stonegarden Posted November 12, 2011 Report Share Posted November 12, 2011 A short while back, one of the video posts showed a potter making a tray, using an adjustable wooden form, which looked sort of like wood clamps, though they appeared to be made for use by hand builders. They were similar in idea to the cottles used for forming the sides of plaster molds, but he was able to slide them, while adjoining sides were still connected, to adjust the shape to be square or rectangular, and of different dimensions. So, my question is, are these something he made, or are they commercially available? If they were made, does anyone have an idea how to do this, in order to keep the parts (inside and top surfaces) as smooth as possible, to avoid extraneous marks in the clay's exterior surface? If they are available commercially, could you point me in that direction? Link to comment Share on other sites More sharing options...
pricklypots Posted November 12, 2011 Report Share Posted November 12, 2011 The forms are available from bambootools.com. Link to comment Share on other sites More sharing options...
stonegarden Posted November 12, 2011 Author Report Share Posted November 12, 2011 You're a life-saver- thank you so much! Can't wait to try one out! Link to comment Share on other sites More sharing options...
Marcia Selsor Posted November 13, 2011 Report Share Posted November 13, 2011 I published an article in PMI re: Over the Hump ...molds. I have been using gravity rather than the plaster forms. It is easy to use and lighter to transport to workshops. I drop a slab over a broad rim cut-out and let the slab slump through the negative space on the wooden rim or frame of the shape. Combing the form with a rib is essential. Marcia Link to comment Share on other sites More sharing options...
clay lover Posted November 13, 2011 Report Share Posted November 13, 2011 I'm familiar with the concept of gravity and the drop through slump method. What do you mean by the term, 'combing the form with a rib;? I saw the tool mentioned today in a production potter's shop. He did not like it, said it was not well made and the joins where the sides come together have gaps and require much clean up of the slumped form on every angle change. Sort of like cleaning slip molded items. He plan to use it to pour different sized plaster molds and work from the plaster hump molds. He did think that approach for plaster molds would help him with sized sets that would stack inside each other . Link to comment Share on other sites More sharing options...
Marcia Selsor Posted November 13, 2011 Report Share Posted November 13, 2011 By "combing" the form, I refer to pushing the slab into the shape desired with a rib. Not sure who "he " is and what "he" didn't like. Are you saying he didn't like ribs? When I make hump molds, I staple cloth to a wooden rim or duct tape it to a trash can and pour plaster into the stretched cloth. The weight of the plaster will cause the cloth to stretch into a nice hump form. Marcia Link to comment Share on other sites More sharing options...
lynny Posted November 13, 2011 Report Share Posted November 13, 2011 By "combing" the form, I refer to pushing the slab into the shape desired with a rib. Not sure who "he " is and what "he" didn't like. Are you saying he didn't like ribs? When I make hump molds, I staple cloth to a wooden rim or duct tape it to a trash can and pour plaster into the streched cloth. The weight of the plaster will cause the cloth to stretch into a nice hump form. Marcia great tip Marcia! I'm making humps moulds tomorrow and was searching today for bowls to fill with plaster. I like this idea better Lyn Link to comment Share on other sites More sharing options...
Marcia Selsor Posted November 13, 2011 Report Share Posted November 13, 2011 This "tip" was an article I wrote for Pottery making Illustrated a few years ago. Marcia Link to comment Share on other sites More sharing options...
clay lover Posted November 19, 2011 Report Share Posted November 19, 2011 Marcia, The 'he' I was refering to is the man I met last week who had tried the adjustable hump mold. He had issues with it. I like the slumped cloth idea. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.