Most refer to leaking as red or white or some color being in the plumage and the color is not wanted in the plumage. The extended black allele is the only E locus allele that should leak non-black. All of the other E locus alleles should show red or white produced by the silver or gold alleles. Black birds should be Extended black, gold or silver and a melanizer or two to make sure no silver or gold leaks through the hackles etc.
Tim
Tim

