Sheet metal

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When sheet metal is known by knocking out thinly rolled metals or metal alloys , in particular gold alloys . Leaf metals have been used since ancient times.

The leaf metals can be classified as follows according to the common types:

Real gold leaf

"Shooting" of gold leaf
Gilding cushion in use

Usually named after the color, in the order of purity ( carat ) these are:

  • Eternal gold (pure gold, 24 carat)
  • Rose Noble Gold (23¾ carat)
  • Ducat gold (23 to 23½ carats)
  • Orange gold (22 to 22½ carats)
  • Lemon gold (18 carat)
  • Green gold (16 carat)

Faux gold leaf

Metal alloys whose color is supposed to imitate real gold.

  • Composition gold: Copper-zinc alloy, which is traded in books of 250 sheets, similar to real gold leaf. However, they are trimmed together with the tissue paper , so there is no paper edge protruding.
  • Orange metal leaf
  • Impact metal light orange
  • Metal leaf lemon

Other sheet metal

Silver leaf

Silver leaf is traded in its pure form in books similar to real gold leaf. However, it is thicker than gold leaf. Because of its sensitivity to the sulphurous trace gases in the atmosphere , which turn it black, it is rarely used. It must be treated with a colorless varnish to protect it from tarnishing. Today, aluminum leaf is commonly used as a substitute for silver leaf.

The following leaf metals were also used as silver substitutes in the past:

  • The tinfoil is finely beaten tin . Since it is more volatile than sheet aluminum, it is no longer used as a mooring metal.
  • Faux silver: As an alloy of tin and zinc, it is no longer on the market.

Sheet aluminum

Traded as rolled aluminum in books or irregular sheets of paper.

swell

  • Kurt Sponsel, Wilhelm O. Wallenfang, Ingo Waldau: Lexicon of Painting Technology 1. 8th Edition, Callway Munich, 1987, ISBN 3-7667-0853-8 , p. 389ff.

reference books

  • Frank Lohfink: Gilding with leaf metal. Christophorus-Verlag, 2007, ISBN 3332019139 .

Individual evidence

  1. ↑ Wilhelm Theobald: The production of leaf metal in ancient and modern times: technological-historical treatise. Phil. Diss. Hanover 1912.