This page has links to websites that have valuable information, tutorials and projects about making hollow forms in metal clay. You'll find projects to make metal clay hollow forms using some kind of support like cork clay or polymer clay and also unsupported hollow form projects.
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Unsupported Hollow Form Projects
Very useful tips and hints tutorial. Packed with great information, this is well worth a browse.
Nice tutorial from Joy using cork clay as a core and showing how to use up your less-than-perfect paste.
Interesting project to make a hollow pendant with no inside support. There are no pictures to illustrate this project which is a shame but it's still easy to follow. Shows the technique for using a lightbulb to make domed forms. For metal clay artists with a bit of experience.
This blog post covers some of tips and tricks for making curved forms which is also very useful for hollow form making.
Making Hollow Forms with Inside Support
Simple guide to working with cork clay.
Useful step-by -step guide about how to make hollow metal clay beads using cork clay.
Simple instructions and safety tips on using cork clay to provide an armature or support for a metal clay project.
Use cotton spheres to make these round beads.
Wonderful tutorial showing how to make a stunning pendant using cork clay to make a core. Easy instructions and very good pictures.
Pretty pendant made over a cork clay centre. Nicely illustrated.
Lots of useful tips and hints from Janet Alexander at PMC Connection.