There are three main technological features of Neem. The three processes are: screen printing, thermal transfer and flexographic printing.
1. Screen printing: Screen printing is to stretch silk fabric, synthetic fiber fabric or metal mesh on the frame, and make screen printing by hand-painting film or photochemical plate making. The modern screen printing technology uses a photosensitive material to make a screen printing plate by photolithography (so that the screen hole of the graphic portion on the screen printing plate is a through hole, and the non-graphic portion of the wire mesh hole is blocked. live). During printing, the ink is transferred to the substrate through the mesh of the graphic portion by the extrusion of the squeegee to form the same graphic as the original. The advantages of screen printing are strong color fastness, small length and width restrictions, and rich colors.
2, thermal transfer: thermal transfer is an emerging printing process, imported from abroad for more than 10 years. The printing method of the process is divided into two parts: transfer film printing and transfer processing. The transfer film printing adopts dot printing (resolution up to 300 dpi), and the pattern is pre-printed on the surface of the film. The printed pattern is rich in layers, colorful, and ever-changing. The color difference is small, the reproducibility is good, the effect of designing the pattern can be achieved, and it is suitable for mass production; the transfer processing is transferred to the product through a heat transfer machine (heating and pressing) to transfer the delicate pattern on the transfer film. Surface, after molding, the ink layer is integrated with the surface of the product, which is realistic and beautiful, greatly improving the grade of the product.
3. Flexographic printing: Flexography, also often referred to as flexographic printing, is a printing method that uses a flexographic plate to transfer ink through an anilox roller. For flexographic printing, the printing plate is generally made of a photosensitive resin plate having a thickness of 1-5 mm. Ink is divided into three categories, namely water-based inks, alcohol-soluble inks, and UV inks. Since the ink used in flexographic printing is environmentally friendly, it has been widely used in food packaging printing and has a bright future.
Compared with gravure, offset and traditional embossing, flexographic printing has its own distinctive features: High production efficiency: Flexographic printing uses a roll material that not only enables double-sided printing of substrates, but also enables Complete the work of connecting the line (or film), bronzing, die cutting, waste discharge, and winding. The production cycle has been greatly shortened, manpower, material resources and financial resources have been saved, production costs have been reduced, and economic benefits have been improved. The range of printing materials is wide, such as paper, plastic film, aluminum foil, self-adhesive paper and so on.
The quality of the printed matter is good, the printing precision can reach 150 lines/inch, and the printed matter is rich in layers, the color is clear, and the visual effect is good, which is especially suitable for the requirements of packaging and printing.
Environmental protection: It adopts new water-based inks and solvent-based inks. It is non-toxic and non-polluting. It fully meets the requirements of green environmental protection and can also meet the requirements of food packaging.
Good economic efficiency: The flexo press uses a roll-type material that can be used online with many post-press equipment, greatly reducing cycle times. Flexographic printing costs only 10%-20% of gravure, consumes 1/3 less ink than gravure, saves 40%, and rejects only 1%-2%, lower than gravure and offset. Production costs.