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Re: [Phys-l] Pound mass or weight?



The 92 bright means that it reflects 92% of the visible light that hits the surface.

20 lb. means 20 pounds for 500 sheets of a specified size, 75 gsm is 75 grams per square meter

Anthony Lapinski wrote:
Our school gets reams of "Aspen 30" paper. On the outer cover are these
numbers:

92 BRIGHT (What does this mean?)
20 lb. 75 gsm/10 M (What does this mean?)
500 Sheets
8.5 x 11


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