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amanda.poole
06-05-2013, 08:20 AM
I need to calibrate our 901 so that the screen% is correct. When we print out a graduated screen test, we see that at 70% and higher we have solid black. How do I calibrate so that a 70% screen is 70%? As you can imagine, when we print in black and white, our pictures look really wierd.

Nick_V
06-05-2013, 09:12 AM
A few questions first since, while this can be calibration related, there are also many color settings which can produce the results you're seeing.


What color mode is the input data? RGB, CMYK, or grayscale?
Does the data print correctly when you print in color?
What black settings are you using?


Calibration will map your printer's output to so that it's linearized for a target toner density value. If your engine is unable to achieve the target density, you could have some issues achieving the output you want. Fiery won't be able to help much in this case although you can check your density curves when you look at your output profiles.

In the case of black, we have black settings which are designed to detect 100% black input data (on text and/or images) and pirnt them at the maximum density. These settings can sometimes result in gradients jumping to 100% black earlier than expected. Or there may just be a huge jump from 99% to 100%.

amanda.poole
06-05-2013, 09:40 AM
We want to print in Grayscale because it is less expensive. In color it looks better, but the screen values are still too high - a 85 reads as a 95 in color, in grayscale the 85 reads as a 100. We have tried using source and using output, but we get the same results.

Is there a place (like we do when we make a curve) where we can tell the machine the density values we are getting so it can make the adjustments? We would tell it that a 5 is reading 11, a 10 is reading 18, a 15 is reading 26 etc.

Nick_V
06-05-2013, 11:03 AM
You can always edit your output profile. Though for the Black channel to reflect any changes, you'll have to set your Black settings to be "Normal"