Nawaro (which means of sustainable resources) non-toxic 10 magic markers colours :  The basic color changes for that of the hood grace the white felt-tip! Is used so as an invisible ink! In case of oversight and a little bit dry points, 2 drops of lemon or vinegar will save you ! Colors are soluble in the water, washable and not toxic. Tip 6 mm high resistance. Without solvent. Oko Test label. Made in Germany. Children aged 3 and over.
 
Composition of the ink : petroleum jelly, cosmetic pigments, gall, sorbate of calcium.