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Files Catalogue (16)
Each other files(YELLOWING)

  ISO 105-X18-2007 Textiles - Tests for colour fastness - Part X18 phenolic yellowing [2014-7-17]

  SATRA test methods  catalogue – June 2011 [2012-7-22]

  Quality Assured Consumables [2012-7-5]

Each other products(YELLOWING)

Courtauld test- James H.Heal Control Fabrics 706-709
11-Y 706-709

Courtauld test- James H.Heal BHT-Free Polythene Film 706-792
11-Y 706-792

Courtauld test- James H.Heal Impregnated test paper 706-708
11-Y 706-708

      All files      Technology file     View information :


Date : 2012-7-5
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Description :  

Perspirometer AND INCUBATOR

The Perspirometer applies a specified pressure to a package of test specimens separated by acrylic or glass plates. The spring loaded mechanism ensures the correct pressure is maintained when the loading Weight is removed. Two loading Weights are available to accommodate the requirements of the ISO and AATCC test methods.

Manufactured from high grade stainless steel, the Perspirometer is rigid and corrosion resistant.

The Incubator provides, and accurately maintains, the controlled environmental conditions for the duration of the test specified by the standards.

ISO Certificates of Calibration are available which provide validation of instrument performance and specification.

Phenolic Yellowing

This is a simple, predictive test, typically used to assess the potential of white or pastel-coloured textiles to transit or storage yellowing. The test is specific to phenolic yellowing, that is the discolouration of textiles caused by the action of oxides of nitrogen on yellowable phenols. It is not intended to deal with the many other causes of discolouration, e.g. the migration or fading of optical brightening agents, gas fume fading, the oxidation of fabric lubricants and so on.

Based on a technique originally developed by Courtaulds Research, the HEALS Phenolic Yellowing Test Kit has proved to be an effective means of controlling the quality of white and pastel-coloured goods and has considerably reduced the incidence of yellowing complaints arising from storage yellowing.

Launched in 1995, the HEALS Phenolic Yellowing Test Kit has since become established as the benchmark industry standard and is widely specified by a number of major retailers.

The risk of phenolic yellowing is evaluated by a contact test. Each test specimen is folded between a phenol-impregnated test paper. The test package consists of 5 test specimens and one standard control fabric wrapped and sealed in BHT – free polythene film. Constant pressure on the package is maintained by the Perspirometer, and the specified environmental conditions are provided by the Incubator.

On removal from the Incubator the specimens are compared with their originals and the intensity of yellowing assessed using the standard Grey Scale for Staining.

M&S C20B
TESCO TM/137/01

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