Table 149 – Overprinting behavior in the transparent imaging model

Source color space

Affected colour component of group colour space

Value of blend function B (c b , c s ) expressed as tint

OP false

OP true, OPM 0

OP true, OPM 1

DeviceCMYK, specified directly, not in a sampled image

C, M, Y, or K

c s

c s

c s if c s ≠ 0.0c b if c s = 0.0

Process colour component other than CMYK

c s

c s

c s

Spot colorant

c s (= 0.0)

c b

c b

Any process colour space (including other cases of DeviceCMYK)

Process colour component

c s

c s

c s

Spot colorant

c s (= 0.0)

c b

c b

Separation or DeviceN

Process colour component

c s (= 0.0)

c b

c b

Spot colorant named in source space

c s

c s

c s

Spot colorant not named in source space

c s (= 0.0)

c b

c b

A group (not an elementary object)

All colour components

c s

c s

c s