A paper tool includes a base having a front end and a rear end and a drive arm pivotally coupled to the base about a first pivot axis. More specifically, the invention relates to a revision knee implant. 5 or less and recovering the asymmetric \u03b2-diketone compound of Chemical Formula 1 separated from the \u03b2-diketone compound solution. The epoxy resin layer surrounds an outer circumference of the metal layer. 1% to about 30% of a humectant selected from the group consisting of butylene glycol, pentylene glycol, and mixtures thereof; and an aqueous carrier; wherein the composition is substantially free of surfactants. With the configuration, the distortion of the subject can be corrected without manually adjusting a degree of correction, even in a case where the subject having sides is partially not contained in the captured image or the subject is not a document image.