IDENTIFIKASI MINERAL MAGNETIK PADA TINTA KERING (TONER)

Abstract

Magnetite (Fe₃O₄) is one of the most important magnetic mineral for scientific and industrial purpose. The magnetic characterization from each mineral is depend on the  grain size. In this research, we have done a series of analysis to identify the presence of magnetite as Pigment or filler in industrial materials, this industrial materials were the toner from cartridge of Canon photocopy Type NP-1010 and Laser Printer’s of Hewlett Packard Type C3906F. We have done some characterization, the magnetic characterization and non-magnetic characterization.  In magnetic method, we measure anisotropy magnetic susceptibility (AMS), anisotropy of anhysteric susceptibility (AAS) and isothermal remanent magnetization (IRM). In non-magnetic method, we use scanning electron microscopy (SEM). The result of this analyze showed that the two materials contain of magnetite mineral with the grain size smaller than 0,1µm for toner from printer laser and 0,1µm - 0,2µm for toner from Canon photocopy. The results from SEM method showed the presence of iron oxide that we predicted as magnetite. The role of magnetite as pigment is fairly obvious provides the coloring (black, in a monochrome printer) that fills in the text and images, this pigment is blended into other material that is domination of carbon.

Keywords: magnetization, magnetic method, SEM, toner