Special textile medium that can be mixed with other types of paint in a 1:1 ratio so that the paint can be used as a textile paint on light-colored fabrics. After heat fixing with an iron, the item can be washed at 40°C. How to turn your water-based paint into fabric paint:
If the textile paint must be (almost) opaque, then the paint must also be opaque. For example, mix the textile medium and opaque Plus Color hobby paint in a ratio of 1:1 per color. Make small portions because the paint has good coverage. After decorating your textile piece, let it dry before heating it with an iron. Don't forget to place a sheet of baking paper over the painted area.
If you want a more transparent and watercolor look, the textile medium can be mixed with water in a 1:1 ratio and can also be mixed with a thin, liquid watercolor paint. Depending on the desired intensity of the paint, drops of liquid watercolor paint can be added to the medium. Add more paint for a bolder translucent look. If desired, you can moisten the piece of textile so that the colors flow freely over the surface and blend into each other to achieve the desired 'watercolor look'.
Tip: Don't forget to place a piece of plastic or similar in fabric pieces that have a front and back so that the paint doesn't bleed onto the back of the piece.