Drying oil cooking. simple recipes

Free technical library

FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
Free library / Directory / Factory technology at home - simple recipes

Drying oil cooking. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

Comments on the article

Varnish are drying vegetable oils prepared in an appropriate way. For their manufacture, mainly linseed oil is used, since it has the ability to dry quickly and gives a high-quality drying oil. Poppy oil, hemp nut oil, etc. are also used. Due to the high cost and lack of vegetable oils, the latter are partially replaced with mineral oils or resin oils, but such drying oils are naturally inferior in quality to natural oils.

The purpose of the preparation of drying oils is to increase the drying capacity of the oil.

It has long been noted that when oils are heated, the addition of special substances called desiccants, as well as when heated oil is blown with air, its drying ability is greatly increased.

There are two ways to prepare drying oils: hot and cold. The hot method consists in heating the oil at a temperature of 200 to 280 ° C with the addition of various metal oxides. With the cold method, work is carried out at lower temperatures - from 120 to 150 ° C.

Drying oil is boiled in an isolated fireproof room, as if handled carelessly, it can ignite and cause a fire. It must also be borne in mind that rags soaked in drying oil can easily ignite spontaneously.

For cooking drying oil, a boiler made of sheet iron is very convenient. The top of the cauldron is surrounded by an iron ring to which a chain is attached, allowing a worker to quickly lift the cauldron out of the fire. In the room above the boiler, draft is arranged to remove harmful vapors generated during the cooking of drying oil. For convenience, the boiler is equipped with a special device that allows you to mix the mass during cooking. You can also use simple boilers built into the stove.

Oil before cooking must be cleaned of impurities by prolonged settling. The boiler is filled with oil to 3/5 of its volume. Initially, when heated, the oil releases water vapor: at 110-120 ° C, complete evaporation of water occurs. The yellow coloring matter burns out at 150 °C, and on further heating the oil takes on a light color. When using fresh oils, foam already forms at 80 °C. In this case, the temperature should be raised very slowly so that the water gradually evaporates and the foam disappears.

Usually at a temperature of 170-175 ° C, the foam decreases. If the foam does not disappear at this temperature, then the oil is heated at the same temperature until the foam disappears. To get a light priceless oil, you have to heat the oil for about 3-5 hours. At approximately 170 °C, the heating is interrupted and the desiccant is added in small portions to the oil.

Since the oil foams strongly with each addition, the work should be carried out very carefully. Next, the oil is heated for some more time, and then cooled. Heating with desiccants is carried out to a relatively high temperature: 230-260 ° C. Thermometers are used to determine this temperature, but since such thermometers are expensive, some practitioners use a goose quill and do this: dip the quill in oil and see if it begins to curl up its beards. These contractions can be used to judge the temperature of the oil, since the contraction of the barbs lies between 250 and 270 °C.

To tame the foam, it is recommended to pour in a part of the finished cold drying oil, which should be at hand (crude oil cannot be added in any way). A good drying oil is obtained by blowing hot oil with air, but this method is complicated and difficult for a handicraftsman.

The fastest drying gives the addition of a mixture of manganese oxide, zinc and calcium. Drying oil prepared with such a mixture dries out after 9 hours. Drying oils prepared on lead preparations darken from the action of hydrogen sulfide. Good linen drying oil should dry within 10-12 hours, and some varieties within 6 or 8 hours.

Author: Korolev V.A.

We recommend interesting articles Section Factory technology at home - simple recipes:

▪ Cement for attaching knives and forks to handles

▪ Medical soaps

▪ Masses for crafts

See other articles Section Factory technology at home - simple recipes.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Single-chip batch processor for signal conversion 27.03.2003

ZARLINK SEMICONDUCTOR announced the release of a single-chip packet processor for converting TDM signals to Metro Ethernet signals.

This processor will allow you to transfer large amounts of data over Ethernet networks. It can operate 32 T1/E1 lines simultaneously or 1024 TDM circuits. The processor is very flexible, it allows each T1/E1 channel to work with its own timing.

Other interesting news:

▪ Cause of the ice age found

▪ Headphones Sony XB900N

▪ Converting hydrogen to metal

▪ 72-core desktop processor

▪ Internet machine

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Radio - for beginners. Article selection

▪ article Between the hammer and the anvil. Popular expression

▪ article What is suede? Detailed answer

▪ article Bicolor sorghum. Legends, cultivation, methods of application

▪ article Universal Parallel Adapter. Encyclopedia of radio electronics and electrical engineering

▪ article Stabilized adjustable power supply with overload protection. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews