Long press the QR code to follow, Customize your exclusive packaging
There are always irregular silk threads on the blank space of the packaging bag, this problem must be taken seriously!
Release time:2019-08-28
Irregular streaks in the blank areas of packaging bags usually appear as intermittent, irregularly long or short ink marks, often relatively thick. Shunxingyuan Packaging, a professional flexible packaging manufacturer, mainly explains this phenomenon from three points: foreign matter adhering to the doctor blade edge or under the blade, insufficient ink circulation, and ink fatigue, and provides solutions.
Irregular streaking in the blank areas of packaging bags usually manifests as intermittent, irregular ink lines of varying lengths, often quite thick. Shun Xing Yuan Packaging, a professional flexible packaging manufacturer, explains this phenomenon from three main points: foreign matter adhering to the doctor blade edge or under the blade, insufficient ink circulation, and ink fatigue, and provides solutions.
1. Foreign matter adhering to the doctor blade edge or under the blade
During the printing process, the doctor blade can be moved back and forth, up and down, to dislodge adhering foreign matter, or a bamboo stick can be used to directly remove it from the doctor blade edge (this must be done by a skilled operator to avoid unnecessary losses due to improper operation). If necessary, the machine should be stopped for a thorough cleaning of the doctor blade.
2. Insufficient ink circulation
Some ink in the dead corners of the ink fountain, due to insufficient circulation, causes resin precipitation, forming crystals and clumps of various sizes, or excessive drying on the surface forms ink film (ink film is prone to appear in summer, while ink crystallization and clumping are more common in spring and autumn due to temperature influences). As the ink circulates, some ink crystals or ink film are carried by the rotating plate cylinder to the blade, where the doctor blade breaks them, forming irregular streaks.
Therefore, improvements must be made in both ink circulation and filtration.
1. Circulation Improvement
Method 1: Tilt the ink fountain left and right to ensure that ink can be injected from the slightly higher end and flow out from the lower end, forming good circulation.
Method 2: Place the ink fountain flat, but the ink must be injected simultaneously from both ends and returned from the middle; this also creates good circulation. Do not inject ink from only one side.
2. Filtration Improvement
Ink must be initially filtered before use, even new ink needs filtering. Generally, a 140 mesh/inch filter screen is used.
The method is to place a stocking below the ink outlet to form a filter sleeve. After filtering for a period, if the filter screen is blocked and ink flow is poor, small holes can be poked above the sleeve with a bamboo stick to enhance ink guiding. The lower part of the sleeve can also serve well for impurity sedimentation.
3. Ink Fatigue
This situation often occurs when the inking area of the printing plate is relatively small. During the printing process, the resin in the ink is continuously consumed. If solvent is continuously added without adding new ink, the resin is not replenished, which changes the proportion of the ink's components, leading to ink fatigue and affecting normal use. This can be resolved by appropriately adding new ink.
Related Information
Proper use of food packaging bags
Nowadays, many food products are packaged in plastic bags, mainly for convenience and hygiene. However, for consumers, understanding the materials of food packaging bags is also a keyword. Below, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will give you a detailed introduction to the material identification methods of food packaging bags.
What types of clothing packaging bags are there? What is their scope of application?
Generally speaking, clothing packaging bags are mainly made of PE, PO, PP and other materials, and are widely used in shirt, knitting, clothing, textile and other industries. They are mainly used to package clothes and display brand image products, so clothing packaging bags are also a good advertising platform.
What is a gusseted bag? What are the benefits of using gusseted bags?
With the continuous development of the times, people's consumption concepts are also constantly changing, and people's pursuit of quality of life is also constantly improving. Taking food as an example, the quality of food packaging bags directly affects consumers' desire to buy. A beautiful and exquisite food packaging bag can instantly improve the grade of the product itself and add value to the product. Below, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will analyze what an eight-side sealed bag is and what are the advantages of an eight-side sealed bag?
Tel：+86769-87930196
Mobile：+86135-4929-7179
Fax：+86769-87930197
Website：https://www.dgsunpak.cn/
Address: No. 3, Yuanfeng Road, Hengtang Community, Tangxia Town, Dongguan City
Scan to identify and follow:
Scan code to follow and consult