We are being asked many times what 4/4 or 4/1 actually means. Below you will find a short overview, which, of course, cannot claim to be comprehensive.
Colour
front side
back side
4/0
4 colours CMYK
nothing
4/1
4 colours CMYK
1 colour black
4/4
4 colours CMYK
4 colours CMYK
2/0
2 colours – black+HKS
nothing
1/0
1 colour – black or HKS
nothing
1/1
1 colour – [...]










