Sun fading, how does it work?

[Artemesia's Garden]

Does anyone know how sun fading works on yellow discolouration? It's so odd that it works on some characters and makes other characters even worse!

I know one theory of how the discolouration comes about (bromine used as a fire retardant) but the fact that the effects of UV can have such different results on discolouration is very interesting.  And frustrating of course!

[glitterball]

It would be great to predict what will happen to a certain off-white pony and whether it would turn white or go creamy - I have a couple that need lightening... but am a bit worried that they will go tan!

I do also have a Gusty that faded beautifully to a bright white after an oxy-wash and sitting on the windowsill for a few weeks 

[MangleCrafter]

I'm honestly scared of any sun touching my ponies. Especially Majesty, since she is displayed in my balcony along with her castle. When i fade ponies, i usually like the hydrogen peroxide method. It makes the hair rough and nasty, but nothing a little conditioner and shampoo can't fix. This thread will help on who you shouldn't sunfade:
http://mlparena.com/index.php/topic,336125.0.html

[Artemesia's Garden]

I feel he same way, I try to buy them in good shape and then keep them out of the sun. My Majesty has hardly seen the light of day so her head is still a bright white. I have a blanket over my cabinet most of the time.

I've done it on a few occasions on safe ponies but not for more than a few days. It can freshen up a dingy pony I find it's great on the blue ones as well like Wind Whistler. But I'm really looking for the scientific explanation.

[shabbychicdee]

its the same reason why the sun makes my hair go blonde (im usualy light brown/auburn in winter) and a lot of others.
its like bleach and can also brake down things and rot stuff like carpet, cloths etc. UV rays.
 Sun fading is much better here as we are lacking an ozone layer and bad pollution, i once whitened a brown birthflower pony one day in winter, i was very shocked but it happened.

oh yeah and also the perfume scented ponies can go browner like with the flame-retardant. 

[glitterball]

Sun fading is much better here as we are lacking an ozone layer and bad pollution, i once whitened a brown birthflower pony one day in winter, i was very shocked but it happened.

OMG - so sunny - does that make you think about having to wear suncream in winter??

[Artemesia's Garden]

I'm honestly scared of any sun touching my ponies. Especially Majesty, since she is displayed in my balcony along with her castle. When i fade ponies, i usually like the hydrogen peroxide method. It makes the hair rough and nasty, but nothing a little conditioner and shampoo can't fix. This thread will help on who you shouldn't sunfade:
http://mlparena.com/index.php/topic,336125.0.html

Thank you!!x