I don't know of a retail source in Sweden for dyes, but I do know of one in Denmark, Granat Farvekompagniet, which sells
Remazol fiber reactive dyes, which I like to use, and several European sources in other countries for the Procion MX dyes, which are the most popular kind of dye for tie-dyeing.
It's also worth checking how much it would cost to send dyes from the US via a relatively slow postage rate, because the best suppliers in the US, such as PRO Chemical & Dye, tend to charge significantly less for their dyes, though then you have the issues of customs duties. Shipping via the fastest method is prohibitively expensive. See my page of
Sources for Dyeing Supplies Around the World for retailers in both Europe and the US.
What kind of fabric "paint" have you used in the washing machine? I think that language may be a little confusing here. In English, "
fabric paint" is insoluble particles of pigment that are stuck to fiber with a glue-like binder; since it sticks only to the outside of the fiber, it wears off quickly. The molecules of "
fabric dye" attaches directly to the fiber, and penetrate throughout the fiber. There are some good
fiber reactive dyes for use in the washing machine, such as Dylon Machine dye, and there are also poor dyes that can be used in the washing machine, such as Rit
all-purpose dye. All-purpose dye is bad for tie-dyeing because it fades so quickly when you wash it. Dystar makes Levafix dyes which are another kind of good fiber reactive dye, if you can find them locally, possibly under the brand name of Furian.
Paula