Finally we organized results of Yellowing test and want to share the result with you all.

The upper torso was exposed on direct sunlight, outdoor, for 50 days. We have attached 5 stickers to the back of the torso and took one by one after 10 days. Square part marked as No. 1 wasn't exposed to sunglight at all the No. 6 was exposed for 50 days. The experiment was done on Glow Peach Gold skin and torso was layed at the roof where there was no shade. During the experiment it was sunny (more than 40 days), rained, snowed so it was also exposed on various weather condition.

As you can see by the result, skin color has turned yellow but it didn't turned green or changed dramatically. At first, red color vanished slowly and after some time color started to turn yellow. And after 50 days, there was no more color change so we stopped the experiment.

Even though the new Glow skin is strong to UV rays it is impossible to block it 100% so if the doll is exposed to direct sunlight it will turn yellow. But as you can see by the result, at first red color vanishes slowly and then start turning yellow after quite a long time. So if you don’t expose the doll to direct sunlight for long time you will be able to keep your doll in beautiful skin color like when you first bought the doll.

Also even a very light, thin cloth can block UV so if you keep your doll dressed or put a cape, it will be very helpful from preventing yellowing. Finally air is another factor which accelerates yellowing. So if you keep the doll in a box and store it in a dark place, it will prevent from turning yellow.

If you have any other question regarding the experiment, please leave a message on Q&A board.