If your company is using check-in printing and wants to print an image (such as a logo) on a wristband or badge, only images that are black and white will be accepted. This means there are only 100% pure black pixels. Colour and gray scale will not work on the printers which are 1 bit per pixel devices.
Tip: In photo-editing software, try converting the image to black and white and
and then applying a "Posterize" effect to reduce the colour graduations to the
lowest level possible.