Curtains again white with baking soda
That's a tip for all smokers. Who does not know that: yellow curtains in the apartment, just how do you get those things white again?
So first wash normally. Do not worry if those things are still not really white, the real trick is yet to come.
So off with the curtains in the bathtub or in the shower, water on it and two to three bags of baking soda (depends on the degree of pollution) and 4 ink cartridges.
The acid in the ink, in conjunction with the baking powder, pulls the nicotine out of the curtains. Do not panic, they will not turn blue. The water dilutes the ink.