They are often produced in bigger sizes than pressed batts; these are often used by industries such as the glass business. Versions with thinner partitions are also out there. Glazes will soak in to the porous surface of the silicon carbide shelf. I've often put kiln clean on them in https://cantileverpaddles58036.blogacep.com/34388565/not-known-details-about-silicon-carbide-nonlinearity