The output of the Carbon 100 profile, before linearizing, is
straight line. The profile may be linearized with a curve in the K, as in CURVE_K
=, or the profile can be linearized with the LINEARIZE command, using either a
spectrophotometer or densitometer, as in the attached profile. In fact, one
method can be used over the other to allow for a general profile and specific
ones for variations on the process.
Unless you have a densitometer or a spectrophotometer you should just delete the LINEARIZE command for your tests, and the linearize with the CURVE_K= line, which would in the Carbon 100 profile have the same function as GRAY_CURVE= in partionned profiles like those in the guides of Ron Reeder and Clay Harman.
I am somewhat surprised that your profile gave such a high density range that all of the steps up to 50% are pure white. But this could be explained by Cyan being a high UV blocker in your set-up.
Sandy