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Sonoco Institute

Process Color Management Seminar

Overview

For many years, Clemson has led the flexographic printing industry, offering educational opportunities in process color printing and pressroom process control. This two-and-a-half-day seminar builds on proven methods and incorporates current trends and processes for CMYK color reproduction.

Attendees who attend this Sonoco Institute seminar learn the workflow of process color printing for flexography, from creative design through press quality process control.

  • Hands-on Sessions
    • Optimizing ink, ink film thickness and tone reproduction
    • Press calibration and characterization through fingerprinting
    • Color measurement, analysis and profile generation
    • Utilizing ICC profiles in electronic workflow
    • Managing expectations through proofing
    • Process control in the pressroom
  • Presentation Topics
    • Color systems 101, tone reproduction and gray balance
    • Flexographic characteristics in process color printing
    • Color fingerprint test
    • Workflow of CMYK color management
    • Proofing in's and out's
    • Key process indicators and implementing process control
  • Agenda

    Location: Harris A. Smith Auditorium

    Day 1

    8:30 a.m. - Program overview and introductions

    8:45 a.m. - Process color workflow: Design-to-print and key indicators: Map press, prepress, design and customer; review key components in each section; review how components integrate with process color.

    9:15 a.m. - Color metrics, measurement and instrumentation: Spectral reflectance curve and physics of color; illuminants and observer; CIELAB and CIE LCh; density, dot area and dot gain; △E - DL, DC and Dh formulas; instruments, bulbs, geometry and agreement; handheld, tethered and in-line.

    10:15 a.m. - Break

    10:30 a.m. - Color systems, dots and gray balance: RGB and CMYK; additive and subtractive; CMYK ink trapping and overprints; tone reproduction with CMYK theory; tone reproduction in practice (intro to Dot%, NPDC and LPI); visual gray balance theory; gray balance in practice - grayscale, intro to G7 gray.

    11:30 a.m. - Color specifications and standards: ISO 12647-6; FIRST process color specifications; preserving hue and maximizing chroma.

    12 p.m. - Lunch

    1 p.m. - Flexo system optimization I: Ink and Anilox: Substrates and ink film thickness; ink concentration and resulting color; aniline volume, CPI, color strength, coverage and wear; banded aniline test and controlled experiment.

    1:30 p.m. - Flexo system optimization II: Plates: Plate dot structures including translation from file to plate; implications of the highlight dot to process color workflow; optimization with mounting - slur, mottle and coverage; solid patterning.

    2 p.m. - Breakout sessions:

    • Session A: Press calibration: Press testing 101; press colors to ISO 12647-6; sample measurement; near-neutral calibration; curve generated; establishing a process control benchmark.
    • Session B: Banded anilox evaluation: Anilox roller selection; capability analysis; LPI evaluation and selection; highlight optimization; hands-on densitometers and dot area plot.
    • Session C: Ink analysis and formulation: Drawdowns with different anilox on different substrates; basic color measurement; analysis of color strength and chroma, return on investment and ink film thickness.

    5:30 p.m. - Group dinner


    Day 2

    8:30 a.m. - Curves and prepress workflow: Accounting for press and flexo system variability with prepress curves; curve selection and continuous improvement; near-neutral calibration methods; halftone angles; total ink limit.

    9:45 a.m. - Break

    10 a.m. - Digital proofing for flexo: Flexo proofing considerations; technology available; screened and contone; ICC deficiencies; certified proofing.

    11 a.m. - Breakout sessions:

    • Session A: Plate process control; anilox process control; print IT8 and color test; dial-in to established benchmark; documentation.
    • Session B: Color reference file; color measurement; color data analysis compared to standard data sets; profile generation; profile analysis.
    • Session C: Photoshop color evaluation; separations to GRACoL; separations to custom; output proofs; proof certification.

    12 p.m. - Lunch

    1 p.m. - Breakout sessions (Continued)

    3 p.m. - Break

    3:30 p.m. - Print quality assurance: Global and multi-plant perspective; ink, aniline and plate; pressroom process control; tone strips: 100, 70, 30, 10, min; linear vs. curved; plate control, print control and curve control.

    4:30 p.m. - Process overview and final job preparation: Review entire process color characterization workflow and prepare images for final job (RIP and inspect).

    5 p.m. - End of day


    Day 3

    8:30 a.m. - Managing flexo expectations: Customer perspective: Process color in packaging; managing creative expectations through proofing; process control for packaging repeatability.

    9:15 a.m. - Expanded gamut process color printing: CMYK integration within ECG; extra process inks defined; curve calibration with ECG; intro to color management in ECG.

    9:45 a.m. - Break

    11 a.m. - Breakout sessions:

    • Session A: Inspect and measure samples of process print defects to determine the root cause of the problem.
    • Session B: Running to the numbers; final job printing; samples; proof-to-press evaluation.

    11:30 a.m. - Evaluations and adjourn

  • Cancellation Policy

    21 days prior to event date for 100% refund; 14 days prior to event date for 50% refund; no refund will be given less than 14 days. Email us for more information.

The Sonoco Institute of Packaging Design and Graphics
The Sonoco Institute of Packaging Design and Graphics | 311 Harris A. Smith Building, Fernow Street, Clemson University, Clemson, SC 29634