One-bath dyeing of polyester/cotton blends with reactive disperse dyes is investigated using supercritical carbon dioxide (SC-CO2) as a solvent in the range of 353 to 393 K and 10 to 20 MPa. One-bath dyeing of polyester/cotton blends is successful. The dyeing behavior is compared with the thermosol dyeing method using the same dye. Samples are subjected to a color fastness test and colorimetric measurements. Good color intensity and wash fastness are obtained by the SC-CO2 dyeing method at 393 K and 20 MPa. The color fastness properties of fabrics dyed in SC-CO2 are superior to those of fabrics dyed by the thermosol dyeing method.
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