What Photoshop fill for 18% grey card?

Started Dec 16, 2005 | Discussions thread
Petruska Veteran Member • Posts: 8,938
It's sad when "Xrite" tells you....

Iliah Borg wrote:

Petruska wrote:

I measured the #23 patch (supposed to be the 18% gray)

It's close to 9% gray. You can use Y100 to read percents.

As pixelgenius notes in https://www.dpreview.com/forums/post/64158780 - 18% gray is close to L 50% in Lab.

that patch #23 is 18% gray!!!

I wish that I had their ColorChecker Passport 2 to see what the large gray panel is.

What is Y100?

Bob P.

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