This is a method for producing graphene. The rGO technique and its variants are based on the Brodie method, which was later developed into the Hummers method and subsequent variants. rGO employs graphite as a feedstock in which it is mixed with sulfuric acid to serve as an intercalating agent and potassium permanganate as an oxidant. This mixture is heated at high temperatures to produce graphene oxide (GO). At this point, the GO is reduced to graphene either chemically or thermally and with further steps of sonication, rinsing and dispersion.