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Ali Hamza
Ali Hamza
Mechanical
20 Jan 2019

What is White Wash and its Applications??

White Wash:

After it the surface is cleaned and the white wash is applied with jute brushes. A white wash when mixed with colouring pigment such as yellow earth is called colour wash.

Preparation of surface:

Surface to be white washed should be clean, smooth and dry. In case of re-white washing, the surface should be thoroughly cleaned and cleared of all foreign matter. Loose white wash should be scrapped. All holes, depressions etc should be made fair and smooth by removing the scratch-able material and applying repairs before application of white wash. Nail holes and patches caused by the removal of old white wash scales should be made good with lime putty. Greasy and smoky spots should be cleaned. All new patches should be given an extra coat of white wash after they have dried before commencing regular white wash.

Applications :

The wash will be laid on the surface with a moonjbrush made quite soft. A vertical stroke followed by a horizontal stroke shall constitute one coat. Each coat must be allowed to dry before the next one is applied. On new surfaces or where scrapping has been done, three coats of white wash would normally suffice. One coat of white wash would suffice on a surface having the old wash in good condition. If the colour wash is to be replaced by white wash, then the old colour wash must be scrapped and three coats of white wash be applied. 

A properly applied white wash should, when complete, form an opaque white coat with a smooth and regular surface through which the plaster or the old work does not show. It should present uniform white colour and should not readily come off on the hand when rubbed.