For children over 3 years. Simple use without shaking and pumping. After a drying time of at least 4 hours, place the painted object in the cold oven. Heat oven to 160° C. When the temperature is reached, bake for at least 30 minutes. Turn oven off. Let cool inside the oven. Object is dishwasher suitable after the burning-in process. Stroke width 1mm. Please note the actual design of the pen casing may differ slightly from the picture but the product is the same.