This part of ISO 105 specifies a method for determining the resistance of the colour of textiles of all kinds and in all forms to dry-cleaning in perchloroethylene solvent. This method is neither suitable for the evaluation of the durability of textile finishes, nor is it intended for use in evaluating the resistance of colours to spot and stain removal procedures used by the dry-cleaner. This test covers colour fastness to dry-cleaning only; commercial dry-cleaning practice normally involves other operations, such as water spotting, solvent spotting and steam pressing, etc., for which other standard test methods are available if the full response to dry-cleaning of a textile is to be assessed. The presence of absorbed water in dry-cleaning solvent, or the presence of a detergent and water in a dry-cleaning solvent, are known to alter the colour fastness properties of some materials. This test requires the assessment of the material under test in a dry state, using solvent alone, within containers that do not contain water. Fastness to dry cleaning, without further qualification, means fastness to dry cleaning in perchloroethylene. However, if required, other solvents that are used for textile cleaning may be used.

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This part of ISO 105 specifies methods intended for determining the resistance of the colour of textiles of all kinds and in all forms to domestic or commercial laundering procedures used for normal household articles using a reference detergent. Industrial and hospital articles may be subjected to special laundering procedures which may be more severe in some aspects. The colour loss and staining resulting from desorption and/or abrasive action in one single (S) test closely
approximates to one commercial or domestic laundering. The results of one multiple (M) test may in some cases be approximated by the results of up to five domestic or commercial launderings at temperatures not exceeding 70 °C. The M tests are more severe than the S tests because of an increase in mechanical action. These methods do not reflect the effect of optical brighteners present in commercial washing products. These methods are designed for the detergents and bleach systems given. Other detergents and bleachsystems may require different conditions and levels of ingredients.

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This standard specifies a method for determination of colour change of the specimen by instrumental means as an alternative to the use of the grey scales.

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This test method is mainly applicable to natural and regenrated cellulose materials. A specimen of the textile is agitated in a solution of sodium or lithium hypochlorite.

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This part of EN 20105 specifies a method for determining the resistance of the colour of textiles of all kinds and in all forms to ironing and to processing in hot cylindres.

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