Product information "Sanding and Polishing Cloth"
White side to dull shiny patches on the surface, to clean plastic and varnished wood surfaces and to remove spray mist. Green side for polishing and to produce a gloss finish on matt surfaces.
https://www.koenignorthamerica.com/media/f1/11/3a/1695626614/411000_Sanding_and_PolishingCloth_Instr_2021-36_WEB.pdf