ForMatter/Finishes/coating/Gold leaf (gilding)
finish_coating_gold_leaf

Gold leaf (gilding)

coating · polished · gilding, gold leaf, patent gold, loose-leaf gold, moon gold

Gold beaten to translucent thinness — 0.1 µm or less — and laid onto a sized substrate with a soft brush, then burnished or left matte. The classic finish on illuminated manuscripts, picture frames, dome interiors, signage, the foreground of a Klimt. Reads as the most reflective gold there is — paper-thin and irreplaceable.

Gold beaten by hand or machine to ~80–125 nm thick (the classical 23k–24k 'patent gold' for outdoor work; 22k for interior; lower karats for cheaper work). Substrate prepared with size — water-based (gilders' size, gum-ammoniac) for water-gilding, oil-based (oil-mordant) for oil-gilding. Leaf laid with a gilder's tip (static-attracted brush) or with patent-gold backing paper. Water-gilded surfaces can be burnished with an agate stone to mirror polish; oil-gilded surfaces stay matte. Outdoor longevity: 23k+ in protected location lasts 50+ years; 22k 30+ years; lower karats tarnish in months. Modern alternatives (composition leaf, brass leaf) read similar but oxidize.

character — translucent mirror-gold, paper-thin, can be burnished bright or left matte, archival.

Finish properties

  • levelpolished
  • subcategoryapplied metal-leaf gilding
  • applies towood, stone, metal, ceramic

Second life

reversibilitymoderate — most coatings can be stripped chemically (methylene chloride for paint, NaOH for some powder coats) or thermally / mechanically (sandblasting). Some specialty coatings (DLC, ceramic) require commercial-service strip.
blocks substrate recyclingno
renewabilityfield- to shop-renewable — most paint and clear coats can be touched up or re-coated in service; powder coat and PVD coatings require a coating-house re-application.

SSPC / NACE surface-coating standards; manufacturer technical literature for the specific coating chemistry.

Citations