Transmutation Splitter on a Weapon Skin
If you are only interested in the skin of the item and not it’s stats, you can just use two trans stones, a white item and the item you want you want to use it on. White trans crystals are cheaper than the splitters, anyway.
As Zeivu said, if you want to save the skin, use transmutation stones/ crystals to a white item (cheaper anyways).
Transmutation splitters only give you the two original weapons (armors) back. So it doesn’t split skin and stats and sigil and it doesn’t work on “skinned” weapons (armors), since it doesn’t origin from two weapons (armors).
As Zeivu said, if you want to save the skin, use transmutation stones/ crystals to a white item (cheaper anyways).
Transmutation splitters only give you the two original weapons (armors) back. So it doesn’t split skin and stats and sigil and it doesn’t work on “skinned” weapons (armors), since it doesn’t origin from two weapons (armors).
That is not the case.
https://forum-en.gw2archive.eu/forum/info/updates/Game-Update-Notes-September-3-2013/2761943
The Transmutation Splitter is now available in the Consumable category for 300 gems each, 5 for 1350 gems, or 25 for 6000 gems. Transmutation Splitters will return the two current source items from any transmuted item and will also return an applied upgrade separately. All items returned from splitting a transmutation are soulbound. Items using a skin will return a base item with the original appearance. Another Transmutation Stone will be required to reapply the skin.
So it does work with skinned weapons and it does return the sigil.