I inserted your LINEARIZE numbers into a profile and installed it. What it shows is that you have a long straight curve, but with a very abrupt toe and shoulder. The linearize will probably correct enough to make a print, but I would suggest that before you try to do so you should work on your process in printing the step wedge to make it more linear in the toe and in the shoulder.
To correct, basically what you need to do is increase density in the very low shadow areas of the negative (increase exposure time by about 10%-20%) and increase density in the highlights (increase the default level of the PK, Y and LLK by about +5% to +10%) to give you a negative with a higher density range. Then print the step wedge again with no curve.
BTW, in a profile of this type where all curves follow the K the gray highlight, gray shadow and gray gamma have no impact on the slop, but you must have something in there for the profile to install. If you have nothing, the program will place these numbers, so I just include them myself.
GRAY_HIGHLIGHT=4
GRAY_SHADOW=4
GRAY_GAMMA= 1
I am attaching another profile that was linearized with a spectro to give you some idea of the kind of differentiation you need to see in the LINEARIZE numbers for a decent profile. The lower the number the closer you are to paper white, the higher the number the higher the reflection density range, and ideally there should be a fairly even differentiation between all of the values.
Sandy
#PRINTER=Quad4880
#CURVE_NAME= Carbon100 #Based on Carbon Tissue #238, 7 grams/liter of Cal Tint II Lampblack with tissue coated to a wet height of 0.9mm.
#Profile when printing a step wedge gives a DR (density range) of approximately log 2.25.
#With Tissue #238 sensitize with a 2% potassium dichromate solution, diluted 1+1 with acetone, approximately 10 ml per 8X10 sheet, applied in two coatings with a roller. 750 ULF units.
GRAPH_CURVE=YES
N_OF_INKS=8
DEFAULT_INK_LIMIT=100
LIMIT_K=26
LIMIT_C=1
LIMIT_M=1
LIMIT_Y=31
LIMIT_LC=1
LIMIT_LM=1
LIMIT_LK=44
LIMIT_LLK=1
GRAY_HIGHLIGHT=4
GRAY_SHADOW=4
GRAY_GAMMA= 1
CURVE_K= "0;0 100;100"
COPY_CURVE_C=K
COPY_CURVE_M=K
COPY_CURVE_Y=K
COPY_CURVE_LC=K
COPY_CURVE_LM=K
COPY_CURVE_LK=K
COPY_CURVE_LLK=K
LINEARIZE="18.17 19.66 21.26 23.06 25.42 28.09 30.8 33.51 36.66 39.83 43.05 46.73 50.84 54.32 58.67 63.18 68.3 75.2 84.72 90.98 93.35"
I am attaching another profile that was linearized with a spectro to give you some idea of the kind of differentiation you need to see in the LINEARIZE numbers for a decent profile. The lower the number the closer you are to paper white, the higher the number the higher the reflection density range, and ideally there should be a fairly even differentiation between all of the values.
Sandy
#PRINTER=Quad4880
#CURVE_NAME= Carbon100 #Based on Carbon Tissue #238, 7 grams/liter of Cal Tint II Lampblack with tissue coated to a wet height of 0.9mm.
#Profile when printing a step wedge gives a DR (density range) of approximately log 2.25.
#With Tissue #238 sensitize with a 2% potassium dichromate solution, diluted 1+1 with acetone, approximately 10 ml per 8X10 sheet, applied in two coatings with a roller. 750 ULF units.
GRAPH_CURVE=YES
N_OF_INKS=8
DEFAULT_INK_LIMIT=100
LIMIT_K=26
LIMIT_C=1
LIMIT_M=1
LIMIT_Y=31
LIMIT_LC=1
LIMIT_LM=1
LIMIT_LK=44
LIMIT_LLK=1
GRAY_HIGHLIGHT=4
GRAY_SHADOW=4
GRAY_GAMMA= 1
CURVE_K= "0;0 100;100"
COPY_CURVE_C=K
COPY_CURVE_M=K
COPY_CURVE_Y=K
COPY_CURVE_LC=K
COPY_CURVE_LM=K
COPY_CURVE_LK=K
COPY_CURVE_LLK=K
LINEARIZE="18.17 19.66 21.26 23.06 25.42 28.09 30.8 33.51 36.66 39.83 43.05 46.73 50.84 54.32 58.67 63.18 68.3 75.2 84.72 90.98 93.35"