BS 5377-2:1990
Current
The latest, up-to-date edition.
Assessment of laundering effects by means of a cotton control cloth Methods of analysis and test for the unsoiled cotton control cloth
Hardcopy , PDF
English
30-04-1990
National foreword
Committees responsible
Method
Introduction
1. Scope
2. Normative references
3. Selection of specimens and samples from test pieces
4. Determination of intrinsic greying (greying
measured in the absence of ultraviolet radiation)
5. Determination of intrinsic yellowing (yellowing
measured in the absence of ultraviolet radiation)
6. Determination of increase in organic deposit content
7. Determination of increase in incineration residue
(ash)
8. Determination of overall decrease in breaking
strength (total wear)
9. Determination of decrease in breaking strength
resulting from chemical degradation of cellulose
due to laundering (chemical wear)
10. Determination of decrease in breaking strength
resulting from mechanical factors in laundering
(mechanical wear)
11. Test report
Annexes
A. Determination of increase (or decrease) in degree
of whiteness
B. Determination of chemical wear based on variation
in average degree of viscometric polymerization in
an ammonium copper (II) hydroxide solution
C. Determination of chemical wear based on variation
in average degree of viscometric polymerization in
a copper (II) di(ethylene-diamine)(Cuen) solution
D. Grey scale and measurement of reflection
Tables
C.1 Limiting viscosity number as a function of the
viscosity ratio increment
D.1 Untitled
Figures
1. Viscometer
2. Supporting tube for viscometer
B.1 Mean degre of viscometric polymerization as a
function of fluidity value
C.1 Examples of vessels for dissolution of cellulose
C.2 Curve showing the variation in the viscosity ratio
increment of cellulose solutions in Cuen solution
as a function of the product of the limiting
viscosity number and the cellulose concentration
in the solutions
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