Mezzotintoing

from The Collaborative International Dictionary of English v.0.48

Mezzotinto \Mez`zo*tin"to\, v. t. [imp. & p. p. {Mezzotintoed};
   p. pr. & vb. n. {Mezzotintoing}.]
   To engrave in mezzotint; to represent by mezzotint.
   [1913 Webster]