H'line stands for various terms. Discover the full forms, meanings, and possible interpretations of H'line across different fields and industries.
The smallest amount of visible space or the narrowest line that is displayable on a printed page. The size of a hairline depends on the materials, hardware, and software used or on the organizations involved. The United States Postal Service defines a hairline as 1/2 point (roughly 0.007 inch), whereas the Graphic Arts Technical Foundation (GATF) defines a hairline as 0.003 inch.
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