Splitting

Refers to a phenomenon where a plastic clay develops cracks and splits open to relieve the self-support stresses it is subjected to. The process often occurs over a period of minutes. This typically happens on the bellies of thrown vases, rims of overhung bowls, on applied handles. This phenomenon is most pronounced in bodies having a particle size distribution exhibiting large percentages in the plus 100 mesh size range and where straight water is being applied to or left on the surface (the particles provide discontinuities in the surface where the water can enter). For example, if handles are being hand pulled from fresh clay and then applied immediately to the ware, the combination of water left on the surface and the weight of the handle itself will start at split at the point where the surface is being stretched the most. While meticulous avoidance of leaving water on any stressed surface can alleviate the problem on the bellies and necks of vessels, for handles it is generally better to pull handles first, and set them out to harden a little before applying them (using slip, not water). 

Out Bound Links

• (Tests) SADR - Sieve Analysis Dry
• (Tests) SIEV - Sieve Analysis 35-325 Wet

In Bound Links

• (Glossary) Plasticity

  This term is used in reference to clays (or more o...

• Login to a private account or work with others in a group account (e.g. university).
• Nothing to install (access it using your web browser). It is always the latest version.
• Easy to import your existing data.
• As many side-by-side recipes as you want.
• Many ways to search and classify glaze and body recipes.
• Glaze and body recipes are robust, with units-of-measure, unlimited pictures with individual titles and descriptions.
• Add variations to a recipe; each with its own pictures, descriptions and name/code-number extensions.
• Recipes can link to typecodes, projects and firing schedules (all managed in their own areas).
• Standard reports and mix ticket reports with last-minute-totalling; variations report as if they are a complete recipe.
• Video tutorials, help system, contact form on every page, dedicated messaging and support ticket systems.
• It is an industrial-strength database system (unlimited capacity, fast, reliable, scalable).

Imports many file formats

• Glaze recipe formats supported: HyperGlaze, GlazeGhem, GlazeMaster, Matrix, INSIGHT XML recipes (single and multiple), INSIGHT SQLite DB files.
• Assign a batch number to imports, and later search by batch.
• Assign multiple typecodes to imported glaze and body batches (to classify) and search on these later.
• Prepend character sequences to glaze recipe names during import.
• Import the pictures and pair them to their corresponding records automatically.
• One click to automatically export the database to an SQLite DB database file and download it (for use with desktop INSIGHT or just as a backup).
• Export and import individual glaze recipes as text or XML.