Digital BW, The Print

Hello,

I am confused about how file data of  equal brightness values are 
translated to the target profile. I assumed that the file data range 
of 255 brightness levels  would have to be translated through the 100 
L* distinctions in the proifle connexion space. Yet I can see 
brightness distinctions on the screen from RGB 1 to RGB 9 which 
should all translate to L*1 . When I first noticed this I thought it 
was possible BPC was using the RGB data to remap the brightness 
higher,  but I notice the same the thing much farther up the curve. 
My monitor regesters a distinction between RGB 72 and RGB 73 ( L* 30) 
which is maintained after converting to a target space. For example 
in us 
swop coated v2   66%, 60% 58% 42% and  66% 59% 58% 41%, which both 
translate as L*30.

I have just taken the experiment all the way to the print to remove 
any file to monitor anomalies. I printed a chart in a 2.2 RVB space 
of all 255 levels contained in blocks of L*. So for example in the L* 
1 patch there were inner patches containing RGB values from 1 to 13, 
the L*54 patch containing RGB 128 & 129, etc. I printed out the chart 
on the widest range output I have (Epson 3800 on Museo silver rag) 
using an eye one colour profile. 

When the print was coming out of the printer I breathed a sigh of 
relief because,  from a distance and under normal light all L* 
patches appear uniform. However when I bring the print up very close 
under powerful light, some L*patches seem to contain very, very faint 
ghostly appearances of the inner patches. Either the data got through 
to the control signals of my printer or they are the results of badly 
digested bits of beef. 

This phenomenon seriously challenges my understanding of colour 
management

Any help out of the rabbit hole would be greatly appreciated.

Eugene Appert.