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Print Inspector

Digital Variation


How does it work?

A detailed analysis should be done in order to understand what the "Normal Variation" is in your process. ChromaChecker Digital Variation Inspector makes this possible. Specially designed test forms and software enable this capability. Comparing reproduction of control patches in different locations on test page and different pages, allow Chromachecker to describe multiple variation conditions with color metrics.  


Test Forms

There are several versions of Digital Variation Test Form dedicated for different instruments and page sizes. 

Tabloid size forms:

X-Rite™ iSis  X-Rite™ DTP-70 X-Rite™ i1iO
DIG_VAR-816_ tabloid_iSis_0,92 DIG_VAR-816_ tabloid_DTP-70_0,92 DIG_VAR-816_ tabloid_i1iO_0,92

X-Rite™ ColorPort Target
X-Rite™ ColorPort Target X-Rite™ ColorPort Target

  

A3 size forms:

X-Rite™ iSis  X-Rite™ DTP-70 X-Rite™ i1iO
DIG_VAR-816_ A3_iSis_0,92 on special request only                   on special request only                 
X-Rite™ ColorPort Target X-Rite™ ColorPort Target
X-Rite™ ColorPort Target

 
Testing Scenarios

  1. Creating baseline for printing device
  2. Long-term variation testing procedure
  3. Short-term variation testing procedure
  4. G7/TVI calibration procedures (export data to Alwan Print Verifier or Alwan Print Standardizer)

Analysis

1.  Within page analysis (Variation within a page) – This analysis is critical to your overall goal. If the variation on the page is beyond your tolerance, then this has to be fixed, because no calibration or Tone Reproduction Curve (TRC) can overcome within page inconsistencies.

2. Within job variation analysis (Variation between pages)- This analysis should be conducted by running multiple consecutive pages through your process. If this variation is beyond your tolerance, then no profile or TRC can fix it, it is a mechanical fix.

3. Within Calibration variation analysis (Variation between Calibrations- you chose time sequences)- This analysis will help you understand how often calibration should be conducted in order to keep your device consistent and repeatable. Remember, atmospheric conditions can have a huge influence on how often calibration should take place, so tracking the temperature and humidity is important to be able to trace factors responsible for variation.

4. Between calibration variation analysis (Variation after Calibration – how well does the calibration do at getting device back to starting condition) - This analysis will help you understand if your Calibration procedures are really making your device repeatable. Sometimes procedures are not done correctly so what is thought to be correct, does not produce a consistent result negating the purpose of Calibration. Also, some calibration tools do not do a good job of bringing the device back to its baseline condition, which results in an uncontrolled variation in output.


What is analyzed?

  1. Primaries solid patches (CMYK) in both vertical and horizontal directions (optical density: spectral and colorimetric, ∆E to baseline)
  2. Secondary solid patches in vertical direction
  3. 5 shades of grey (from NPDC curve) - in vertical direction
  4. CMYK and RGB reproduction curves

 
 

Beta Testers

To join beta tests program you need an access to a digital press and one of the following instruments:

To join the beta testing program need access to a digital press, and one of the following instruments:
X-Rite™ iSis,  X-Rite™ DTP-70, X-Rite™ i1iO.

File naming convention:

AAAA_MMDDYY_BBBB_CC_DD_EEEE.txt
where:

AAAA - betatester ID
MMDDYY - current date
BBBB – press ID
CC  – type of scenario
DD  – series ID
EEEE  – serial number

To join start from registering your ID ( four letters/numbers of your choice) and your presses IDs