- Civil Lab Mechanical Lab Engineering Lab Equipments
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CAT NO: DIDACTICNLE-Export-390015
Exposure Rack For Testing Lab Workshop.
Exposure Rack - For Testing Lab
All dyed materials experience change in colour when exposed to daylight
for a sufficiently long period because of the action of daylight on
pigments used in them. The severity of exposure in both time and
intensity of daylight determines the extent of change in colour.
The
colorfastness of any fabric is denoted by the number of the light
fastness standard fabric that has changed colour to the same extent as
the test specimen after a specified degree of exposure. It is expressed
as the numerical rating for light fastness.
The Exposure Rack is
designed to test colorfastness of textile and leather materials to
daylight. The test is carried out by exposing a set of light fastness
standard fabrics 1 to 8 and a set of test specimens to daylight till the
desired fading of the colour of the either the test specimen or light
fastness standard 7 is obtained.
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