Digital BW, The Print

Thanks for the response Paul,

I've included the data I used to try and create the ICC. I believe
it's in the correct order. 

Gray    Lab_L
0.00    99
5.00    95
10.00   91
15.00   87
20.00   83
25.00   79
30.00   74
35.00   70
40.00   66
45.00   63
50.00   59
60.00   51
65.00   47
70.00   43
75.00   38
80.00   35
85.00   31
90.00   26
95.00   20   
100.00  14