-Crayon manner: a manner of etching in which the ground is perforated with various needles, roulettes, or mattoirs to produce the effect of crayon or chalk drawing on print.
-Pastel manner: a method of color printing using multiple plates engraved in the crayon-manner.
-Chalk: a prepared natural stone or earth substance.
Maybe you should try to rub it with acetone?
Answer:
he did it in the year 1962...
