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Test Method:ISO-105-BO2
This test is use to check the effect of light on the Fabric.
In this test method the light source is Xenon Lamp. But this machine is very costly so we use the murcarry lamp.
The results of light fastness depends on the type of dyes and the depth of the shade.
Usually light fastness of light color is poor.
If the customer requires the high light fastness rating then we have to use the dyes range with high light fastness properties which is a costly range and increases our dye cost. So it depends on the customers requirements and the final rates of dyeing. So always take care to finalize the required results. The maximum achievable results for normal Dyes range are:
Maximum achievable results are:
For Pigment Printed fabric:
- Dark Colors:4-5
- Medium Colors:4
- Light Colors:3
- On gray scale rating
For Reactive and Reactive + Disperse Dyed Fabric
- Dark Colors:4
- Medium Colors:3
- Light Colors:2
- On Gray Scale rating
For OBA white Bleached fabric
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3 to 3-4 on gray scale rating.
Direct Dyes
The light fastness properties of normal direct dyes are very poor .So never try to commit the light fastness of direct dyes more than 2-3 on gray scale ratings.
If the customer required high light fastness in direct dyed fabric we have to chose specific high light fast dyes. |
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