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Encyclopedia > Metal leaf
Metal leaf processing
Metal leaf processing

Metal leaf is a thin foil used for decoration. It is also called Composition leaf or Schlagmetal. Metal leaf can come in many different shades. Some metal leaf looks like gold leaf but does not contain any real gold; this is often referred to as imitation leaf. Image File history File links Download high-resolution version (1793x1276, 1360 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Metal leaf ... Image File history File links Download high-resolution version (1793x1276, 1360 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Metal leaf ...

Contents

Process

The gold leaf industry is important in Myanmar.
The gold leaf industry is important in Myanmar.
Gold leaf is less than a micrometer thick (typically about 100 nm) and is delicate. Here we see a pack of 100 gold leaves with some gold coins. A puff of air crumpled the gold leaf. The value of each gold leaf is about $0.20

Metals that are made into metal leaf need to be highly malleable. They can be pounded into sheets well below a micrometre in thickness without breaking or tearing. The typical thickness of gold leaf is about 100 nanometres or 0.0001 mm[1]. When made by hand, small pieces of metal are placed between sheets of parchment and pounded repeatedly with wooden mallets. As the metal thins out, it forms large sheets. These sheets are divided and the process repeated. The final sheets of metal are trimmed, cut to various sizes, and sandwiched between sheets of paper to protect them. At a thickness of 100 nm one square metre of gold leaf corresponds to 0.1 cubic centimetre or just 2 grams of gold. In imperial measurements, one ounce (28 g) of gold corresponds to about 200 square feet (about 20 m2) of gold leaf. Image File history File linksMetadata Burma04_261. ... Image File history File linksMetadata Burma04_261. ... Image File history File linksMetadata Download high resolution version (1280x960, 318 KB) Summary Here we see a Gold British Sovereign (£1) on a gold chain, an American Liberty Dollar, three Swiss Vreneli coins (Fr 20), and a pack of 100 gold leaves bought from Bangkok, Thailand. ... Image File history File linksMetadata Download high resolution version (1280x960, 318 KB) Summary Here we see a Gold British Sovereign (£1) on a gold chain, an American Liberty Dollar, three Swiss Vreneli coins (Fr 20), and a pack of 100 gold leaves bought from Bangkok, Thailand. ... Malleability is a physical property of matter, signifying its capability of deformation, especially by hammering or rolling. ... A micrometre (American spelling: micrometer, symbol µm) is an SI unit of length equal to one millionth of a metre, or about a tenth of the diameter of a droplet of mist or fog. ... A nanometre (American spelling: nanometer, symbol nm) is a unit of length in the metric system, equal to one thousand-millionth of a metre, which is the current SI base unit of length. ... German parchmenter, 1568 Parchment is a material for the pages of a book or codex, made from fine calf skin, sheep skin or goat skin. ... A square metre (US spelling: square meter) is by definition the area enclosed by a square with sides each 1 metre long. ... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ... BIC pen cap, about 1 gram. ... The ounce (abbreviation: oz) is the name of a unit of mass in a number of different systems, including various systems of mass that form part of English units, Imperial units, and United States customary units. ... A square foot is by definition the area enclosed by a square with sides each 1 foot long. ...


Uses

Decoration

Metal leaf is most often used for decoration. Before the discovery of electroplating it was the only cost effective way to gild statues, rooftops or other objects. It is still used in some places, such as Atlanta's and Denver's Capitol building. Electroplating is the process of using Davd lloyd current to coat an electrically conductive object with a relatively thin layer of metal. ... To cover something in a thin layer of gold or a material that looks like gold. ...


Confection

In some culture Gold and silver leafs are considered non-toxic when labeled as food-grade and so can be used to decorate food (such as cake) or drink. They can be often found in a number of desserts including chocolates and Mithai. A recent trend has been the inclusion of floating bits of gold leaf in liquors such as Goldschläger. Cake decorating is one of the sugar arts that uses icing and other edible decorative elements to transform otherwise plain cakes into colorful and festive works of art. ... A variety of Indian sweets Indian sweets or Mithai, consist of many different kinds of milk, sugar and flour-based confectioneries originating from the Indian sub-continent. ... A bottle of Goldschläger Goldschläger is a Swiss cinnamon schnapps (43. ...


In Asian countries, gold is sometimes used in various foodstuffs. It was also used in coffee, especially during Japan's Bubble economy. An economic bubble occurs when speculation in a commodity causes the price to increase, thus producing more speculation. ...


See also

Decoupage (or découpage) is the art of decorating an object by gluing colored paper bits onto it in combination with special paint effects, gold leaf, etc. ... It has been suggested that this article or section be merged with Metal leaf. ... Schwabach is a German city of about 40,000 inhabitants near Nuremberg in the middle of the Franconia district of Bavaria. ... Vark (Hindi:वर्क) [Pronounced Vrk] is a silver foil garnishing on top of Indian sweets. ...

Notes

  1. ^ Holleman-Wiberg: Lehrbuch der anorganischen Chemie, Walter de Gruyter GmbH, 1985.

External links


  Results from FactBites:
 
Gold Leaf Technique for Jewellers (944 words)
Leaf metal varies from 1/8000 mm to 1/10,000 mm in thickness.
GOLD SIZE: Gold Leaf is attached to the metal or base material with an adhesive known as gold size.
The leaf is picked up with the brush by charging the brush with static electricity (traditionally by rubbing the brush on one's hair).
Hot rotary stamper apparatus and methods for metal leaf stamping - Patent 5115737 (3839 words)
The metal leaf is accelerated just before the raised die contacts the metal leaf and is decelerated just after the die design has been transferred to the substrate and the raised die has moved out of contact with the metal leaf.
In a preferred embodiment, the apparatus may include a microprocessor means for controlling the means for accelerating and decelerating to accelerate or decelerate the metal leaf and means for detecting of the position of the raised die relative to the location where the metal leaf in the design is transferred to the substrate.
Metal leaf 27 is fed off of a feed roller 1 at a velocity V.sub.3, which is preferably equal to the average velocity of metal leaf 27 at a point just upstream from the die roller and is related to velocity V.sub.1.
  More results at FactBites »


 

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