Atramentizing is another term for phosphating and part of the rust protection concept.
Atramentizing alone, however, usually does not provide sufficient corrosion protection to keep the pliers rust-free for a long time. It is perfectly normal for this layer to wear away permanently in the area of the cutting edge. The phosphate layer is an excellent primer for a lacquer layer applied over it.
86 02 250
Pliers wrench
Pliers and wrench in one tool