What is the solder tin paste?<br> 1. Solder tin paste is a new type of solder material that comes with SMT.<br> 2. Solder paste is a complex system that is made of a paste of solder powder, flux, and other additives.<br> 3. At the normal temperature, the solder tin paste has a certain viscosity, and the electronic component can be initially adhered to a predetermined position.<br> 4. At the soldering temperature, the soldered component and the printed circuit pad are soldered together(Permanent connection.) with the evaporation of the solvent and some additives.<br> Instructions:<br> 1. Before the opening, the temperature of the solder paste should be raised up to the ambient temperature (more than 25degC), and the temperature return time should be about 3-4 hours. It is forbidden to use other heaters to raise the temperature instantaneously.<br> 2. After the solder paste is opened, it is recommended to use it within 24 hours at room temperature.<br> 3. Placed in the air for a long time, the solder paste will become a tin block due to moisture absorption.<br> 4. The indoor temperature should be controlled at 22-28 degC, and the humidity RH30-60% is the best working environment.<br> 5. To wipe the wrong substrate, it is recommended to use industrial alcohol or industrial cleaner.