Name: Mary
Message: we purchased some tiedyed tshirts that faded quite a bit after the first washing. I thought I heard soaking in vinegar could help set the color. Is this true?

No, it won't help a bit.

If a tie-dyed shirt fades when you wash it, it was dyed improperly and should be returned to the dyer. Either they used the wrong kind of dye (all-purpose dye is not suitable for room temperature tie-dye!), or they omitted an important step in what is really a very easy process.

See the answer to this question in the FAQ section of my website, under "How can I set the dye in the clothes I just bought?".