The solvent is from a recipe that is a rare drop especially since the patch it seems. It drops in Xibaluku it is lLayer Bound on pick up and it is an ALCHEMIST recipe. So a player that is an alchemist has to pick it up. Its called Tainted Alkahest. It requires Ebon Venom to make as well as Aqua Regia. This is the reason the potions are so costly on the Trader. I have a friend that can make it if anyone wants it to use let me know.
The problem I see with recipes in generals is that 1st they are scarce and second people get gold coins in their eyes when they see them so they need on it out of genuine greed without first seeing that its SOULBOUND. This means those that can actually use them don't get the recipe on many occasions.
I have the recipes for Bronze, Corinthiacum Decorative Zircite, Hepatizon, and Billon. These are parts needed for Culture armor. If anyone needs le me know and get the materials and I"ll whip some up for you in my laboratory. I am also a weaver but I cannot make any of the dropped cloth recipes yet. Same is with the skinner rares. I would like to farm for some of the recipes as well as the new ones that were released for gems and the alchemy transformation recipe.