Metals & Minerals – Black sheet metal
The black sheet is a flat surface of iron metal that is smooth and polished.The black sheet is the sheet of hot rolling.
Metals & Minerals – Pickling sheet
Pickling sheet(Sheets washed with acid) structurally something between a black sheet and a galvanized sheet. In the pickling process, impurities are removed and the sheet will ready to be galvanized. Pickling sheet is used, for the factories that galvanize the sheet and the factories that complete the process (such as dyeing) after producing the pieces.