Color cast in B&W

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i getting color cast when have b&w images printed. can see effect when soft-proof, don't know how correct it.

i have images in srgb hue/saturation changes have no effect.

suggestions appreciated.

thanks.

> getting color cast when have b&w images printed

printed how? inkjet? offset?

> can see effect when soft-proof

is color cast same in soft proof print? calibrated, color-managed, etc?

(edit)
one more question: info palette readings file. b/w, readings tones should r=g=b.


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