Textile testing is carried out to highlight variations from agreed or required product specifications. However, meaningful and valid results are only generated if adequate steps are taken to reduce all variables to a minimum. That means not only using calibrated instruments, but also using standards-compliant Test and Reference Materials. Buying James Heal products is your guarantee of ‘quality’ and ‘fitness for purpose’, consistent with our reputation for designing and manufacturing world class instrumentation. Here, Test and Reference Materials are listed by reference to the instruments with which they are used.