Adox MCP - Grades with Meopta Color3 head?

[grain11]

Hi there !

I have some trouble calibrating the new Adox MCP paper for my Analyser Pro.
I use the following filter Values on my Meopta Color 3:

Grade M Y
00 0 150
0 0 110
0.5 5 98
1 10 85
1.5 28 63
2 45 40
2.5 53 30
3 60 20
3.5 68 15
4 75 10
4.5 138 5
5 200 0


Using the above filter values I determined the exposure factors and contrast (R-values) for the Adox MCP paper.

Grade 00 0 1 2 3 4 5
Exposure -3 -2 -2 5 6 -6 -8
R 100 100 95 95 78 67 55



It seems I cannot reach grades below 2. Is it possible that the color head has bleached out filters? Or is this normal for the paper? Has someone also determined the contrast for the Adox MCP?

Thanks,

Johannes

 

[ic-racer]

How are you determining your ISO R values?

 

[grain11]

Adox MCP - Grades with Meopta Color3

How are you determining your ISO R values?

I used contact copies of a step tablet according to the Analyser Pro manual. The step tablet was contact printed to the paper. The print is then compared to to a light grey and a dark grey reference tile that came with the analyser and the R values calculated (difference of the dark and the light grey tone of the step wedge)
Since the grades 1 to 00 were unsatisfactory I increased the yellow filter values. Subsequently I repeated the step tablet calibration with results shown above. I did also some finetuning with the test stripe function of the analyser. I hope I followed the procedure correctly. However I am concerned that something my be wrong with the color head.

Johannes

 

[mikeg]

Have you tried the values for Agfa MCP?
From RH Designs website they are;

Offset 0 -2 -4 -5 -3 -6 -6
Contrast 168 140 123 105 85 69 65

When I tested Adox MCC I found the old Agfa MCC values were very close to the new Adox version.

Mike

 

[grain11]

Mike,

these were the starting values I used, but I never got that contrast with the filter settings suggested with the Meopta Color 3. So I tried to arrive at the "true" values for my system...

Johannes