sorry, just replied without looking at previous entries.
When I used my old densitometer, I got better results with zeroed-out density values, that is, I measured my step wedges and zeroed-out to paper white.
Now I'm using a spectrophotometer and I obtain LAB values, like this:
93.9321
91.4298
88.1817
83.4927
78.2883
71.3222
65.4938
60.6404
54.9781
49.7342
44.4122
39.0966
34.6358
30.5362
26.4416
22.1175
19.0314
15.7048
12.0409
9.3780
7.6883
Is there any way to zero-out these values to convert the lightest value from 93.9321 to 100 and the darkest from 7.6883 to 0?
Thanks for any advice
Sidney