Last night I tried to make a Nerikomi style rose following the link from Youtube: www.yuotube.com/watch?v=ihhFSTGBots . I used two different clays (Laguna electric brown and Moroacan sand) that I thought had about the same % shrinkage ( 12% and 12.5% plus or minus 2%) with drying. I made a large rose pattern which ended up being about 7 inches in dia. It looked great. I cut the cane into 2 parts and set each over a hump mold, turned the outside of each on the wheel and trimmed them up. They looked great. However, 3 hours later they started to crack along the joint lines. This AM they have completely fragmented.
Here are my questions:
1. How can I tell if both clay bodies are equally hydrated? (I am assuming they broke apart because of this.)
2. Do you use slip to attach/glue the different pieces together? (I did not, since the demo on youtube did not. Would it have changed anything?)
3. Would I be best served to use the same clay body and mason stains instead of different clay bodies?
4. Had I sealed the cane in a plastic bag with a few tsp of water and allowed all the clay to come to an equal hydration point, would it have cracked upon drying?
Marcia, I know you do this type of Nerikomi cane art. Do you have any tips?