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Colour effect is obtained from mixing different coloured fibres before the blend. In the production of mélange colored textile materials, the incorrect prediction of fibre colors, which will provide the mélange colour desired, constitute a major problem for textile businesses. In this study, an attempt was made at estimating the mix of fibre colours to obtain the mélange colour desired before production. For this purpose, polyester and viscose fibres were used in yellow, red and blue colours. These fibres were obtained in different ratios, three colour mixes and 720 mélange coloured bands. The colour values of these bands measured by a spectrophotometer were expressed in CIELab 1976 units. The Stearns - Noechel model was the basis for colour forecasting. A new approach has been developed for calculating coefficient M in the model. This approach results in each mixture, and a different coefficient M was calculated for all the wavelengths in the range 400 - 700 nm. Colour calculations were made using the M coefficients. The average colour difference between the colour values measured and those calculated were found to be 0.95 CIELab units. This result suggests that in fibre blends, estimating the colour of the Stearns - Noechel model might be a sufficient result.

Melange color is a color effect obtained by mixing of fibers in different colors before the blend. One of the biggest problems encountered in the work of mélange colors in textile is that, not accurate estimation of fiber colors provides desired color. In this study estimating the mélange color pre-production, yellow, red and blue colors used in the viscose and polyester fibers. These fibers in different ratios and two colors mixed and 165 mélange-colored bands were obtained. Color values of these bands, measured in the spectrophotometer were expressed in CIELab 1976 (D65 illuminant and 10o standard observer) unit. Stearns - Noechel model has been the basis for color forecasting. To calculate the model M, in the coefficient, a new approach was developed. A different M coefficient was calculated for all wavelengths in each mix, 400-700 nm (10nm intervals) range. The color calculations are performed, using the M coefficients. The average color difference between the measured color values and calculated color values was found as 1.15 CIELab units. This result suggests that in the fiber blend estimating the colors of the Stearns - Noechel model might be a sufficient result.

Fibres in different colours are mixed prior to blending in order to obtain different dyeing effect (melange colour). One of the biggest problems encountered in these mixtures, is the difficulty of estimation of exact ratio of fibre blend to obtain desired mélange colours. In this study, to predict the fibre blend colour, 84 pieces of mélange colour band sample were obtained by blending of different proportion black and white Viscose and Polyester fibres. Measured colour values of these blends were expressed in CIELab 1976 units (D65 illuminant and 10o standard observer). Stearns-Noechel model in a tristimulus colour matching algorithm was based on for colour prediction. M values in this model (the empirical constant in the Stearns-Noechel model), were obtained by developing a new method through the linear correlations between various blending ratios and Stearns-Noechel function. Average colour difference between measured colour values and calculated colour values was found to be 0.98 CIELab units. This result shows that Stearns-Noechel model can be used in colour matching in fibre blends.