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A blend between two gradients whose matching stops are tints of one spot swatch kept the link and interpolated the tint, but every step's stop lost the process inks (C, M, Y, K) printed with the spot ink, so PDF export wrote the steps as the spot ink alone. - Matching stops linked to one swatch interpolate each process ink with the tint; a stop without process inks counts as none of each, and the ends keep their own. - Gradients with different stop counts keep the inks at every resampled stop, interpolated with the midpoint-adjusted fraction between two stops of one swatch. - A solid blended with a gradient brings no process inks of its own: its stand-in gradient no longer copies the other gradient's. Stops of different swatches, or linked and unlinked stops, still blend into unlinked process colors without plates.