Quote Originally Posted by faris View Post
Possibly it's already been mentioned in this thread but in ONE fieldcraft or tradecraft quest (possibly miner. Unsure. Or even alchemist.) it is mentioned that the ink used to create grimoires is aetherically conductive.
It's the level 20 Alchemist quest. The explanation given there is:

Quote Originally Posted by Anonymous Arcanist
For an arcanist to weave his spells, he must conjure in his mind the image of distinct mystical diagrams known as arcane geometries. These geometries are inscribed upon the pages of a grimoire, such as the one you constructed at my request. The most important aspect of any grimoire is the quality of the ink used to illustrate its pages. Geometries drawn with ink that is especially conducive to the flow of aether allow the arcanist to more effectively channel his magic strength. Thus when one is in need of a new grimoire, one must turn to an expert in the making of this liquid gold--an alchemist. And, Thaliak be praised, I was blessed with the attentions of a true artist.
The descriptions of the inks themselves refer to it as well. They're "Enchanted <metal> Ink" with various types of metals for various levels (Enchanted Copper Ink, Enchanted Iron Ink, Enchanted Silver Ink, etc.) and the description of each is "Ink fortified with <metal> sand to improve aetherial conductivity." (with, obviously, the name of the appropriate type of metal there).