At Rajkalp Mudranalaya Pvt. Ltd., we follow certain standard procedures for quality control. These procedures are common to all print jobs and are described here:

Color Management
Using I1-pro and ProfileMaker Plus (Gretagmacbeth), all the monitors and proofers are calibrated. We have calibrated our press and have our own ICC profiles. We request our parties to provide us RGB files and conversion from RGB to CMYK or any other color space is done using or own ICC profile.

Plates
With the help of standard density bar exposed on each plate, consistency of each exposed plate is checked using Gretagmacbeth IC Plate II advanced plate reader. The following things are checked with extra care: a) the plate gives consistent readings across its length, b) 1% dot is in the range 0.7% to 0.9%, c) 50% dot is in the range 47.5% to 49.5% and d) 99% dot is open, i.e. 97% to 99%. If any plate fails this criteria, it is rejected, the problem is found and rectified and a new plate is prepared.

CIP3 Ink Presetting
Ink data for QSI on Mitsubishi press is generated by the Prinergy Evo workflow at the time of exposing the plates. The data is transferred through network to a PPC server which in turn, sends the relevant data to the press control panel IPC which automatically sets ink zones on the press.

On-press Spectrophotometry
With the help of MCCS II (Mitsubishi Color Control System), color bar printed on the top edge of the printed sheet is scanned and analyzed to determine deviations in ink density from a target density. It compares the target color value and actual value of the pulled sheet to calculate recommended adjustments for the appropriate ink zone. The recommended adjustments are sent to the IPC and ink zones are automatically adjusted. The entire process takes only a few seconds and allows us pull out and measure sheets frequently. The parameters like density, ink trapping, dot gain, print contrast and slur are monitored and also recorded for using during the re-runs.

TVI/Dotgain Management
To be able to print a job consistently and predictably, one must know and manage the TVI of the press with a given set of parameters: substrate, inkset, blankets, etc. ‘One curve fits all’ theory does not work where precision is of utmost importance. With MCCS II, TVI is checked on number of sheets and the values recorded. Before using any new substrate, we religiously print dotgain targets and create Tone Reproduction Curves. We have a practice of measuring and fine-tuning TRCs as frequently as once every month.