Nekkan Chalk A

● Okitsumo Nekkan Chalk A is the chalk that can write letters or marks directly onto the surface of heated materials.
● It can be used between the temperatures of 180°C to 1200°C.
● There is no danger of inflammability or smoking because this is formed by pure inorganic matters. The written traces dry up within a minute and the letters or the marks clearly remain even after they are rubbed.