P-22 vs SMPTE-C phosphors for color correction? (cross-post, sorry)

[Zman]

what is the P-22? need more info please

[Jim Blokland]

Apparently it’s the type of Phosphor in the CRT. I’ve seen both types of monitor used in broadcast applications, but I’m wondering if there’s a significant difference in terms of using the monitor for color correction.

Thanks. JIM.

[Zman]

well I was a colorist for a number of years, and all of our monitors were C phosphors, and these are all sony or panasonic, mostly panasonic and very expensive

[Mitchji]

Hi,

For color correction you can save some money and get a montitor with P22.

I posted this question about a year ago and Philip Hodgetts who had researched this issue for a book on Color Correction responded as follows:

“P22 phosphors have relatively slow response times, contributing to ghosting, but that’s only compared to rare earth phosphors 🙂 in practice P22 *are* the SMPTE C phosphors. The color points set are P22 Red, P22 Green and P22 Blue.

They differ from the much earlier NTSC phosphor colors from 1953. Mostly in the green point.

Gee, not everything from 6 months research and writing on a color correction book was wasted. :)”

When asked for clarification he responded:
“There is no difference. Period. The SMPTE-C Phosphors have color points defined by the SMPTE society by P22 Red, P22 Green and P22 Blue. These are the standard phosphors. It is possible to get faster response times from rare earth phosphors but the color points have to be P22 Red, Green and Blue for them to be SMPTE-C.”

Best Wishes,

Mitch