The so-called "ink crystallization" refers to the improper control of the printing interval between two colors of ink, the first printing ink has dried solid before the ink is overprinted. Due to the low viscosity of the dry ink layer and the poor wetting of the ink, it is difficult for the next color ink to adhere thereto. In general, this phenomenon occurs in the ink overprint of a monochrome offset printing press. In order to avoid ink crystallization failure, the ink layer that is printed first generally must have the following conditions:
(1) Maintaining a certain degree of wettability, it can be wetted and adhered by the ink after printing.
(2) Maintaining a certain degree of tackiness, and the adhesion of the ink after printing is greater than the cohesion of the ink after printing.
(3) Control the amount of desiccant (dry oil) used. If there is a problem with the “ink crystallization†printing process, the surface of the printing ink may be rubbed with fine gauze to make the surface of the ink film rough, and the capillary suction force is increased to increase the ink overprint effect. For the “ink crystallization†printing products with large printing format and large batch volume, it is best to superimpose the high-viscosity oil varnish on the surface of the ink, and use its strong adsorption to adhere to the dry ink layer, and then use it. For the media, the post-printing ink adheres well.
[Case 2-11]: A factory uses a monochrome offset press to print 100,000 floral calendars. The pattern is a red peony with 128g/m2 double copper. The ink is fast-drying. When the yellow and the magenta were printed, when sky blue was overprinted, many blue inks were found to be difficult to adhere to. [Case Analysis]: This is a typical “ink crystallization†phenomenon. The reasons for this phenomenon are: First, the paper used is poor in ink absorption, the second is the use of quick-drying light, and the third is the amount of white paper . Therefore, in view of this situation, special attention should be paid to the proper control of the amount of white paper to be delivered by the single-color offset printing press, and the appropriate color conversion sequence. Treatment method: Because of the large number of prints, it was necessary to cover the oil once before printing. Remember that you must plan well when you next print.
Outdoor sofa is a kind of furniture for people to rest, relax and entertain in the outdoors. They are usually made of durable materials that can withstand the effects of various climatic conditions. The classification of outdoor sofas is mainly based on materials, design and function.
First, material classification:
1. Wooden outdoor sofa: This type of outdoor sofa is usually made of natural wood, such as teak. They are naturally beautiful and durable, suitable for outdoor Spaces such as gardens and terraces.
2. Metal outdoor sofa: This type of outdoor sofa is usually made of metal materials, such as iron, aluminum, etc. They have the characteristics of corrosion resistance, water resistance, sun protection, suitable for the beach, swimming pool and other humid environment.
3. Artificial materials outdoor sofa: This kind of outdoor sofa is usually made of artificial materials, such as plastic, artificial wood and so on. They have the characteristics of light, easy to clean, suitable for outdoor restaurants, cafes and other commercial places.
Ii. Design classification:
1. Single outdoor sofa: This kind of outdoor sofa is simple in design and suitable for single use. They are usually small and lightweight, suitable for small balconies, garden corners and other places where space is limited.
2. Double outdoor sofa: This kind of outdoor sofa is designed to be comfortable and suitable for two people. They are usually more spacious and suitable for placing in larger Spaces such as terraces and courtyards.
3. Multi-person outdoor sofa: This type of outdoor sofa is spacious and suitable for multi-person use. They often function as a sofa bed and can be used as a makeshift bed. Suitable for outdoor banquet area, holiday villa and other large outdoor space.
Iii. Functional classification:
1. Leisure outdoor sofa: This kind of outdoor sofa design is comfortable, suitable for people to relax in the outdoors. They are usually equipped with soft cushions and cushions to provide comfortable support.
2. Dining outdoor sofa: This type of outdoor sofa is designed for outdoor dining, such as open-air restaurants, cafes, etc. They are usually equipped with a dining table and chairs, providing a convenient dining experience.
Of course, a variety of different sofas can also be freely combined into a sofa combination to meet your different needs.
Rattan Sofa,Teak Sofa,Anti-Water Sofa,Sunscreen Sofa
Foshan Shengshi Zhihui Technology Co., Ltd. , https://www.officer-furniture.com