hugowolf Offline Upload & Sell: Off
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ben egbert wrote:
In the US, 8x11.5 is A size, each doubling goes up a size, B, C, D E until you get to J size. At least in mechanical engineering drafting papers. Each size can be expressed in terms of A-units.
The European system always confused me because "A" means something else.
It isnft just European, it is international: used practically everywhere outside of north and parts of central America.
The system works pretty much the way drafting and architectural paper sizing works in the US, except instead of letters, each numerical unit increase denotes a halving of the paper. A1 is half of A0, and A2 is half of A1, etc.
The main thing about the international paper sizing is the retention of the aspect ratio through out the range. Cut a sheet in half, and it has exactly the same aspect ratio as before.
All A and B papers have an aspect ratio of sqrt(2):1 (approximately 1.4 to 1) which is very close to the standard 35 mm film ratio of 1.5 to 1. A sized papers are sold retail, B sized papers are used within the printing industry. C sized paper products are used mostly for packaging A and B sized papers: envelopes, for example.
Brian A
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