A computer-generated image of the International Prototypekilogram (IPK), which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of 39.17 mm. The IPK is kept at the Bureau International des Poids et Mesures (International Bureau of Weights and Measures) in Sèvres on the outskirts of Paris.
The geometry of this computer model was based on the actual specifications being used for experiments in new manufacturing techniques to produce new kilogram mass standards.
Solid model and ray-traced image was created using
Cobalt CAD software.
This image was provided by the contributor because of the dearth of uncopyrighted photographs of the actual IPK. This is expected to be a chronic limitation given that…
the IPK is stored in a vault nearly all the time,
there is no general public access to the BIPM (and certainly none to the vault),
and working copies of the IPK are used at the BIPM for routine calibrations for years on-end.
Date
Uploaded August 10, 2007
Source
Originally uploaded to English Wikipedia as
CGKilogram.jpg
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19:00, August 10, 2007 . Greg L . 1400×1024 (535,748 bytes)
08:30, August 10, 2007 . Greg L . 1024×740 (128,856 bytes) (A computer-generated image of the international prototype of thekilogram, which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of [[1 E-2 m|39 )
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Change from absolutely absurd, crap job of lightening by previous editor. To that editor: Create a NEW file and use that if you like. Do not change this one.
{{Information |Description=A computer-generated image of the '''International Prototype''' '''kilogram''' (IPK), which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of 39.
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