i get a lot of questions about the laundering of contact-printed cloth...should it be dry-cleaned, is the dye washfast, what's the best way of cleaning it etc
the answer, in short, is to treat your plant-dyed cloth as you would treat your own hair.
not too hot, not too cold. no harsh detergents, no greasy soap. because if you use either of those you'll need to rebalance the pH with a vinegar and water rinse afterward (which is kind of what conditioner does for your hair. they only make it gluggy so it won't run off your hand in the shower)
wash by hand or using the wool cycle on a front-loader.
i recommended Aesop's APC Fine Fabric Care on my labels, cos it smelled divine and was wonderfully gentle on cloth. so gentle, in fact, that i could have used it in the shower.
sadly though i seemed to be the only customer buying it and so they discontinued the lovely stuff.
their animal wash does the trick, but doesn't smell as nice.
the other important thing is to dry your cloth in the shade.
unless you are washing sheets, in which case peg em out in the sun and the wind.
they'll be crispy white and smell like heaven.
just remember to avoid the dry-cleaner like the plague. the process is neither dry nor clean and will have your favourite silk negligible sloshing around in a vat of petrochemical nasties along with the filthy trousers worn by a travelling salesman for four weeks and somebody else's vomit stained car seat covers.
and have a nice day.