products Pages for more informat...

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Printing Knowledge

label printing production experience

Stickers stickers in the daily life of the packaging is becoming increasingly important in the daily sticker label printing process we often encounter some of the more difficult problems, these problems if not timely and effective solution, not only will affect To the normal production, and may even cause some economic losses. I engaged in self-adhesive label printing for many years, summed up some of the printing production tips, in this wish to share with you



The tips in the process of plate making;

 
1. Shortening the exposure time, solve the problem of abrupt transition branch 
 
 
The author used to print a label have transition network effect of drugs, the customer request the effect of the transition network to softer, but proofing and printing out the transition network is stiff, cannot meet the needs of customers. The author observation after that, the smallest of the transition network node at about 3%, basically is embossed resin version can bask in the smallest network. If it will branches reduced to a film, plate burning is likely to be small dot leakage phenomenon, so can't to solve the problem by using the method of the film again. Because the embossed resin version is to rely on curing light imaging, so the author make plate making personnel shortening the exposure time, the resin version of the drying out of branches than normal exposure time of the network, after proofing again, transition network effects become soft, the customer satisfied with it, we have successfully completed the order. 
 
2. Back exposure area transition network a bit problem 
 
Familiar with flexo plate making process knows, flexographic plate-making process back exposure process, its purpose is to let the graphic version and base combined with more firmly. But probably many people don't know the back exposure process can also be applied to the embossed resin version of the plate making process. In daily production, we often have a large flat screen or large area transition network of live parts, in the process of plate burning often because of his bad exposure time grasp the small dot leakage problems, especially make plate of large area transition network, more strict to the requirement of exposure time: time is too long can paste version, the time is too short may be off site. At this point, can be used during plate back in the process of exposure, which accept exposure, on the back of resin version back exposure time according to different living a flexible control. Practice has proved that after back exposure treatment of resin plate on large area transition points when it is not easy to appear the phenomenon of network. 
 
In the process of printing tips; 
 
1. The printing light agent to remove white dots 
 
 
The author previously encountered such a problem: when printing a batch of urgent delivery of live parts, raw materials surface dust is too much, but since there is no time change the raw materials, and also ran out of dust cloth, cause when printing the white of large area. In order to solve this problem, the author adopted a way: not commonly used system of a field, the raw material on the surface of a printing of the UV light agent, and then according to normal process printing ink. Due to the first printing UV from light agent has to leave the dust sticky on the surface of the raw materials or override, back when the printing ink basically is not white spots. And, because the UV light agent were very light in color printing ink will not affect the behind of the hue. But doing so will greatly improve the production cost, thus can be used for emergency only, not as a conventional solutions. 
 
1. The printing light agent to remove white dots 
 
 
The author previously encountered such a problem: when printing a batch of urgent delivery of live parts, raw materials surface dust is too much, but since there is no time change the raw materials, and also ran out of dust cloth, cause when printing the white of large area. In order to solve this problem, the author adopted a way: not commonly used system of a field, the raw material on the surface of a printing of the UV light agent, and then according to normal process printing ink. Due to the first printing UV from light agent has to leave the dust sticky on the surface of the raw materials or override, back when the printing ink basically is not white spots. And, because the UV light agent were very light in color printing ink will not affect the behind of the hue. But doing so will greatly improve the production cost, thus can be used for emergency only, not as a conventional solutions. 
 
2. In addition to electrostatic interference 
 
The author also have encountered such a problem: the north some stickers printing factories winter film materials, frequently material rewinder not neat and printing machine operating system crash phenomenon. The factory USES is Lin type division LPM300 intermittent stickers printing machine, equipment performance is stable, but why the situation of the operating system crash? Later found that the "culprit" is produced during the printing film material amounts of static electricity. Due to electrostatic interference device operating system often freezes and does not work, but also lead to thin film material winding. But production task urgent at that time, no time on the equipment installed in addition to electrostatic device, so the author suggest that add a two humidifier in the workshop, to improve the workshop of relative humidity, greatly eliminate the electrostatic effect on the equipment and materials, the final production to run smoothly. 
 
3. Partial adjustment posted version of the double-sided adhesive thickness, achieve ideal printing effects 
 
In the non-drying label printing process often occur local printing color too deep or too shallow, at the moment can by adjusting the local version of the double-sided adhesive thickness method to solve, and do not need to back out of the film print. Particular way is: if the local printing color too deep, the region plate below the double-sided adhesive can be removed, equivalent to reduce the local printing pressure, printing color will be lighter. Likewise, if a local printing color too shallow, can be in the area of plate below to add a layer of tape, this is equivalent to increase the local printing pressure, printing color can be deepened. Adjustment by local pressure in this way, often can solve some problems and can avoid the trouble to film, plate making and also save the plate. 
 
4. In addition to press paper round mark opportunely 
 
In the non-drying label printing process, paper press paper round of tend to material extruding stain, factories are having to material widened (generally more than the actual printing width 10 mm), let the pressure roller pressure at the edge of the material, to avoid the marks in the surface of the finished product label. But this method is a waste of raw materials, in fact, the author recommended the pressure roller surface with a layer of adhesive material (paper, thin film materials, it is recommended to use PET material, best), can greatly reduce or even eliminate pressure impressions of the wheel on the material surface. After using this method, we can use the minimum width of raw material printing labels, greatly reducing the waste of raw materials. 


 
5. The solution of the coated paper foaming phenomenon 
 
There was a time, the author in the use of inclined back press printing in large area field label material foaming phenomenon. When the material is coated paper stickers, it is strange that bubble is in the adhesive material on the surface of material. The author also have ever had before material foaming phenomenon, but bubbles appear in between surface material of adhesive materials and adhesives, the phenomenon of blisters on the surface material or meet for the first time. Analysis was thought that the bubble is due to the adhesion force for separating surface material. Inclined back label printing in the printing field labels easy to generate large stickers phenomenon, the main reason is ink viscosity big or printing pressure. But if the ink is transferred to the state of thin, at the same time after printing to minimize the stress status, or occasionally, the phenomenon of the adhesive material surface bubbles. This shows that not only is ink and printing pressure problems, that there will be other what reason? Finally, the author found the reason, is the resin version of the deformation. Due to the resin version placed after a period of time will lose water and deformation, is usually characterized by around the middle sag, cock. When using a piece of the old resin version, such as plate if not used directly, after warm water immersion on the surface is flat, but in fact, around the low or middle, high. Inclined back label printing machine adopt the way of flatten is flat, so will cause printing layout center sag have very strong adhesion force, so that the surface material layer of adhesive materials. After understanding to this situation, the author will resin soak in warm water for a long time, the resin version of fully absorbing water to recover the original shape; Then computer printing and foaming phenomenon disappears. 
 
This article from dongguan grand rise www.lxpack.com finishing release printing. Above is in the many years' production practice of the author summarized some tips, hope to be able to help in the printing industry counterparts. Technology is the inheritance and development needs of communication, only in the same industry personnel, many exchanges, complement each other, pursuit, self-adhesive label printing technology can get good development and innovation. 
 
 



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