testing methods

You can choose from the following testing methods:

HVI Testing

Our High Volume Instrument (HVI) is capable of providing measurement of the following parameters, as well as standalone testing at a reduced fee:

• length (UHML) and uniformity index (UI)
• micronaire
• strength (g/tex) and elongation
• colour (reflectance Rd, yellowness +b) and colour grade
• trash (% area, trash count) and trash grade
• short fibre content and maturity index

Nep Testing

The Laboratory has a nep testing module measuring the number of neps per gram of cotton. A reduced nep count improves the spinning performance and yarn quality.

Trash Testing

We have a Shirley Analyser that measures the trash content by weight in a cotton sample. This testing method is suitable for merchants and spinners who specify an exact trash content allowance for the shipment in their contract.

Chemical Sugar Testing

We offer a chemical sugar testing service that measures the percentage of sugar in the raw cotton sample.

Micronaire

Micronaire testing can be conducted on either the HVI or the Sheffield Micronaire Tester. Comparisons between the two instruments show that the results are correlated.

Moisture Testing

Moisture testing is used to determine either the moisture regain value or the moisture content of cotton.

Pressley and Stelometer

To test fibre strength, we continue to provide Pressley and Stelometer testing, as there is still a demand from merchants and spinners to use this facility.