the question was, is the ink acidic? i figure you should test it yourself. i seriously doubt it is for certain reasons. mainly because it would corrode the metal parts of the head causing head failure. the links were so that you could see the main ingredients. if the discussion is will this ink be qualified as archival, i've looked all over. no data, no hellmuth testing, nada. these inks will probably fade before canvas degrades with or without the acid. you can do fine art with them but don't guarantee the work from ever fading. i've got a $30,000 piece that i am working on and the whole issue is giving me the willies. some of these pieces will be in buildings way after i die. we need more archival testing on solvent ink... at present, i've not seen any.