Glaze Residue Test in Sanitaryware Quality Control

Residue Test for Ceramic Raw Materials: Methods

Overview

Residue tests are performed on all received raw materials, as well as on slip and glaze. The sieve size varies based on the material being tested, and in some cases, multiple sieve sizes are used to understand the residue at each size.

Testing Procedure

Weigh 100 grams of the dry raw material and mix it with water to form a slurry.
Pour the slurry onto a standard sieve with the desired mesh size.
Begin washing the slurry with a gentle water spray to help pass the fine particles through the sieve while retaining the coarser particles.
Continue washing until the water passing through the sieve is clear, indicating that all fine particles have been removed.
Carefully transfer the residue (particles that did not pass through the sieve) to a dish.
Dry the residue in a dryer at 100°C until it reaches a constant weight.
Allow the residue to cool to room temperature in a desiccator to prevent moisture absorption.
Weigh the dried residue (W2).