Chris Campbell Posted November 8, 2014 Report Share Posted November 8, 2014 I am making a solid clay hump mold for an elongated oval tray. I am doing it with cut out paper shapes on each side so I have top and bottom ok ... But ... how do you get both sides with the same angle on the slant? I guess 'close enough' keeps it looking hand made, but I am sure some of you have ways of doing this well. Link to comment Share on other sites More sharing options...
Chilly Posted November 8, 2014 Report Share Posted November 8, 2014 Cut a piece of card the profile you want, and use it to check both sides are the same? Link to comment Share on other sites More sharing options...
Mark C. Posted November 8, 2014 Report Share Posted November 8, 2014 Fold paper in half cut. Both sides will be equal Mark Link to comment Share on other sites More sharing options...
Crusty Posted November 8, 2014 Report Share Posted November 8, 2014 Not long ago on CAD there was a lady making a dish like your talking about with out a hump mold.. she compressed the center with the edge of her hand.. maybe that video can help ya out... I also seen a guy do what Mark said then he transferred the paper to cardboard , its more rigid... Link to comment Share on other sites More sharing options...
Marcia Selsor Posted November 8, 2014 Report Share Posted November 8, 2014 I had illustration for making an oval hump mold in PMI. You put a piece of paper on top of a board. hammer in 2 nails and put a string tied in a loop longer than the distance between the 2 nails. Use a pencil to pull the string around the loop while tracing a line onto the paper. You can adjust the size by moving the nails or tightening or loosening the string. Link to comment Share on other sites More sharing options...
Chris Campbell Posted November 8, 2014 Author Report Share Posted November 8, 2014 I am trying to make both sides ... A to B ... be at the same angle. I have a tool to do a 45 degree, but was hoping for others. A____________ / B /________________ Link to comment Share on other sites More sharing options...
Marcia Selsor Posted November 8, 2014 Report Share Posted November 8, 2014 Here is info to find the article. I attached material to the oval frame I made with the previously mentioned method. Then I stretched material over the framed and stapled it loose enough to sag when filled with plaster. The sides were pretty similar. Title: Over the HumpAuthor: Marcia Selsor Creating and using oval drape molds. Pages: 31-34Pottery Making IllustratedVolume: 11Issue: 3Issue Date: May/June 2008 Artists work shown: Marcia Selsor Link to comment Share on other sites More sharing options...
Colby Charpentier Posted November 8, 2014 Report Share Posted November 8, 2014 Andrew Martin uses two masonite cut outs with a smaller block holding them together. The profile can then be formed in clay with a rib, using the masonite as a guide. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted November 9, 2014 Report Share Posted November 9, 2014 I have been doing that too , to avoid carrying solid plaster to workshops. Just slump the slab sandwiched between the two ovals. Rib it into shape. Very simple. Marcia Link to comment Share on other sites More sharing options...
Pres Posted November 9, 2014 Report Share Posted November 9, 2014 Last year my granddaughter was making an elongated slab platter for asparagus or sushi. I made a cut paper template. Traced on 1/2" plywood, cut the angle on my miter saw, traced the wide bottom on a second piece, then glued/nailed two pieces together for on inch walls. Worked well. Link to comment Share on other sites More sharing options...
Chris Campbell Posted November 9, 2014 Author Report Share Posted November 9, 2014 Thanks all ... Going to try again using these template ideas. Thinking I could even extrude some shapes to lie along the sides for variety. Link to comment Share on other sites More sharing options...
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