A reactive navy to black dye composition comprises component A and component B. Component A is one or more selected from the group consisting of dye compounds of formula (I) and alkali metal salts thereof, and component B is one or more selected from the group consisting of dye compounds of formula (II) and alkali metal salts thereof, based on component A and component B, component A has a mass percentage of 5% to 50%, and component B has a mass percentage of 50% to 95%. The present invention also provides a reactive navy to black dye product comprising the reactive navy to black dye composition. The reactive navy to black dye composition and dye product thereof with properties such as good fastness to washing, high degree of fixation and good build-up, which is suitable for printing and dyeing of nitrogen-containing and/or hydroxyl-containing fiber materials and blended fabrics thereof.

##STR00001##

A reactive navy to black dye composition comprises component A and component B. Component A is one or more selected from the group consisting of dye compounds of formula (I) and alkali metal salts thereof, and component B is one or more selected from the group consisting of dye compounds of formula (II) and alkali metal salts thereof, based on component A and component B, component A has a mass percentage of 5% to 50%, and component B has a mass percentage of 50% to 95%. The present invention also provides a reactive navy to black dye product comprising the reactive navy to black dye composition. The reactive navy to black dye composition and dye product thereof with properties such as good fastness to washing, high degree of fixation and good build-up, which is suitable for printing and dyeing of nitrogen-containing and/or hydroxyl-containing fiber materials and blended fabrics thereof.

##STR00001##

A single body, which is a base material that contains a dichromatic dye formed from an azo compound, that exhibits transmissivity of equal to or greater than 35% and a polarization degree adjusted to equal to or greater than 99% and is characterized in that a* and b* values, which are acquired for a polarization element or a polarization plate using JISZ8729, have an a* and b* absolute value that is: less than 1 at the time of a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.

A single body, which is a base material that contains a dichromatic dye formed from an azo compound, that exhibits transmissivity of equal to or greater than 35% and a polarization degree adjusted to equal to or greater than 99% and is characterized in that a* and b* values, which are acquired for a polarization element or a polarization plate using JISZ8729, have an a* and b* absolute value that is: less than 1 at the time of a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.

A reactive navy to black dye composition comprises component A and component B. Component A is one or more selected from the group consisting of dye compounds of formula (I) and alkali metal salts thereof, and component B is one or more selected from the group consisting of dye compounds of formula (II) and alkali metal salts thereof, based on component A and component B, component A has a mass percentage of 5% to 50%, and component B has a mass percentage of 50% to 95%. The present invention also provides a reactive navy to black dye product comprising the reactive navy to black dye composition. The reactive navy to black dye composition and dye product thereof with properties such as good fastness to washing, high degree of fixation and good build-up, which is suitable for printing and dyeing of nitrogen-containing and/or hydroxyl-containing fiber materials and blended fabrics thereof. ##STR00001##

A reactive navy to black dye composition comprises component A and component B. Component A is one or more selected from the group consisting of dye compounds of formula (I) and alkali metal salts thereof, and component B is one or more selected from the group consisting of dye compounds of formula (II) and alkali metal salts thereof, based on component A and component B, component A has a mass percentage of 5% to 50%, and component B has a mass percentage of 50% to 95%. The present invention also provides a reactive navy to black dye product comprising the reactive navy to black dye composition. The reactive navy to black dye composition and dye product thereof with properties such as good fastness to washing, high degree of fixation and good build-up, which is suitable for printing and dyeing of nitrogen-containing and/or hydroxyl-containing fiber materials and blended fabrics thereof. ##STR00001##