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Ultraviolet test for Black anodising fade-resistance

Dear SIR,

WHAT TYPE OF ULTRAVIOLET TEST WE CAN CARRY FOR ULTRAVIOLET TEST FOR COMPONENTS ARE GETTING FADED COLOUR WHEN EXPOSE TO SUN LIGHT.generally WHAT TYPE OF TEST IS USED FOR SUCH TYPE OF PROBLEM.

KAMLESH BHATT
PLATING MANAGER - PUNE, MAHARASTRA, INDIA
August 5, 2009

First of two simultaneous responses --

Step 1 is to get the best fade resistant dye (they have ratings) and then give it an excellent seal.

I am not aware of a global test for fading, but you could design your own by using test cells with intense fluorescent lamps and another with a xenon lamp.

James Watts
- Navarre, Florida
August 6, 2009

Second of two simultaneous responses -- August 6, 2009

Kamlesh

Consider ASTM G23, ASTM G26, or ASTM D822. These are the test methods specified by MIL-A-8625 / MIL-PRF-8625 [⇦ this spec on DLA] for light fastness evaluation.

Willie Alexander
- Colorado Springs, Colorado

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