Bituminous varnish (black). It is a solution of petroleum pitches and natural or artificial resins in carbon solvents- or petroleum derivatives. Suitable for brush work, does not have lumps, dries at a temperature of 18-20 ° C within 12 at. a po 4 at. it's already dust-dry. It gives a medium shine. It is used on plaster or iron as a very protective layer in front, or on a base of very protective mini oil paint (what should be clearly stated in orders), as well as for anti-corrosion painting of steel structures indoors, instead of mini paint. Mixed asphalt varnish on a core. It is a dilution of clay and linseed oil, listed in kerosene and hydrocarbons. It is black in color with a gloss appropriate for, varnish paints. It has very protective properties. Suitable for work with a brush. The dried varnish coat should withstand a 180 ° bend around the diameter rod 5 mm. Complete drying occurs after 24 at. at a temperature of 18-20 ° C, dust free is achieved after, 12 at. It is used for painting plaster and in special cases, when it comes to obtaining an inert coating. As a protective coating it is used on iron for direct covering (without land) surfaces exposed to bending and shocks. Insulating black varnish, air drying. It is a dilution of hard asphalt, drying vegetable resins and oils (e.g.. linen and tung), properly siccative, with the addition of kerosene products- and carbon derivatives. It has a lump-free consistency, black colour, shine inherent in varnishes, suitable for brush work. Acid number at most 20. Liquidity inherent in varnishes, flexible and waterproof coatings. Water resistance test: po 24 at. soaking in distilled water at room temperature - barely noticeable dullness of the coating. It dries at 18-20 ° C, dust dry after 12 at, completely - after 24 at. It is used to coat or saturate coils, rotors and windings of electrical machines as electrical insulation.