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Ask an Expert - Forum > Crane Lettra 220lb Paper Thickness

Do you know the thickness of Crane's Lettra 110lb and 220lb paper in millimeters?
June 5, 2015 | Unregistered CommenterKristen
The 110lb (300gsm) is a 21pt thickness, and the 220lb (600gsm) is a 42pt thickness
June 5, 2015 | Unregistered CommenterIan Vincent
Does that convert to inches or millimeters?
June 5, 2015 | Unregistered CommenterKristen
pt is one thousandth of an inch, or .001". So 21pt is .021".

#110: .021", or .5334 mm
#220: .042", or 1.067 mm

Those are median tolerances and probably measure via a caliper which presses slightly into the grain of the paper until it flattens out.
June 14, 2015 | Unregistered CommenterMark