If you want to use a pure gray scale image in your photo product, you should prepare it accordingly.
- Your image should have the color space sRGB or Adobe RGB (1998), please do not send us pictures in the color space "Gray Gamma X.X"
- If your images are in the color space Gray Gamma, please convert the image to sRGB, as described below
- Please ensure that the color values in your black and white image are consistent in the color space sRGB
Example: A pure white should have the color values R 255 G 255 B 255. A medium gray should have the color values R 150 G 150 B 150. If you have a deviation, such as R 150 G 152 B 151, there may be color blemishes in the production of your photo.
Correct color values
Color chart of the final photo
If you have an RGB image where the gray scale values differ (example: R 150 G 152 B 151), proceed as follows (example: Photoshop)
- Open Photoshop
- Open your Photo
- "Edit" > "Convert to profile", select "Grayscale workspace - Gray Gamma 2.2" as the target color space and confirm with "OK"
- Now the picture is a pure gray scale image
- "Edit" > "Convert to profile" with the target color space "sRGB IEC61966-2.1" and confirm with "OK".
- Save your file as jpg and paste it into your photo
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