Although barium sulfate is almost completely inert, zinc sulfide degrades upon exposure to UV light, leading to darkening of the pigment. The severity of this UV reaction is dependent on a combination of two factors; how much zinc sulfide makes up the pigments formulation, and its total accumulated UV exposure. Depending on these factors the pigment itself can vary in shade over time, ranging from pure white all the way to grey or even black. To suppress this effect, a dopant may be used, such as a small amount of cobalt salts, which would be added to the formulation. This process creates cobalt-doped zinc sulfide. The cobalt salts help to stabilize zinc sulfide so it will not have as severe a reaction to UV exposure.
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2025-08-15 07:27
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It is recommended to replace the wiper seal every 6 to 12 months, depending on usage and environmental conditions It is recommended to replace the wiper seal every 6 to 12 months, depending on usage and environmental conditions
Additionally, it is recommended to purchase high-quality seal kits from reputable manufacturers to ensure their durability and effectiveness Additionally, it is recommended to purchase high-quality seal kits from reputable manufacturers to ensure their durability and effectiveness
Dust seals are crucial for preventing wear and tear caused by solid contaminants, while oil seals are necessary for maintaining the integrity of lubrication systems Dust seals are crucial for preventing wear and tear caused by solid contaminants, while oil seals are necessary for maintaining the integrity of lubrication systems