Venture 5/16" Black Back Copper Foil
Black Back Copper Foil.
1.25 mil(31 microns) Thick
5/16 IN X 36 YDS(7.94 mm X 33 M)
Black coloring on adhesive(back) side of foil allows use on clear glass, etc. where a black patina is used on the soldered surface and a black finish is desired.