DIFFERENT TEXTILE SECTOR NEEDS COMPUTER IN THIS PPT IT IS CLEAR IN WHICH DEPARTMENT WE NEED COMPUTER COLOR MATCHING MACHINES OR OTHER MACHINES

1. FOR DYERS IN
TEXTILE INDUSTRY
ROLE OF COMPUTER

2. HISTORY OF CCMS
• First in 1963, ICI, Dyestuff
• division established the Computer System for colour match
prediction in their lab, but it was for their customer only.
• Later in 1973, ICS (international colour system), manufactured
computer matching system commercially.
The basic three things are important in CCMS: -
• Colour measurement Instrument (Spectrophotometers).
• Reflectance (R%) from a mixture of Dyes or Pigments applied
in a specific way.
• Optical model of colour vision to closeness of the colour
matching

3. WHAT IS COLOR AND COLOR
MATCHING?
• Color has a degree of lightness or value
• Hue is the actual color
• Color has some saturation- The amount of color
present
• Color matching for fabric is
the technique of identifying
the dye
• combinations present in the
fabric and replicating

4. HOW COMPUTER COLOR MATCHING
IS DONE
A colour match predictability system has the following:
• A predictability guide
• A spectrophotometer,
• And a computer with input and output devices.
A light is directed at the colour sample and then passed into the
spectrophotometer where its colour spectrum is analysed, converted
into data, and fed to the computer. The quality of the colour match
for the various formulations is analysed to determine the
formulation having the best possible colour match. The modified
sample having the best colour match may be viewed by the user to
predict the colour of the final product.

5. COMPUTER COLOUR MATCHING
SYSTEM
• A computer color matching system is
not a “black box” that magically
produces the exact
• formula for a sample on demand. The
accurate preparation of dye primaries
and the
• careful evaluation of the stored data are
essential if a color matching system is
to be able to predict formulas with any
consistency. As this is accomplished,
significant reductions
• in the number of dyeings required to
match new shades are made possible.

6. TYPES OF COLOR MATCHING DEVICES
COLORIMETER
• Comparatively low price
• Compact Size
• Simple operation
• Better mobility

7. • Expensive
• high precision
• more versatile
• accurate colour measurement
• suitable for complex colour analysis
• can measure colour strength
and metamerism
SPECTROPHOTOMETER

8. FUNCTIONS OF COMPUTER COLOUR
MATCHING SYSTEM
The following can be done by using CCMS -
• Colour match prediction.
• Colour difference calculation.
• Pass/Fail option.
• Colour –fastness rating.
• Cost Comparison.
• Strength evaluation of dyes.
• Whiteness indices.
• Reflectance curve and K/S curve.
• Production of Shade library Etc.

11. ADVANTAGES OF CCMS
Computer Color Matching System
(CCMS) the following advantages in
Textile Industry.
• Customers get the exact shade wanted
with his knowledge of degree of
metamerism.
• 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.
• Limited range of stock color needed.

12. LIMITATION OF CCM SYSTEM
• Calibration Samples: The dyeing conditions in the laboratory &
productions differ in various respects viz, M: L ratio, auxiliaries
dyeing machines, exhaustion of dye etc.
• Change of Substrate: It is very difficult to maintain the
characteristic properties of the substrate as regards the quality of
the fibers, yarn structure, fabric construction, colour, heat setting,
pretreatments, etc. which in turn changes the dye uptake
properties of the fiber. It is particularly impossible to prepare the
basic calibration data under all such variation.

13. • Change in Dyestuff: Every incoming batch of the dye stuff
requires testing for tonal & strength changes which needs
recalculation of the recipe.
• Recipe suggested by the computer are based on minimum colour
difference within given tolerance & least metamerism in
CIELAB scales. But always CIELAB tolerances do not confirms
exactly with human perceived colour difference.
• Light sources used to test the match, are CIE standardized
simulated standard illuminant, which are not same in all respect
with natural sunlight. Instrumental accuracy may be checked
periodically.
• The kubelka-munk equation & optical theory of computer colour
matching do not apply strictly on extra glossy or fluorescent
samples.

14. OTHER APPLICATION OF CCMP
SYSTEM IN DYE HOUSE
• For quality control of dyed textiles.
• For Evaluation of Quality of dyes supplied.
• Role of dyeing additives by measuring colour yield.
• Efficiency of optical brighteners by UV analysis.
• Soil removal efficiency of surfactants by measuring
Reflectance value.
• Measurement of whiteness/yellowness/brightness index etc.

15. CONCLUSION
At the end, it may be said that after necessary training and
guidance, this Instrument of CCM system can be used successfully
for its versatile use including Computer Aided Colour measuring
and Matching purpose which needs to be implemented in all dye
houses of either all textile dyeing or jute dyeing to derive the above
said benefits of precession matching and customer satisfaction.

16. REFERENCES
• http://www.patentstorm.us/patents/4887906.html
• http://www.webopedia.com/TERM/C/color_matching.html
• http://www.cyberchromeusa.com/Portals/60113/docs/oncolor_match
_brochure.pdf
• http://www.mli.com.mx/pdf/spectramatch.pdf
• https://textilelearner.blogspot.com/2011/05/different-types-of-
computer-color_9427.html
• https://lupinepublishers.com/fashion-technology-textile-
engineering/fulltext/fundamentals-and-applications-of-computer-
aided-colour-match-prediction-ccmp-system.ID.000148.php
• https://drnsg.wordpress.com/2012/07/20/internet-based-color-
matching-system-for-textiles/