ISO 1833-3:2019

ISO 1833-3:2019 pdf free.Textiles一Quantitative chemical analysis -Mixtures of acetate with certain other fibres (method using acetone).
1 Scope
This document specifies a method, using acetone, to determine the mass percentage of acetate, after removal of non-fibrous matter, in textiles made of mixtures of
— acetate with
— wool, animal hair, silk, regenerated protein, cotton (scoured, kiered, or bleached), flax (or linen), hemp, jute, abaca, alfa, coir, broom, ramie, cupro, viscose, modal, polyamide, polyester, acrylic, elastolefin, elastomultiester, melamine, polypropylene/polyamide bicomponent, polyacrylate and glass fibres.
It is not applicable to mixtures containing modacrylic fibres, nor to mixtures containing acetate fibres that have been deacetylated on the surface.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 1833-1, Textiles — Quantitative chemical analysis — Part 1: General principles of testing
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at
— IEC Electropedia: available at
4 Principle
The acetate is dissolved out from a known dry mass of the mixture, with acetone. The residue is collected, washed, dried and weighed; its mass, corrected if necessary, is expressed as a percentage of the dry mass of the mixture. The percentage of acetate is found by difference.
5 Reagents
Use the reagents described in ISO 1833-1 together with that described in 5A.
5.1 Acetone.
NOTE The boiling point of acetone is 56°C.
6 Apparatus
Use the apparatus described in ISO 1833-1 together with that described in i.
6.1 Conical flask, minimum capacity 200 ml, glass-stoppered.
7 Test procedure
Follow the general procedure described in ISO 1833-1, and then proceed as lollows.
To the specimen contained in the conical flask, add 100 ml of acetone per gram of specimen and shake the flask. Allow it to stand for 30 mm at room temperature, stirring from time to time, and then decant the liquid through the weighed filter crucible.
Repeat the treatment twice more (making three extractions in all), but for periods of 15 mm only, so that the total time of treatment in acetone is 1 h. Wash the residue into the filter crucible with acetone and drain using suction. Refill the crucible with acetone and allow it to drain under gravity. Finally, drain the crucible using suction, dry the crucible and residue, then cool and weigh them.
8 Calculation and expression of results
Calculate the results as described in the general instructions of ISO 1833-1.
The value of d is 1,00 except for melamine and polyacrylate, for which d is 1,01.
9 Precision
On a homogeneous mixture of textile materials, the confidence limits of the results obtained by this method are not greater than ±1 percentage point for the confidence level of 95 %.
ISO 1833-3 pdf download.

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