Water-based lubricant for metallographic sample preparation. Medium thick lubricating film. Aka-Lube Yellow can be used as a general purpose lubricant or where Aka-Lube Green is too aggressive. Recommended for a wide range of materials, as it offers a good combination of lubrication and cooling. Aka-Lube Yellow has properties that fall between Aka-Lube Green and Aka-Lube Red.