If anyone missed out on the SWToys Claire set and is looking for a good black T-Shirt for a Classic Claire then I highly recommend this listing. It cost roughly $16 and comes with a set of black underwear shorts too.
Mine just arrived, so I tested it out by hand-washing it. Literally no black ink/residue came out at all. It's stainproof on bodies, and requires no washing prior to application due to the quality materials used. An absolute win for customizing