jrgpots Posted January 1, 2016 Report Share Posted January 1, 2016 I really love the fern-like patterns of mocha diffusion slip technique. I had an idea using this technique and wondered if anyone here had ever tried it. My idea it this: 1. Throw a very thin translucent vessel. 2. Apply mocha slip to the outside. 3. While the slip is still wet, apply small amounts of a mild acidic solution which has no stain or colorant. The dendritic effects will form without any colorants. So, this is my question.....if the vessel were then fired, would the dendritic pattern show up as a translucent fern pattern where the slip had been etched away? If anyone has tried this, please share. John Baymore has said that just about everything has been tried already. If so....would this work? Jed Link to comment Share on other sites More sharing options...
Tyler Miller Posted January 2, 2016 Report Share Posted January 2, 2016 Unless I'm mistaken, I thought the colouring oxides were part of the dendrite formation? No harm in trying, though. Link to comment Share on other sites More sharing options...
oldlady Posted January 2, 2016 Report Share Posted January 2, 2016 i think your question should be "why wouldn't it work"? probably come out something like a white on white painting or fabric. show us when you do it. Link to comment Share on other sites More sharing options...
Babs Posted January 2, 2016 Report Share Posted January 2, 2016 Yeh, do it jrgpots and show us the results. SO the diffusion of the "mocha" actually repels the clay in the jagged pattern ?, and so the light may just well shine thro". Great idea. Link to comment Share on other sites More sharing options...
Dick White Posted January 2, 2016 Report Share Posted January 2, 2016 As others have said, try it and see. In my limited experience playing with the technique for students (just to show them, not claiming any serious expertise other than it worked for the students), I didn't notice any particular displacement of the slip by the colored acidic solution.It is just a very very very localized flocculation condition that carries the colorant between the alkaline clay particles. Link to comment Share on other sites More sharing options...
jrgpots Posted January 2, 2016 Author Report Share Posted January 2, 2016 I think I will get there in baby steps. 1. Do a successful traditional mocha diffusion with colorants so I know I'm getting the fern-like pattern. 2. Then try using a very light blue slip over white clay body and no colorant to see if the white clay body is visible. 3. If the second trial works, then I will do the white slip over translucent porcelain and no colorant in the mocha mix. Jed Link to comment Share on other sites More sharing options...
Min Posted January 2, 2016 Report Share Posted January 2, 2016 docweathers (Larry) has done a lot of testing with mocha diffusion, haven't seen him on the forum for a bit but maybe send him a PM? He tries just about anything and everything so maybe he's had a go at what you are going to test? Link to comment Share on other sites More sharing options...
bciskepottery Posted January 2, 2016 Report Share Posted January 2, 2016 There is chapter on mocha diffusion in Robin Hopper's book "Making Marks". Link to comment Share on other sites More sharing options...
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