What is the function of turpentine What is turpentine?

The role of turpentine:

Turpentine is one of the oils used to dilute oil painting pigments, its components are extracted from pine, volatile, dissolvable oil paint pigments, with the best quality of medicinal turpentine, when oil painters paint the outline and begin to lay the base color, a large number of turpentine pigments are commonly used, it is an indispensable material for modern painters to paint.

Turpentine can be used in the manufacture of synthetic camphor, synthetic mint tablets, terpineol and synthetic fragrances. It is also widely used in the paint industry, pesticide industry, paper industry and textile industry.

Oil, generally with turpentine and toning oil, after the painting is dry, use varnish, this is a protective process after production, can not be discussed. Let's talk about turpentine first. Turpentine, commonly used by domestic oil painters, is a volatile medical oil.

In the modulation of oil painting, it plays the role of diluting pigments. It will completely volatilize in a minute or two, and it will be dull when it dries. So, if you want to do a matte effect, you can use turpentine to paint the whole way.

In addition, because it is completely volatilized and has no residue after drying, it is suitable for thin painting, which can make the color completely fit the cloth surface. However, when the oil dries, the color will lose its brightness and become slightly grayish. In this way, we come to the toning oil.

Toning oil is a commonly used oil, volatilization is slow, often takes a day or two to dry, if it dries, it takes more than a week. However, after the oil dries, the brightness and freshness of the color will not change significantly, and the picture will appear moist and shiny. After the oil dries, there will be residue and thickness, which is more difficult to grasp than turpentine.

It is better to form it at one time, otherwise it can only be modified after the oil is dry, and the time is too long, and the feeling of the picture has changed. Therefore, turpentine and toning oil can also be mixed according to a certain proportion, which dries faster and the color is brighter.

Turpentine is an essential oil. Colorless to dark brown liquid, with a peculiar odor, consisting of a mixture of hydrocarbons, containing a large amount of pinene (about 64% -pinene and 33% -pinene). According to the different raw materials and preparation methods, it is divided into (1) pine resin turpentine, (2) extraction of turpentine, and (3) dry distillation of turpentine.

When stored or exposed to the air for a long time, the smell gradually increases, and the color gradually turns yellow; It is flammable and produces thick smoke when burning. It is soluble in ethanol, can be mixed with chloroform, ether or glacial acetic acid at will, and is soluble in water.

Turpentine is an organic solvent that is mainly used to dissolve paints and is often used when painting. Thanks.

Brush washing, and when painting on oil painting, it dries quickly, and generally paints like to use this, and if you take the exam, it is to do it quickly.

The main ingredient of turpentine is pinene, which has special chemical properties and is an excellent solvent, and is an important raw material for coatings, synthetic camphor, synthetic resins, and other organic synthesis industries.

Washing the pen, a bit like painting gouache water.

Turpentine is a type of essential oil, and it is an important industrial raw material.

Turpentine is a liquid extracted from the resin of the coniferous plant by distillation or other methods, and the main component is terpenes. Turpentine can be mixed with chloroform, ether or acetic acid in any proportion, but is insoluble in water. Turpentine is a flammable liquid with a high flash point, which is volatile and produces a large amount of smoke when burned.

Turpentine is widely used as a chemical raw material, and has the opportunity to come into contact with turpentine in industries such as art glass, paint, camphor manufacturing, pharmaceutical, and rosin production.

Harvesting and Storage:

There are ascending (i.e., V-shaped method), descending (i.e., Y-shaped method), grease collection method and chemical treatment method for collecting resin. In China, the descending lipid collection method is mainly adopted. Pine trees with a diameter of 20-50 cm first.

Make a cut at the trunk of a tree 2 m above the ground. Before cutting the cut, the rough skin should be scraped off, but not to damage the xylem, the scraping surface length is 50-60cm, and the width is 25-40cm.

Cut 35-50cm long and wide on the scraping surface, penetrate deep into the middle groove of the xylem, install a fat collector at the base of the middle groove, and then cut another pair of side grooves from the middle groove, and the oleoresin can be continuously collected. It is advisable to harvest at 30-35, that is, from May to October in the south of the Yangtze River, and from June to September in North China and Northeast China.

First, the use is different.

1. Pine oil: It can be used as washing solvent, dyeing solvent, coating solvent, paint solvent, antifoaming agent, alcohol denaturant and wetting agent.

2. Turpentine: Turpentine is widely used as a chemical raw material, and has the opportunity to come into contact with turpentine in art glass, paint, camphor manufacturing, pharmaceutical, rosin production and other industries.

Second, the way of generation is different.

1. Pine oil: It is the oil secreted by the pine plant, which is carved into a "V" shaped mouth on the trunk of the adult pine tree with a knife, and the "V" wound secretes pine resin. Pine resin is refined to become pine oil.

2. Turpentine: The natural oleoresin (resin turpentine) is a yellowish opaque block, and its distillate is turpentine.

Third, the nature is different.

1. Pine oil: strong emulsification, good wettability, permeability and leveling.

2. Turpentine: colorless volatile liquid with special odor.

Pine oil is a liquid left out of the pine tree, also known as rosin, turpentine is a kind of dispersion oil extracted, generally used for dilution, drying speed is very fast, is a volatile liquid