Bright copper: properties and features

Everyone knows that copper has a red-metallic color with a noble radiance. But the common color of the Yard-Copper is not painted in shades of red. It was widely used several centuries ago in icon painting, for dyeing fabrics and household utensils, for a variety of decorative works. It has not lost its value even today, although the manufacturing technology has undergone many changes. In this article we will consider in detail what kind of paint is this, what is its history and its modern industrial significance.

What is the copper-core?

The paint is produced by complex chemical processes. In the language of science, this complex inorganic compound is called a copper salt of acetic acid. The crystals of this substance have a saturated blue-green color. They are used for the manufacture of paint.

Grades and colors of the Iberian-Copper

The green color of the Yard-Copper is the most common. It can have different shades, from cold grassy to warm golden-green, like the wings of a summer bug. In some sources, it is called the English jar, because once they produced such a paint in England. Today, production is established in many countries, including Russia. This is obtained as a result of exposure to copper acetic acid wood.

There is another variety - blue honey-colored, which is often called French, but unlike the first grade, it really is mainly made in Montpellier (France). To obtain such a yarite, copper is exposed to prolonged impacts of fermented grape scraps.

Properties

The paint, prepared on the basis of yar-copper, is considered quite stable and opaque. Before application, the surface must be scraped and degreased, so that the ash lay flat. Apply paint more thin layers. The drying time of the paint layers is medium.

Artists sometimes use the paint also as an adhesive, on the fresh layer the non-coarse decorative elements adhere reliably and firmly.

Historical background: How to cook the Yard-Copper in Russia

It is noteworthy that people have learned to make such a paint not so long ago. It was well known that the Yard-Copper in Russia, where it was brought, most likely, from Byzantium. Copper easily reacts not only with laboratory reagents, but also with much more accessible agents. Once people noticed that this metal can change color even from contact with the skin. Perhaps this was the beginning of experiments with copper. None of the laboratory tests in the old days and there was no speech, but organic acids are many in berries, fruits, vegetables, parts of plants.

Today it is known, from what did the yare-copper in Russia. For this, copper plates or shavings were used, as well as peas soaked in water. The mixture was insisted in a warm place for about two weeks. During this time, the products of fermentation of starch contained in pea reacted with copper, resulting in the production of the necessary substance, which is blue or green.

On the basis of the obtained substance, paints were made, which were used for painting linen, cotton and woolen fabrics, yarn, objects of everyday life, buildings and structures, and in later times even when writing books. The icon painters, artists, illustrators also applied the yaras.

Production and application in the modern world

The process of making pigment differs from the old, but it is based on the same steeping of copper with the reagent. Modern manufacturers use large vats, in which thin copper plates and moistened with wood acetic acid or grape vyshimka woolen flaps are laid layer by layer. As soon as the pigmented plaque (yar) begins to form on the metal sheets, gaps are established between the copper and the cloth to ensure air access. The procedure for the subsequent expansion of the yari layer lasts 1.5-2 months. During this time, each sheet overgrown with a layer a few centimeters thick. The yar is relatively easily separated from the metal substrate, and then converted into a dough by means of special reagents and water. It is defended in the sun to grind and prepare for further use as a pigment.

According to the modern classification, calling the resulting mineral paint, as it usually is, is not entirely correct, because in its composition is present and organic. But such a definition is quite common and familiar even to those who know well how to get copper copper-copper.

The described method is the most common, but not the only one. To obtain a pigment, other more sophisticated technologies are sometimes used.

Today Yary-Medyanka is used in the same areas as before. On its basis, various paints are prepared, intended for staining synthetic and natural surfaces and fibers.