It is used in the coating of foundry molds and cores, also to incorporate graphite iron, among other uses. They come in black powder, high purity. Your granometría M200 or M325 may be. It is also sold graphite pellet prevents volatilization. There are more technical information about this product to request call 4721-9391 / 4756-3084 or via e-mail to ventas@mazzola.biz.