Quality Control

Walker Ceramic pride ourselves on the quality of our products and after-sales service. We provide full technical backup and we are happy to assist clients to develop products to their specific requirements. All of our products are tested in our laboratory prior to release for sale.

We use the following testing procedures to maintain our high standards:

Test Room
Batches of clay and glaze are routinely tested thoroughly before distribution.
The expansion of the body or glaze is automatically graphed whilst the sample is heated at a set rate. The samples are small bars which have been pre-fired to the recommended firing temperature. This test confirms clay/glaze fit.
Moisture Content Tester
To rapidly determine the percentage of moisture content of a material.
Gallenkamp  Torsion  Viscometer
To test the fluidity and thixotropy of slips. This is a very important test to ensure the slips will pour, cast and drain well.
Gradient  Furnace
This is to test bodies and glazes over a temperature range to a maximum of 1325°C in the one firing. The rate of temperature rise and soaking time is automatically  controlled. The kiln fires 10 separate samples with about 30°C temperature difference between each, thereby we have an accurate firing history of water absorption, shrinkage and colour over a 300°C range to over the body’s maximum temperature. The test samples are then compared to our standard results.

Other  test  equipment  includes  an  Automatic  Drier,  Ford  Cup  and  Walker  Fluidity  Cylinders,  Ball  Mills,  High  Speed  Rapido  Mills,  High Speed Shear Agitators, Sieve Testing Screens and test kilns. Standards for all clays, glazes, colours and raw materials are kept for reference. An important part of the daily program in the laboratory is time spent in research and development.

The late Geoffrey Walker, the founder of Walker Ceramics, with his son David in the laboratory.

The late Geoffrey Walker, the founder of Walker Ceramics, with his son David in the laboratory.