As a coloring agent, this element between iron & nickel on the periodic table will literally give you the blues
It is almost pure metal  iron with a few per cent of nickel  polished by the... [DOC] [TLE] material selection - FTP Directory Listing [PAR] electrical voltage, and biological agents such as molds, insects, .... product are 
crucial; is the polymer off color or does it have an odor?