Guidance for the process of Painting

The paints are coating of fluid materials and they are applied over the surfaces of timber and metals. The varnishes are transparent or nearly transparent solutions of resinous materials and they are applied over the painted surfaces. The distemper are applied over the plastered surfaces. The protective power granted by the application of paints, varnishes and distemper.

There are some important points that can help in painting process:-

  • Brushes:- It is necessary to have good brushes for painting. The brushes should be composed of bristles and not of horse hairs. The bristle brushes are elastic and possess good paint holding capacity. The bristles are split at ends in this respect, They can be distinguished from horse hairs.  It is preferable to use a round brush in painting. The brush should be soaked in water upto level of bristles for a period of about 1:30 hours and then they should be allowed to dry for a period of about 4 min. During painting, the brushed should be immersed in paint upto about one-third length of the bristle and the excess paint in the brush is removed by gently pressing the bristles against the inside surface of the paint pot.

  • paints:- The ready mixed paints of different make and various brand are available in the market. They are available in different tints and can be applied in the same form as received. If the ready mixed paint is kept exposed to the air for a long duration, The solidification of the base and pigment occurs.
          The procedure for preparing paint from stiff paint is as follows:
  1. The sufficient stiff paint is taken in a pot, The remaining stiff paint is to be covered or left with a layer of linseed oil.
  2. The linseed oil which may either be raw or boiled or pale is then mixed with stiff paint by stick.
  3. The other ingredients of paints are then added.
  4. If a colour is required, suitable pigment is added and thoroughly mixed.
  5. A second pot is taken and it is covered with a canvas which is tied tightly.
  6. The mixed paint is then allowed to pass through the canvas of second pot. The brushes may be used for this purpose.
  7. The paint is then ready for use. The mixed paint may be prevented from drying by maintaining a thin film of linseed oil or of water at top.
  • Knotting:- The term knotting is used to indicate the covering or killing of all knots in woodwork with a substance through which the resin cannot exude or come out.
          Mainly there are three methods of knotting:-
  1. Size knotting:- This is applied in two coats. For the first coat, the red lead ground in water and mixed with strong glue size is used in hot condition. This coat dries in about ten min and then second coat consists red lead ground in oil and it is thinned by boiled oil and turpentine.
  2. Patent knotting:- This is applied in two coats. For both coats, the varnish prepared by dissolving shellac in methylated spirits of wine is used.
  3. Lime knotting:- The knot is covered by hot lime and is left for a full day, the surface is then scrapped off and then ordinary knotting is carried out.
  • Stopping:- The term stopping is used to indicate the rubbing down of the surface after the first coat of paint is applied. The rubbing is done by means of pumice-stone or glass-paper or both. The rubbing is commenced, the holes. cracks, etc. The hard stopping is used when instead of ordinary putty, an admixture f one-third white lead and two third ordinary putty, is filled in holes, crack, etc. 
  • Coats:- The coats is  usually applied in three or four coats. The first coat is known as the priming coat, The second one as under coat and the remaining coats is known as finishing coats.
  • Spray painting:- Instead of ordinary brushes, a spraying gun may be used for painting work. The gun work under compressed air and the paint thrown through the gun on the surface forms a thin uniform layer of paint on the surface. 

  • spraying painting is better than brushes because it is fast and speed of works increase considerably, An experienced painter can create artistic pattern or design on the surface by spraying paints of different shades. The main advantage is that, the mechanical equipment is such that the paint remains always in a state of motion. this ensure uniform mixing of ingredients of the paint.
Guidance for the process of Painting Guidance for the process of Painting Reviewed by Wikihub on March 06, 2019 Rating: 5

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