After that, the associated Computer aided colour match prediction software
takes over the rest part of the work of calculations and comparison of colour data to
show the measured values and calculated colour values using stored colour database
of specific dyes for specific type of textile substrate.
Table 1 shows Computer aided
colour match prediction system (CACMPS) generated dyeing recipe and its dye cost
and estimated approxmiation of Colour difference values with least metameric ratio
for cotton fabric sample to be dyed to match against given standard samples using
direct dye data base stored.
The above shown formulae of colour match prediction generated against standard
shade C5, has generated two possible recipes, and is difficult to decide which one we
should accept and proceed for bulk dyeing. From the Point of least metamerism,
formulation-1 and from the point of least cost Formula 2 are respectively found
better after 4 trial run in Computer aided colour match prediction system (CACMPS)
within DE limit to 1.00. Thus, computer predicted formulation 2 is least cost and
formulation 1 is least metameric in nature, as shown in output result generated here.
3. Some practical consideration during measurement on CCMP system
The practical aspects of data base generating match generation using a data base,
setting up proper DE or multiple colour tolerance & above all accurate spectropho-
tometer measurement depends on following factors.
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