Information

Unique black and white workflow

We offer a specially developed printing process for black and white images which automatically converts the images into what are known as Duplex images. The black colour is refined with an additional grey, which intensifies the depth of the image and eliminates annoying colour casts.

Please convert your images for the Duplex method using one of the following methods in Photoshop:

  • For an RGB image, select → Image / Adjustments / Hue/Saturation / set saturation to -100.
    → Result: More depth/details, as a 3-channel image is calculated
  • For an RGB image, select → Image / Mode / Grayscale
    → Result: Less depth/details, as a 1-channel image is calculated
  • For a CMYK image, select → Image / Mode / Grayscale

If you want a saturated black, we recommend converting the black and white images into CMYK. Your black is composed in 4 colours, making it more saturated and stronger.
Black and white images based on colour systems (RGB or CMYK) tend to have a colour cast.
This can be counteracted by reducing saturation. The images (RGB only) are converted using our unique Duplex method.

If you would prefer a more open, grey black, we recommend converting the images to 1-colour black and white in Photoshop. 1-colour black has a more greyish look when printed and is less saturated than a black and white image in CMYK.

 

Black and white images

The following list shows how we handle or print black-and-white images in the PDF file:

  • Black and white images in CMYK channel → Printed in CMYK
  • Black and white images in CMYK channel → Printed in CMYK
  • Black and white images in greyscale → Printed in Duplex
  • Black and white images in RGB channel (all colour channels the same) → Printed in Duplex
  • Black and white images in RGB channel (all colour channels not the same) → Printed in CMYK
Tip from a colour professional:

Perception of colours on black and white pictures printed in 4 colours changes depending on the light source. So we recommend viewing the images in daylight or standard light. But you can achieve the best result with our special Duplex method.

 

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