How do you wash dark t shirts with White sleeves?

[Jackjack]

Ds has two which have now got greyish sleeves! I usually put them in with a mixed wash 40o, what am I doing wrong or is this inevitable? Xx

I suppose you could unpick them, and stitch back afterwards?

sounds impractical to me. I think you are doomed.

inevitable. that's designers who don't think about practicalities imo.

cold wash sometimes works

Try Colour catcher sheets. They do help a bit with preserving the whiteness of the sleeves!

I usually have a few stripy things that go in together. I always wash them with lighter things once the first wash has been done. I find the colour on them never runs.

Thanx guys, will keep away from them in future!