Features:Automatic disappearing pen, the speed of color fade is related to the written material and the external environment such as temperature and humidity. With water, the scratch can be quickly discolored. For the use of shoes, clothing, art design, product drawing. For garments, sweaters, shoes, leather goods, and other processed products, temporary records are very practical. Various cut marks, embroidery, proofing (no trace after disappearing). Quality control is ideal for proofing the number of points and modifications of any product. There will be differences depending on the weather and the fabric. After painting, it will fade slowly, not immediately after the specified time!The marking line on the fabric with strong adsorption force (such as cotton cloth, polyester cotton, sponge) disappears for a long time, and the marking line on the weakly adsorbed fabric such as nylon and chemical fiber disappears very quickly. Depending on the method of use (such as: points, signs, line segments, line labels, etc.), the disappearance time is very different. This product is made according to the principle of eliminating the water(moisture) elimination mark in the air. If you need to remove the mark quickly,apply it with water will do. Specification:Material:PlasticPackage List:12 x Sewing Pen