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Color variation of greases
It is common for the color of greases to have variation between batches or lots and packages after the manufacturing process.
There are several factors that cause this variation.

First, it is very common for hydrocarbon-based greases to have color variations. This is typically caused by the hydrocarbon oils used in the manufacturing of the grease. The colors of the oils will have some variation which will also change the color of the final grease product.

Secondly are the additive packages in the formulation. Anti-oxidants are used to improve the resistance to oxidation of grease and can create a color variation. Anti-oxidants can vary the grease color during the manufacturing process and over time. When exposed to air, sunlight, UV Light or temperature the color of the grease may change as well.