... metal wire drawing processing, drawing fast, the Silk Road clear, effective, no residue, no black. Of zinc alloy, ... wire drawing parts, need to select the soft round of the drawing, so as not to pull the ... , the general hardness is usually the drawing round 5P; and chose thicker coating hardness for the ... sand for the 5P or 7P No. 240 # round the drawing. For aluminum products, recommend the use of ...