Computer is Ed Color Matching System

8/3/2019 Computer is Ed Color Matching System

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SUBMITTED BY-Dayal K. Munda(5)

Labij K. Boro(9)

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Method of specifying colors for a

print job in which a book of color

swatches is used for matching colors withstandard inks used in commercial

printing.

The most popular CMS is Pantone

Matching System

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The process of assuring that a color on

one medium remains the same

when converted to another medium. Thisis extremely difficult because different

media use different color models.

Color monitors, for example, use the RGB

model, whereas process printing usesthe CMYK( cyan, magenta, yellow, and

black) model.

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ICI, Dyestuff divisionestablished the ComputerSystem for color matchprediction in their lab, but it

was for their customer only.

1963

ICS (International Color

System), manufacturedcomputer matching systemcommercially

1973


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Color measurement Instrument

(Spectrophotometers).

Reflectance (R%) from a mixture of Dyesor Pigments applied in a specific way.

Optical model of color vision to

closeness of the color matching (CIEL*A*B).

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Color match prediction.Color difference calculation.Determine metamerism.

Pass/Fail option.Color fastness rating.Cost Comparison.Strength evaluation of dyes.Whiteness indices.

Reflectance curve and K/S curve.Production of Shade library. Etc.

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A spectrophotometer is an instrument

used to measure properties of light over

a specific portion of the electromagneticspectrum, typically used in spectroscopic

analysis to identify materials.

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Designed to transmit lights of narrowwavelength It does not absorb lights of all

wavelength (thats why things are ofdifferent color)

So since different compound absorbslight at different wavelength ,it can beused to distinguish compounds byanalyzing the pattern of wavelengthabsorbed by given sample.

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Reflected color can be measured using

a spectrophotometerwhich takes

measurements in the visible region (anda little beyond) of a given color sample.

If the custom of taking readings at

10 nanometer increments is followed,

the visible light range of 400-700 nm willyield 31 readings.

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These readings are typically used to draw the sample's spectral

reflectance curve (how much it reflects, as a function of

wavelength)the most accurate data that can be provided

regarding its characteristics.


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Spectrophotometers use an opticalmechanism to break down light enteringthe instrument into it's component parts

and measuring them in an objectivemanner.To do this, light is first collected from the

external target that the user is attemptingto measure. This light is then passedthrough a set of optics that focus andproject it onto a diffraction grating.

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This grating works like a prism and deflectslight of different wavelengths at different

angles. As such, the resulting pattern can beprojected onto a set of sensor that canmeasure the light at specific intervals. Aseach sensor can measure the quantity oflight in a specific area of the spectrum, this

allows the instrument to relay the exactcomponents of the light being measured tothe computer.

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How it works and its compounds


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This process is repeated for a set of differently

colored patches and the data from each

measurement is stored.

The profiling software can then compare thecolors that the patches were supposed to be with

the colors that were actually measured.

This data is then used by the computer to

generate a color profile that can counteract themistakes produced by the display device.

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The Pantone Color Matching System is

largely a standardized color reproduction

system .By standardizing the colors,different manufacturers in different

locations can all refer to the Pantone

system to make sure colors match without

direct contact with one another.

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One such use is standardizing colors in

the CMYK process. The CMYK process is

a method of printing color by using fourinkscyan, magenta, yellow, and black. A

majority of the world's printed material is

produced using the CMYK process,

The Pantone system also allows for many'special' colors to be produced such as

metallic's and fluorescents

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Pantone offers chip books thathelp designers see how colorslook on coated, uncoated, andmatte stock.

PANTONE Colors aredistinguished by numbers anda suffix. While the numberindicates the PANTONE Coloritself, and is standard across alltypes of stock, the suffix

indicates the media or stock,which affects how the ink isformulated to achieve thespecific color.

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Computer Color Matching System (CCMS) hasgreat advantages in Textile Industry.

For Example:

Customers get the exact shade. Customers often have a choice of 10-20

formulation that will match color. By taking

costing, availability of dyes, and auxiliaries into

account, one can choose a best swatch. 3 to 300 times faster than manual color matching

system.

Limited range of stock color needed.

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Gives output of the most reliable recipefrom many possible dyestuffs combinations

Imitate matching color by the Plus Function,to achieve the perfect effect is possible

It is easy to operate through the colorsequence graph

Net Profiler assures that the data isaccurate

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As color desktop publishing matures,

color matching is gaining more and more

attention. The most recent Windowsand Macintosh operating systems

include a color management system

(CMS) to assist in color matching.

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Color matching system in Macintosh O.P


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http://www.adsaleata.com/Publicity/ePub/lang-eng/article-1071/asid-77/Article.aspx

http://dyeingworld1.blogspot.com/2010/01

/computer-color-matching-systems.htmlhttp://www.konicaminolta.eu/measuring-instruments/color-light-knowledge/nanomania.html

http://www.indiantextilejournal.com/article

s/FAdetails.asp?id=1885http://www.hunterlab.com/pdf/Fabric-

SPXE.pdf

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Thank you ,Have a colorful

day ahead !!!

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Documents

Computer is Ed Color Matching System