controlling color on corrugated - tappi · 2010. 11. 5. · anilox rolls • volume is measured in...

Controlling Color on CorrugatedColor Consistency

Presented by: Name: Carl CecilTitle: Graphics/Educational SpecialistCompany: Color Resolutions International

Topic Discussion•Is color that critical?•What are the variables affecting color reproduction on corrugated?

•How do you check color press-side?•What percentage of predictability do you have from the ink lab to the press?

•Do you have a process for color management?

Is color that critical?we live in a world of color...

our eyes are stimulated by the reflected wavelengths of red, green and blue.

The major Consumer Product Companieshave determined that over 80% of the buying decisions in the retail environmentare made within the first 3-4 seconds ofvisual contact with the packaging.

Variables affecting color

•Paper.•Anilox rolls.•Ink (viscosity).•The cones in our eyes.

Paper

Paper

Anilox Rolls

• Volume is measured in Billion Cubic Microns (BCM) per square inch.

• 1 BCM = 1 microliter (1 millionth of a liter)• Cubic Centimeters per Square Meter (cc/m2) is the

standard used in Europe and parts of Asia.

Ink Film Thickness

1.8 BCM 5.6 BCM

Ink (viscosity)

Measuring viscosity

Subtitle of Presentation

Do we all see the same color?

What is light

WebsterA. Something that makes vision possibleB. The sensation aroused by stimulation of

visual receptorsC. An electromagnetic radiation

?

CIELAB perceptual space

Lab Lch

densitometersDensitometers are instruments used to measure the amount of light absorbed by a material. There are two types of densitometers.

• transmission densitometers -measure the amount of light that is transmitted through a transparent material such as film.

• reflection densitometers - measure the amount of light reflected by a surface.

colorimetersmeasure the amount of RGB light reflected from the sample.

spectrophotometersmeasure the amount of light at each specific wavelength reflected from the sample.

Correlation of the mechanical Proofer to the Press anilox roll

Press CorrelationPress Correlation

Printed Sample off the machinePrinted Sample off the machineWet Sample of ink right from the fountain from the Wet Sample of ink right from the fountain from the

machine machine documenting pH and viscosity and within printing documenting pH and viscosity and within printing

specifications for that sample.specifications for that sample.Actual substrate being printed Actual substrate being printed Anilox roll cell volume unit and metering type Anilox roll cell volume unit and metering type Spectrophotometer Spectrophotometer Calibrate the hand profferCalibrate the hand profferMechanical ProfferMechanical Proffer

Hand Proofer Correlation to the Anilox Roll on press

• Load colors onto X-rite software and create a customer file called press correlations.

• Store with the following tolerances• Type = DE CMC/DE 94 I= 2.0 c = .8 cf= .8• Illuminate observer = D65/10-D50/2• Using the mechanical proffer create a proof of the ink.• Measure the second revolution and evaluate with the X-Rite.• Evaluate apparent density specifications of + or - 5%• Evaluate Lightness specifications of + or - .5 • Evaluate Delta E specifications of DE CMC/DE 94 < .8

Thank youPRESENTED BY

Carl CecilGraphics/Educational SpecialistColor Resolutions Internationalccecil@colorresolutions.com

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