Quality assurance

For us, quality assurance concerns the entire process chain from raw material extraction to delivery of the product to the customer.
The deposits are examined across the board for their suitability for extraction based on geoelectrical investigations and core drilling and divided into clay layers. When conveying in batches, types of clay are selected and homogenized. Clay samples both at the clay site and during storage ensure that the respective type of clay or clay mixture consistently meets the required properties.
During processing, ongoing quality control is carried out by taking samples, creating average samples and storing reserve samples. According to specification of data sheets or individually according to customer agreement, various parameters are determined in our own ceramic laboratory by our laboratory technician or sometimes in collaboration with external laboratories.

Typical parameters are:

• Chemical analysis using X-ray fluorescence analysis
• Mineral analysis
• Firing behaviour with water absorption, shrinkage, coefficient of thermal expansion, firing colour
• Plasticity according to Pfefferkorn
• Dry bending strength
• Pourability and body formation
• Grain distribution using Sedigraph or CILAS laser
• Raw colour
• Viscosity

Our company has a defined quality policy and is certified according to ISO EN 9001:2015. As part of the certification, we have established a continuous improvement process that affects the entire process chain and all areas of the company. In case of questions Mr. Arndt Nikolaus Loh is at your disposal (Tel. 02736/5097490).

We are ISO EN 9001:2015 certified!