Process for the indigo dyeing of yarns in skeins
AssigneeLeglertex s.r.l.
InventorAgostino Parati
Life of this patent
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Abstract
Process for the indigo dyeing of yarns in skeins having the peculiarity that it consists in placing a skein of yarn on at least two spaced rollers, in at least partially impregnating the skein in an indigo dyeing bath drawn continuously from a main indigo dyeing bath of a plant for the continuous dyeing of yarns in ropes or bands, in exposing the impregnated part to air for its oxidation, in alternately repeating impregnation and oxidation for a preset number of times which is a function of the color intensity to be obtained, in washing the skein to remove the residue of dye which has not been fixed on the fiber and in drying the skein.
Claims5
Process for the indigo dyeing of yarns in hanks or skeins, comprising the steps of:
- placing a skein of yarn on at least two spaced rollers;
- at least partially impregnating said skein in an indigo dyeing bath drawn continuously from a main indigo dyeing bath of a plant for the continuous dyeing of yarn in ropes or bands;
- exposing said skein in air for oxidation;
- alternately repeating the impregnation and oxidation steps for a preset number of times which is a function of the color intensity to be obtained;
- washing the skein to remove the residue of dye which has not been fixed to the yarn of said skein;
- and drying said skein.
Dependencies are inferred from the claim text.