Types of Paints and Painting System

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What are the three stages in a painting system?

Primer, Undercoat, Finishing coat

What is the main function of the primer in a painting system?

To grip the substrate, provide protection against corrosion/dampness, and provide a good key for remaining coats

What is the purpose of the undercoat in a painting system?

To provide good opacity (hiding power) and a smooth surface, and to contain large quantities of pigment for hiding power

What is the primary function of the finishing coat in a painting system?

To provide a durable layer of the required color and texture Signup and view all the answers

What are the main components of paint?

Vehicle or binder, Pigment, Extender Signup and view all the answers

What is the primary constituent responsible for the gloss and mechanical properties of the final coating?

Vehicle Signup and view all the answers

What are the advantages of using emulsion paints for interior decorating?

Brushes can be washed out in water, suitable for new cement or plaster Signup and view all the answers

What is the purpose of adding plasticizers to cellulose paint?

To give elasticity Signup and view all the answers

Why are solvents often flammable in paints?

They need to be volatile Signup and view all the answers

Why do primer and undercoats have large proportions of pigments?

To produce opacity Signup and view all the answers

What are the properties of bricks?

The properties of bricks include strength, durability, fire resistance, and thermal insulation. Signup and view all the answers

Explain the manufacturing process of clay bricks.

Clay bricks are made by pressing clay into a mold, extracting it into a formed unit, and then heating it to sinter the clay. Signup and view all the answers

What are the harmful ingredients to bricks and their chemical compositions?

The harmful ingredients to bricks include lime, iron, and alkalies. Their chemical compositions can negatively impact the quality and durability of the bricks. Signup and view all the answers

Describe the different types of bricks and their uses.

There are various types of bricks, including common bricks, facing bricks, and specially shaped clay bricks. They are used for different purposes in construction, such as load-bearing, decorative, and specialized applications. Signup and view all the answers

What is the definition of a brick?

A brick is a building unit that is easily handled with one hand and has a standard metric size of 215 x 102.5 x 65 mm. Signup and view all the answers

What is the purpose of lime and oxides in clay bricks?

Helping grains of sand to melt and bind clay particles together + impart red color Signup and view all the answers

How does excessive lime affect the color of clay bricks?

It would give out a dark blue color Signup and view all the answers

What are the harmful effects of pebbles of stones and gravel in clay bricks?

Weak, porous brick; cracks; inability to be readily cut or worked Signup and view all the answers

How does alkaline-salts affect the appearance of clay bricks in damp conditions?

They absorb moisture from the atmosphere, resulting in a greyish white deposit (efflorescence) that spoils the building appearance Signup and view all the answers