if you can not find retayne locally you can purchase it from Dharma Trading company on line- Rit also makes a 'Dye Fixative' I recently bought a bottle at the local Joannes when i ran out of Retayne half way through a large dye job- it worked too. Reds are generally the most difficult dye to set- and as DogHouseMom stated vinegar & salt are simply wasting money on the dyes of today- they worked way back in the 70's & before- but in the late 70's dyes changed- due to (epa regulations) among other reasons...the new dyes are created differently & require different techniques. Retayne sets dyes, Synthropol suspends dyes in the water- meaning it will not stop a dye from running-but when it does run it will keep it from getting on other fabrics in the water- it keeps the dye suspended in the water.