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How did the halftone process change the use of photographs in newspapers and magazines?

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Alfred Stieglitz: Child with Striped Dress (Younger Raab Child) — History of photography *Child with Striped Dress (Younger Raab Child)*, autochrome photograph by Alfred Stieglitz, 1907; in the Art Institute of Chicago.

Before the development of the halftone process, it was impossible to reproduce the full range of gray tones in photographs using letterpress printing, as the process could only apply a uniform layer of ink.1

The halftone process revolutionized newspapers and magazines by allowing for the reproduction of photographs through the creation of an optical illusion. By breaking an image into a series of dots of varying sizes, the process controls the amount of ink deposited in a specific area, effectively simulating shades of gray.1

This innovation fundamentally changed print media by enabling:
* Tonal Depth: Publishers could finally print images with intermediate tones rather than just solid black and white.1
* Standardized Quality: By using screens with specific line frequencies—typically 50 to 85 lines per inch for newspapers and 100 to 150 for magazines—printers could optimize image clarity based on the quality of the paper stock.23
* Visual Journalism: The ability to mass-produce detailed photographs transformed how news and features were presented, making visual storytelling a staple of modern journalism.13