This Tag can be used to find you the Contast of your liking, this combination is the house standard and can be found in many variations and takes hardness up to 61 hrc after tempering. 1.2842/02 being the darkest and best coffee etchable steel used in my MvH damast,75ni8/15n20 with 1.8% Nickel is the standard for the etch resistant layers with gives you the black/bright contrast. for more contrast try the Tags ni4% ni36% and ni99.8%