1. Storage temperature and deadline: The tin paste should be sealed at a temperature of 5-10 ° C. The validity period is generally 6 months. 2. Save the tin paste after opening: The tin paste on the mesh board must be recovered by the clean and non -polluting empty bottle and stored separately in the refrigerated library cannot be mixed with the new tin paste. The preservation period should be scrapped to ensure the quality of the product. 3. When the tin paste that has not been used up before is used again, if you find that it is dry, you can add a small amount of tin paste to stir well and then use it before using it.