BS ISO 1833-27:2018 pdf free

BS ISO 1833-27:2018 pdf free.Textiles一Quantitative chemical analysis
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 1833-1:2006, Textiles一Quantitative chemical analysis一Part 1: General principles of testing
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
一ISO Online browsing platform: available at https://www.iso.org/obp
一IEC Electropedia: available at http://www.electropedia.org/
The cellulose fibres are degraded from a known dry mass of the mixture with aluminium sulfate and then heat treatment, but the residue remains without damage. The residue is collected, washed, dried and weighed; its mass is expressed as a percentage of the dry mass of the mixture. The percentage of cellulose fibre is found by difference.
Place the wet test specimen on the heated bottom plate of heating device (6.1) at 160 °C and press it by the heated upper plate at 160 °C with pressure a of (40±10) g/cm2 for 5t 2 min.
Shake the square-shaped bottle (6.3) containing the carbonized test specimen, 40 ml ~ 100 ml water and about 150 stainless steel balls (6.4) using mechanical shaker (6.2) vigorously for about 5 min.
Filter the contents of bottle through the standard sieve (6.5).
Insert 300 ml ~ 500 ml water into the bottle (6.3).
Rinse any remaining fibres in the bottle (6.3) with cold water.
Finally, filter the contents of bottle through the standard sieve (6.5), remove the stainless balls from the sieve (6.5), dry the sieve and residue, and cool and weigh them.
Examine the residue microscopically, or otherwise, as appropriate, to check that the treatment has in fact completely removed the carbonized cellulose fibre.
NOTE There are other methods to remove the carbonized fibre from the specimen, such as shaking the bottle (containing specimen and steel balls) vigorously up and down by hand or spraying water on the specimen with high pressure.BS ISO 1833-27 pdf download.