BS 6057-3.7:1995 Rubber latices. Part 3. Methods of test - Section 3.7 Determination of density of natural rubber latices
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This International Standard specifies a method for the
determination of the density of natural rubber latex
concentrate between the temperatures of 5 °C and
40 °C. The standard is intended for use when density
determinations are used to calculate the mass of a
measured volume of latex in locations where it is not
practical to weigh directly or to control the tempera-
ture of the laboratory. For such purposes, it is essen-
tial that the density be determined on a latex sample
containing the same amount of air as it contained
when the volume was measured. Therefore, the latex
bulk is allowed to stand for a minimum period of
24 h before sampling to ensure the removal of air
bubbles. The density determination is preferably
made at the same temperature as the volume
measurement, otherwise a correction must be ap-
plied.
This method is suitable for all latices from natural
sources, for synthetic latex and for compounded or
prevulcanized latex, as well as for artificial dispersions
of rubber; however, the temperature correction given
in 7.2 is not necessarily valid for all these.
For measurements made at standard temperatures,
ISO 8962:1987, Plastics Polymer dispersions
Determination of density should be used.
