Topic
#grey card
Articles about grey card from the Abdohoo.App Solutions blog and help centre.
Guides Shadecard
Grey card vs white paper for colour correction
Both give the camera a known neutral to correct white balance and brightness. White paper is free and good enough for everyday work; an 18% grey card is more consistent and clips less.
Capturing colour Shadecard
White paper, grey card or colour chart? Choosing a reference
White paper is the everyday reference and unlocks shade plus recipe. An 18% grey card is more reliable. A 24-patch colour chart gives full colour correction. No card: family only.