There is a possibility of interaction between light stabilizers and heat stabilizers. Therefore, when selecting light stabilizers for PVC, the interaction between them and heat stabilizers should be considered. The application of light stabilizers must not affect the effect of heat stabilizers.

When benzophenone light stabilizers and barium-cadmium heat stabilizers are used together, soft PVC products will turn yellow; however, when the alkalinity of the barium/heat stabilizer is reduced, the yellowing phenomenon can be reduced. Benzo light stabilizers are very effective in improving the light stability of PVC, especially for rigid PVC. However, in rigid PVC, when certain benzo light stabilizers are used together with sulfide-based tin heat stabilizers, a pink complex will be formed.

When storing heat stabilizers, they should not be stacked overweight and high. They should be stored in stacks. The area of each stack should not be larger than 100 square meters. The distance between stacks should not be less than one meter. The distance between stacks and walls should not be less than 1 meter. The distance between stacks and beams and columns. Not less than 3 meters, the width of the main channel is not less than 2 meters, and the height of the stack is not more than 3 layers. Storage, loading and unloading must be carried out in strict accordance with the requirements of relevant standard manuals, and workers must wear labor protection equipment as required. Packaging bags must be strictly managed, one product must be used for one purpose, and mixing and mixing is strictly prohibited.