Graphic Chemical tubes are tested with a "tooth-pick". We take the tube cap off and insert the tooth-pick a few cm. We take it out. If the ink stick to the tooth-pick, the tube passes the test. This is not a warrantee of any kind. We do not take any responsability for the quality of the ink. The "tooth-pick-test" is nothing more than a first selection method. The inks may be a bit stiff. If so, smoothen the ink with some drops of linseed oil. Please do not buy these "old stock" ink if you have no experience with handling ink. |