7.9 Extend Problem 7.8 for additional in-gamut nodes (say, seven gray targets with L* of 25–90, in steps of 10 with a*¼b*¼0) along the neutral axis. If the nodes are not in-gamut change the L* values so that they are inside the printer’s gamut. Change nominal CMYK values and simulate the converge performance.

Do you still see near zero convergence error? Restrict the K separation using K-restricted function of Equation 7.90 and simulate converge performance with 3-to-3 control loop. What do you see?