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Paint fading is a common type of defect in painting work that causes the discolouration of the applied paint.
The main causes of such defects are the various atmospheric factors such as rain, sunlight, moisture infiltration etc.
Precisely, fading may be defined as the loss of one or more colour pigments from the film of paint.
Over time, the film of paint starts to lose the colour pigments under harsh atmospheric conditions and continuous sun exposure.
fig: Fading
1. Causes of Paint Fading
The main causes of paint fading are:
1. Sunlight, Infrared and Ultraviolet Radiation
2. Temperature Variations
3. Application of dark colour paints (darker colours tend to absorb more radiations from the sunlight)
4. Coastal and Harsh Environmental Conditions
5. Inadequate Film Thickness
6. Use of inferior quality paints
2. Repair & Prevention of Paint Fading
Once fading of the paint coat begins, it cannot be repaired completely but for preventing further de-colouration, weathering resistant pigments may be used.
Some of the precautions that can be taken to prevent fading are:
1. Use of certified UV resistant paints from authorized manufacturers.
2. Selection of lighter coloured paints.
3. Regular maintenance and supervision.
Read Also: 8 Types of Defects in Painting
