Carboxymethyl cellulose or cellulose gum is a cellulose derivative with carboxymethyl groups bound to some of the hydroxyl groups of the glucopyranose monomers that make up the cellulose backbone. It is often used as its sodium salt, sodium carboxymethyl cellulose.
CMC is an excellent film-forming agent and color fixing agent is applied in ground glaze and overglaze of ceramic tiles. As glaze is unstable suspending liquid, easy to precipitate, and thixotropic, so the use of CMC ingredients can strengthen the combining powder of glaze and blank.
In Ceramic Industry In ceramics, the special-type Sodium Carboxymethyl cellulose of green body helps to significantly increase the plasticity of pug and the flexural strength of green-ware bodies, as well as to reduce the breakage rate of green-ware bodies.
Sodium Carboxymethyl cellulose can also act as the humidity transducer in porous ceramics.