long-oil varnish

long varnish, long-oil varnish

An oleoresinous varnish containing 20 to 100 gal oil per 100 lb (2 to 10 liter oil per kg) gum or resin; more durable, more flexible, less glossy, and softer than short-oil varnish.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.