Tuesday, October 19, 2010

Progress on scabbard plates




so here are some images from the progress on the knife scabbard/hilt...they show the repousse/chasing in process...the initial form of the scabbard halves was developed with simple dies, and the hydraulic press...the design was then transferred to the face of the shaped blanks, and the lines to delineate the designs lightly chased in, over pitch. The piece was then turned over, sunk in pitch again, and repoussed, from the back, to punch up the design. This took about three rounds of repousse, to get it to a good height. then the design was chased down from the face side, modelling and detailing the surface.
 The third image is of the repousse tools...you can see that they are a range of sizes, and also radius...tho they all have that basic shape of a circle with about a third ground away...gives you straight edges, curves, and some corners...also note that they are rough...the largest very rough...this keeps them from bouncing around, and also is better for stretching the metal...imagine a polished tool hammered into metal...the metal slips on the polished surface, and in the resulting dent, the center of the dent the metal is thinner...but with a rough tool, the metal can't slip away so the metal thickness stays more consistent...and actually, though it seems like a good idea to have highly polished tools for the chasing, or front, a little tooth really helps there too, though not so rough...maybe a 320 grit finish...polishing will easily remove those marks, but even that slight tooth really helps keep the tool accurate and controlled. Pat

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