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Louvandrometer as per
IS:764:1979:GMP model GC-59 :-
The unique apparatus is used for determination of colour
fastness of all textile materials irrespective of there
composition & their form (yaru fibre etc.) to the action
of soap & sodium carbonate solution at 60 degree C .The
principle of this is that a specimen of textile in
contact with the pieces of specified adjacent fabric is
mechanically agitated in a soap soda solution rinsed &
dried & the hang in colour of the specimen & the
stirring adjacent fabrics are assessed with standard
grey scales. The apparatus consist of a Argon weld
Stainless Steel water bath containing a rotor with which
glass container flask of 500ml.capacity are rotated at a
speed of 40+_2 rev/min &thermostatically controlled
electrical heating device to heat the water bath so as
to maintain the temperature of test solution in
container at 60+_2 degree C.A mechanical timer of 30
minutes is fitted for time duration of test .A soap soda
solution is to be poured in flask after the temp
maintain to 60 degree C The given specimen is dropped in
glass flask & rotoris rotated at a 40rpm fixed for
30mints.The results are to be obtained & tested as per
specification. Digital temperature controller can be
given as option.
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