Does a design painted with an edding 4200 porcelain brush pen have to be baked in the oven for it to set?
Yes. Before baking, let the design dry for approx. 15 minutes, then bake the object in a preheated oven at 160°C for 25 minutes. Leave in the oven to cool afterwards. Now the ink will be fixed and dishwasher-safe up to 50°C.