The Best Micron for Rosin? 36, 72, 90 or 115?
Jan 30, 2020· LPI is lines per inch, which is the same as U.S. Mesh. In real world applications in the United States, silk screen may be sold simply as 155 mesh. This would be the same as calling it 155 lines per inch, or 155 U.S. Mesh. A micron is equal to one twenty-five thouh (1/25,000) of an inch, or one millionth (1/1,000,000) of a meter.