To give a deep, 'aged' look to the mask, pigments that have been aged for three or four years are used, and several coats are applied over a period of one week, while using additional materials like soot for shading.
面に奥深い、年を重ねた趣を出すために、3~4年寝かせた絵の具を使います。さらに、すすなどを使って陰影をつけながら、1週間かけて数回塗り重ねていきます。