Mastic varnish for oil paintings. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Mastic varnish for oil paintings. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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To prepare mastic varnish for oil paintings, dissolve 6 parts of sandarac, 2 parts of mastic, 1 part of Copay balsam, 1,5 parts of Venetian turpentine, 1 part of French turpentine, 20 parts of alcohol (96%).

Author: Korolev V.A.

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Different types of trees affect the climate in different ways. 12.02.2016

Increasing the area of planted forests will not slow down global warming - the type of trees, their ability to absorb carbon dioxide and the impact on local air temperature are of great importance. Two research groups came to these conclusions. The reports of scientists from France and Germany and from Italy are published in the journal Science.

According to the data given in the article of the first group, from 1750 to 1850, approximately 190 thousand square kilometers of forests were cut down in Europe - for fuel and to clear the land for agriculture. Since then, forests have been reforested over twice the area, but conifers have been planted instead of deciduous trees in large areas, as this is more beneficial to logging interests. And it turned out that today the forests of Europe hold about 3,1 billion tons less carbon than in 1750.

Also, the modeling done by the researchers showed that the air temperature also changes - by about 0,12 degrees Celsius due to the better ability of conifers to absorb and retain heat. The model suggests that a preference for dark conifers, which absorb more sunlight and release less water, contributed to local warming.

The authors of the second study concluded that forests in all types of climates cool the air, especially during the summer months. The study used satellite data to reconstruct changes in air temperature in areas that were cleared of forest from 2003 to 2012.

Scientists believe that national authorities should take into account local features and the biophysical impact of forests on the atmosphere, instead of focusing solely on the global effects of carbon dioxide emissions.

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