Salt rinse

Claim 1

A PROCESS FOR THE COLORING OF TEXTILE MATERIAL OF A CELLULOSE ORGANIC ACID ESTER HAVING LESS THAN ABOUT 0.29 FREE HYDROXYL GROUPS PER ANHYDROGLUCOSE UNIT, WHICH COMPRISES APPLYING TO SAID TEXTILE MATERIAL A DYEBATH CONTAINING A DYESTUFF DISSOLVED IN A MIXTURE COMPRISING AN ORGANIC SOLVENT, SAID MIXTURE HAVING SUCH SOLVENT POWER THAT WHEN A TEXTILE MATERIAL CONSISTING OF FIBERS OF THE USUAL SECONDARY CELLULOSE ACETATE OF LOWER ACETYL CONTENT, HAVING AN ACETYL VALUE OF 54-55%, CALCULATED AS COMBINED ACETIC ACID, IS IMMERSED IN SAID DYEBATH, SAID SECONDARY CELLULOSE ACETATE FIBERS ARE COALESCED AND THE TEXTILE MATERIAL THEREOF LOSES ITS FIBROUS CHARACTER, THE SOLVENT POWER OF SAID MIXTURE BEING INSSUFFICIENT TO CAUSE ANY COALESCENCE OF OR OTHER DAMAGE TO THE FIBERS OF THE HIGHLY ESTERIFIED CELLULOSE, WITHOUT DRYING APPLYING TO SAID TEXTILE MATERIAL A HOT AQUEOUS SOLUTION OF A SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF MINERAL ACIDS AND LOWER ALKONIC ACIDS, AND SUBSEQUENTLY SCOURING SAID TEXTILE MATERIAL.