What is the specification for viewing conditions?

[michaelejahn]

Yep. That would be it. Defining viewing condition requirements, illuminant, CRI, metamerism index, surround, uniformity, etc.

Here are two documents ...

The ASTM 01729-96 Viewing Standard specifies the conditions for the critical visual color
appraisal for color matching.

ISO 3664:2000 - viewing standard for graphic arts

[Barry Brown]

Eric Dalton's article "New Lighting Standard" about ISO 3664:2009 was published by Printing Industries of America: The Magazine, August 8, 2009 (Copyright 2009 by the Printing Industries of America, Home | Printing Industries of America - Printing.org), and reprinted with permission in the Seybold Report Volume 9, Number 20. Octiober 26, 2009.
Eric Dalton is Vice President, JUST Normlicht Inc.
That article is worth reading.
regards,
Barry

[Barry Brown]

The attached press release just came in.......
"JUST NORMLICHT standardized lighting solutions have been certified by FOGRA based on the
ISO 3664:2000 P1 and P2 criteria."
regards, Barry