When using the gray card, you set the white balance manually on the camera. Next, you choose your first product to photograph. Then you take a photo with the gray card(s) fully in view and set the white balance so that the gray card has the most correct color. After this, you can remove the gray card in subsequent photos. As long as you don’t change the arrangement of the light, you don’t need to use the gray card again. You can then choose to post-process all the images in a photo editing program such as Photoshop and make sure that the gray card in the photo is really gray, which means that all the other colors will also be correct.
- Card dimensions: 8.5 × 5.5 cm