black varnish

black varnish

also called  Japan,  

      any of a class of oil varnishes in which bitumen (a mixture of asphaltlike hydrocarbons) replaces the natural gums or resins used as hardeners in clear varnish. Black varnish is widely used as a protective coating for interior and exterior ironwork such as pipework, tanks, stoves, roofing, and marine accessories. The bitumen forms a protective barrier against atmospheric corrosion. Bitumens used include petroleum bitumen; natural asphalts, such as uintaite; and pitches, as from coal tar.

      The cheapest black varnish is Brunswick black, a solution of bitumen in white spirit. In coachbuilders' black japan, only the purest grades of asphalt or pitch are used, together with a hard gum, such as copal. Berlin black has a matte or eggshell finish, achieved by incorporating a proportion of vegetable or other carbon black. See also japanning.

* * *


Universalium. 2010.

Нужна курсовая?

Look at other dictionaries:

  • black-varnish tree — noun : a Burmese tree (Melanorrhoea usitata) that yields a black varnish called also theetsee …   Useful english dictionary

  • Black varnish — Чёрный лак …   Краткий толковый словарь по полиграфии

  • Varnish — Var nish, n. [OE. vernish, F. vernis, LL. vernicium; akin to F. vernir to varnish, fr. (assumed) LL. vitrinire to glaze, from LL. vitrinus glassy, fr. L. vitrum glass. See {Vitreous}.] [1913 Webster] 1. A viscid liquid, consisting of a solution… …   The Collaborative International Dictionary of English

  • Varnish tree — Varnish Var nish, n. [OE. vernish, F. vernis, LL. vernicium; akin to F. vernir to varnish, fr. (assumed) LL. vitrinire to glaze, from LL. vitrinus glassy, fr. L. vitrum glass. See {Vitreous}.] [1913 Webster] 1. A viscid liquid, consisting of a… …   The Collaborative International Dictionary of English

  • varnish tree — 1. any of various trees yielding sap or other substances used for varnish, as Rhus verniciflua, of Japan. 2. an Asian tree, Koelreuteria paniculata, of the soapberry family, having showy clusters of yellow flowers from 12 to 18 in. (30 to 46 cm)… …   Universalium

  • Brunswick black — ▪ varnish       quick drying black varnish used for metal, particularly iron, stoves, fenders, and surfaces of indoor equipment. Because of its bitumen content, the coating is highly protective and the finish is attractive and reasonably durable …   Universalium

  • Black Ice (album) — Black Ice …   Wikipedia

  • Black Ridge Canyons Wilderness — Infobox protected area | name = Black Ridge Canyons Wilderness iucn category = Ib caption = locator x = 76 locator y = 81 location = Colorado and Utah, USA nearest city = Grand Junction lat degrees = 39 lat minutes = 06 lat seconds = lat… …   Wikipedia

  • varnish — I (New American Roget s College Thesaurus) n. shellac, lac, lacquer; spar; gloss, mitigation, whitewash, excuse. v. t. shellac, lacquer, etc.; palliate, glaze, gloss, excuse, whitewash; finish. See smoothness, covering. II (Roget s IV) n. Colors… …   English dictionary for students

  • Black gum — Gum Gum, n. [OE. gomme, gumme, F. gomme, L. gummi and commis, fr. Gr. ?, prob. from an Egyptian form kam?; cf. It. {gomma}.] 1. A vegetable secretion of many trees or plants that hardens when it exudes, but is soluble in water; as, gum arabic;… …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”