How to determine the effective usage period of leaded solder paste? A brief discussion.

Leaded solder paste is a perishable product. For electronic manufacturers, it is crucial to determine its correct and effective usage date, as it affects the quality of electronic products. Today, the solder paste manufacturer will talk about how to determine the effective service life of leaded solder paste:

Even though some people may think that solder paste usually has a specified expiration date when shipped from the manufacturer, which is generally six months from the date of production and processing. Yes, this is indeed the case under normal circumstances. However, like various other perishable products, the true shelf life of lead-containing solder paste depends on the storage time and temperature of the solder paste. In reality, it may be longer or shorter than the expiration date indicated on the label.

Perhaps before opening a bottle of solder paste and noticing that its color is rather dull, one should pay attention to whether the solder paste is about to expire (of course, there are also some solder pastes that are inherently darker in color). The storage and disposal of solder paste have long been particularly important in surface mount production and processing for reducing defects and process variables. In fact, success has been achieved in screen printing technology and new solder paste formulations. It is particularly important to monitor and control its shelf life. The solder paste distribution chain is composed of many elements. During this process, from the solder paste manufacturer to the screen printing operator, such elements play a role in controlling the exposure time and temperature of the solder paste. Manipulating such a chain can be a severe test. A model that truly converts the control of different elements in the solder paste distribution chain into the actual control of all solder paste storage containers should be a solution. The usage time on the solder paste container/Temperature labels can even improve the storage and disposal of solder paste.

This method can be referred to by everyone. It might be rather difficult for most enterprises to implement. However, the expiration of solder paste is only a small part of the phenomenon. In most cases, the ones we useThere is lead solder pasteThey are all used within the valid usage period.