This has been up a few times, tho I suppose the English terms are used. Harpiks solvent is a clumsy formulation on my part... but it is dilluted Harpiks.... or Rosin dilluted (in alcohol I believe). For anyone who has the slightest doubt about the terms resin and rosin I submit the following : Rosin NOUN: A translucent yellowish to dark brown resin derived from the stumps or sap of various pine trees and used to increase sliding friction, as on the bows of certain stringed instruments, and to manufacture a wide variety of products including varnishes, inks, linoleum, adhesives, and soldering compounds. TRANSITIVE VERB: Inflected forms: ros·ined, ros·in·ing, ros·ins To coat or rub with rosin. ETYMOLOGY: Middle English, variant of resin. See resin. Resin NOUN: 1. Any of numerous clear to translucent yellow or brown, solid or semisolid, viscous substances of plant origin, such as copal, rosin, and amber, used principally in lacquers, varnishes, inks, adhesives, synthetic plastics, and pharmaceuticals. 2. Any of numerous physically similar polymerized synthetics or chemically modified natural resins including thermoplastic materials such as polyvinyl, polystyrene, and polyethylene and thermosetting materials such as polyesters, epoxies, and silicones that are used with fillers, stablizers, pigments, and other components to form plastics. TRANSITIVE VERB: Inflected forms: res·ined, res·in·ing, res·ines To treat or rub with resin. ETYMOLOGY: Middle English, from Old French resine, from Latin rsna, from Greek dialectal
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