Paint Works Flashcards
it is considered incomplete unless it is given finishing coat
civil engineering construction
the best designed residential building will be considered unfinished if its properly plastered walls are not covered with a coat of what?
proper distemper in the interior and snowchem on the exterior
it gives aesthetic appeal to the construction on the other hand and also protect the material against deteriorating agents thereby increasing their life
paint and varnishes
it is essentially a coating or covering material applied on a metallic surface
paint
paint is defined as “dispersion of pigment in a suitable drying oil in the presence of a solvent called what?
thinner or diluent
3 essential ingredients of paint
- pigment
- solvent
- drier
it is the real colouring substance
pigment
in which pigment is dissolved
solvent
other surface finishes which differ from paint
- varnish
- lacquer
- enamel
which is necessary to quicken process of evaporation
drier
it contains no pigment, instead it has a resinous substance dissolved in suitable oil or liquid
varnish
it is a finishing material which is dispersion of resin and cellulose esters are in a volatile solvent. It dries quickly by evaporation of solvents
lacquer
Function of paint: Paint are applied on a surface for following reasons:
- to protect material behind it from deterioration
- developing a decorative effect
- to facilitate cleaning process
Major paint companies
- Asian paint
- nerolac
- berger
- ICI
it is a blend of a paint with a varnish giving a finish that is strong, durable and brilliant at the same time
enamel
other suitable characteristics of paint
- it should dry quickly
- it should form a tough, elastic and durable coating when dry
- it should resist corrosion
- it’s surface should be glossy and washable
- it should have necessary consistency
- it should be easy to clean
characteristics of a good paint
- good hiding power
- permanent colour
- resistance to atmospheric condition
- easy application
- economical in cost
types of paint
- oil
- enamel
- lacquers
- emulsion
- synthetic
- aluminium
- cement
- distemper
these are common paints quite useful for ordinary use in metal and wood products on large scale.
oil paint
it generally has a low order shine. It is however quite opaque. It contains an unsaturated oil like linseed oil and their hardening is because of oxidation due to exposure to atmosphere
oil paint
they are usually available as ready made paints and consist mainly of white lead or zinc white, petroleum resinous matter, and a oil.
enamel paint
it forms a hard, impervious enamel like surface on drying. This group contains the most commonly used paints, for exterior and interior works in building construction. It is available in all colors and shades.
enamel paint
it improve the adhesion of the film to the surface
resin
if a pigment is used in the paint then it is called as?
cellulose pigment
it is often added to lacquers as a plasticizer
coaster
defined as a suspension of one liquid within another liquid
emulsion paint
in emulsion paint, one of the liquid is a ?
paint source
it forms a group themselves that has been used extensively for manufacturing of high quality paints.
synthetic paint resins
it posses very good hiding power. They are highly reflective and impart a good appearance to the surface
aluminium paints
these pigments also contain varying proportion of hydrated lime, hygroscopic salts, and water repellent additives like aluminum stearates
cement paints
it is cheap, durable and can be made highly decorative by using selected pigments.
cement paints
these are finishing coat used only on the interior walls in the building construction. They consist mainly of whiting and glue size in water.
distempers
are used in building in place of ordinary whitewash. These provide a more durable, smooth, and pleasing finish.
distempers
application of paint procedure on wood
- cleaning
- knotting
