Stipples

• The whites are opaque, the solid blacks are clear glass, the intermediate tones showing the same values in stipples of various sizes. 佚名. 神奇的知识之书.
• The Benday process, so called, is the use of mechanical appliances for adding lines or stipples to either drawings or plates. 佚名. 神奇的知识之书.
• So fine are these stipples, however, that the picture is to the eye perfectly reproduced. Edward W. Byrn. 十九世纪发明进展.
• To illustrate this, the 150-line screen has 22,500 stipples to the square inch. 佚名. 神奇的知识之书.

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