Waddaya mean, NOT triple plated?
Triple plated is one of those terms tossed about but rarely understood. I havent heard of a chrome process that ISNT triple.
Step one is a copper plate, much like bondo over sheet metal, to fill in any low spots.
Step two is the nickel plate, which gives the bumper its color, like paint.
Step three is the actual chrome plating, which similar to clearcoat.