Half tone

n.	1.	(Fine Arts) An intermediate or middle tone in a painting, engraving, photograph, etc.; a middle tint, neither very dark nor very light.
	2.	(Music) A half step.
	3.	A print obtained by the half-tone photo-engraving process.
	4.	the etched plate used to reproduce a half-tone illustration.

half tone

half tone:

see photoengravingphotoengraving,
photomechanical process in the graphic arts, used principally for reproducing illustrations. The subject is photographed, and the image is recorded on a sensitized metal plate, which is then etched in an acid bath.
..... Click the link for more information. ; printingprinting,
means of producing reproductions of written material or images in multiple copies. There are four traditional types of printing: relief printing (with which this article is mainly concerned), intaglio, lithography, and screen process printing.
..... Click the link for more information. .

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