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What should be paid attention to when using solder paste?

What should be paid attention to when using solder paste?

Precautions.
1 Scraper should always be cleaned with alcohol, and it is forbidden to mix in the deteriorated solder paste.
2 solder paste is prohibited from heating.
3 Do not mix air when the solder paste is stirred.
4 solder paste can not be directly blown by the wind when used.
5 When the solder paste type is changed, the solder paste around the scraper and the printing template should be cleaned to prevent the dissimilar solder paste from being mixed.
6 Considering factors such as oxidation, moisture absorption, flux deterioration, viscosity change, foreign matter mixing, etc., the solder paste to be used should be strictly confirmed in the series of processes of printing, mounting, and reflow soldering.

Feb-15-2019

FASTPCBA