Halftone

ハーフトーン（網点） / 1880s– / Technique / Print Expression

Halftone converts continuous tone into regularly spaced dots of changing size so it can be printed; from a distance they return to tone, while enlargement reveals the screen as material.

Large and small dots on one fixed pitch / Light and shade made by dot area / Rosettes from differently angled color screens / An image that changes between normal and magnified viewing

Halftone — AI-generated interpretation — AI-generated interpretation, not a reference work

Dictionary entry

Best used for: Printing photographs in newspapers, magazines and packaging with limited inks · Using enlarged dots to make reproduction and print itself the subject
Type: Choose bold type or simple contours that survive conversion into dots.
Composition: Place normal-scale image and enlarged screen together to exploit changes in viewing distance.
Material: Set line frequency, dot shape, screen angle and ink color, then translate tone into dot area.
Caution: Polka dots are not halftone. Dot size must carry continuous tone in relation to printing resolution.
Further study: AM and FM halftone / Screen angle and rosette / Photomechanical reproduction

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