Zinc white: application, characteristics, painting methods

Zinc white is an inorganic pigment based on zinc oxide, which in combination with various binders (drying oil, vegetable oils) form white dyes. Few people know about the characteristics and characteristics of zinc white, so this article will go about this substance.

Characteristics

In its pure form, the product has absolute whiteness with a light bluish tinge. White has no odor, and can also be mixed well with an aqueous solution of alkali and ammonia. They are not destroyed and do not deform under the influence of microorganisms and bacteria. Since they are capable of absorbing moisture, they should only be stored in closed containers.

Positive properties also include such indicators as:

• Low toxicity;
• Resistance to sunlight;
• Ease of application;
• Compatibility with all types of paints;
• Resistance to weathering.

Nevertheless, they also have negative properties, which include cracking, poor hiding power and the ability to absorb a large amount of oil.

When used in painting, such properties are white, as brittleness and the ability to become covered with cracks, lead to the fact that the pictures written with their application can not be folded. And you also need to monitor the tension of the canvas, which changes with increasing humidity. When it is squeezed or stretched, the white may crumble.

Types of zinc white

White zinc is divided into two brands: BC0 and BC1.

The product, belonging to the brand BC0, is used for making paints, artificial leather and rubber products. It is also added to abrasive materials and cement formulations for dentistry.

White grade BC1 is mainly used for the manufacture of asbestos-cement and paint and varnish materials, which are used for interior and exterior decoration of premises, less often for the production of artificial leather and plantar rubber.

Application

In addition, there are other areas where zinc white is used. Their use takes place in medicine. They are one of the components of some antiseptic ointments and powders. They are also used for the manufacture of plastics, rubber, paper and glass.

Separately, it is possible to distinguish white zinc (white paint), made on the basis of zinc oxide of grade A. This paint is divided into several types intended for external and internal works. Among this type of paints , zinc white MA 22, which are characterized by high characteristics and increased fire safety, are most often used for interior finishing of premises.

In addition, today, building anticorrosion paints are made from zinc white. White is added to the formulations of putties and various adhesive compositions, and also used in the production of ceramics.

It should be noted that when repairing zinc white, diluted with linseed oil prior to the paint consistency, it is possible to impregnate linen strands that are used as seals in threaded joints of water supply pipes.

For painting works, pure zinc white is produced, consisting of very small particles of zinc oxide, which do not contain impurities of iron oxide and lead. They are translucent, they are distinguished by a cool tone and, when applied, form an inelastic film. They are used in all types of painting, because they are very resistant to light pigment, which is not subject to change even in those paints that contain sulfur. They usually bleach vermilion, and also add to cadmium to improve its quality.

Oily zinc white

Such a product is zinc white, which are wiped with linseed oil or vegetable oil. They are often called oil paints and are used to protect metal structures from corrosion, as well as for painting wooden and plastered surfaces. And they are suitable for outdoor and indoor work.

Zinc white oil has good hiding power, that is, when applied to the surface, they completely hide the color of the previously applied coating. In addition, after application, they create a stable anticorrosive coating with high moisture resistance and vapor tightness.

Painting method

Zinc white is used for coating plaster, metal and wood surfaces.

Work is done by putting on rubber gloves, but during and after the completion of the room must necessarily be ventilated.

Before you start painting, white, if it is a thickened powder, should be diluted with natural linseed oil, the percentage of which should be 18-25% of the total weight of white, and mix very carefully. If it's oil paint, then if necessary, add white spirit or turpentine to it.

The surface should be prepared in advance:

• First it is cleaned of dirt, grease, dust and old paint (if required). This is done with a spatula;
• Then putty is smeared with cracks and cracks;
• After it has dried, the working surface is ground using sandpaper;
• Then apply a primer;
• After drying, the primers pass to the color.

To reduce the consumption of white, it is recommended to cover the surface with linseed oil.

Apply the white to a dry smooth surface with a paintbrush , paint sprayer or roller:

• Brush is used for painting small elements and small surfaces;
• For a large area of the coating a brush or roller is used;
• More effectively, the painting process is carried out with a paint sprayer. This method makes it possible to create an even layer and process hard-to-reach places.

The number of layers can be 1 or 2, depending on the desired result. Each layer usually dries a day, if the room temperature is not below +20 ° C. The consumption of whitewash on one layer is approximately 170-200 g per 1 sq. Km. M.

Packaging

Various options are used for packaging. Zinc white can be packaged in bags (polyethylene or paper), polyethylene or wooden drums, cardboard-poured or plywood containers with polyethylene liner, paper or polyethylene bags, and also in special soft disposable containers.

Transportation and storage

Transportation of the product is allowed by all types of covered transport, except for white, packed in special soft containers - they can be transported in open type vehicles, and stored on open areas.

As for zinc white, packaged in other packages, they are to be stored only in closed warehouses, with temperatures ranging from -40 ºС to +40 ºС. They are stacked on wooden pallets stacked up to 3 m high.

Shelf life - 1 year.