What Photoshop fill for 18% grey card?

Started Dec 16, 2005 | Discussions thread
pixelgenius
pixelgenius Senior Member • Posts: 4,224
What does "Xrite" tells you....
1

Petruska wrote:

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 cannot find anywhere that X-rite states it is.

They do show this:

https://xritephoto.com/ph_product_overview.aspx?ID=820&Action=support&SupportID=5159

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