Fourth, characters, marking materials
Characters and markings are used to print on one or both sides of a printed board. These symbols are used for component assembly and repair. After screen printing, it requires clear marking, beautiful color, three-dimensional, chemical solvent and chemical resistance, good heat resistance, adhesion and insulation, and resistance to tin-lead alloy solder. The color is mainly white, divided into two major categories of thermosetting and photosetting.
As with solder masks, most of the single-panels use photo-curing. The double-sided and multilayer boards are thermoset. The main technical indicators and operating processes such as the ratio of the main agent and auxiliary agent, the curing time and temperature, and the film forming characteristics, the storage period of the printing material, etc., are basically the same as the corresponding type of the solder resist printing material.
With an experience of over 30 years, Helper created a new subsidiary who produce bakery and pastry making machines which is applied in the processing of noodles, dumpling, pancake, bread, biscuits, Saqima, hamburgers, pizza, steamed buns, etc. Reliable quality and many patent technologies make Helper`s equipment success in this particular market. Made of stainless steel and meeting all health and hygiene standards is the principle of Helper`s machine designing.
Bakery Making Machines,Fresh Noodle Production Line,Vegetable Processing Machines,Pastry Making Machines
Helper Machinery Group Co., Ltd. , https://www.helperfoodtek.com