Lab Testing
We are passionate about producing fabrics ethically and sustainably. All the linens we use are produced by weavers locally in Northern Ireland before being brought to our factory in Mid Ulster for processing and printing.
To ensure the best possible performance and consistency William Clark has laboratory size padding, coating and drying facilities which it employs during development and ongoing quality control. Tests can also be performed in house on flame retardancy, stability and colour fastness. The majority of our tests are performed in accordance with regulatory standards.
William Clark employs laboratory and management staff with many years of experience in testing of textiles and related products, our work is verified by exterior certified laboratories when required.

The list below outlines the main areas of testing but is not exhaustive and we invite inquiries regarding testing in other related areas:
- Physical tests on the fabric
- Colour testing
- Quality testing
- Wear and tear on fabrics
- Dimensional stability and durability of fabrics
- Measurement of chemicals and durability of fabrics
- Measurements of chemical properties e.g. pH conductivity
- Flame retardancy
- Water repellence
- PH
- Physical test on fabrics including strength, thickness and mass