Paint Chalking

What Is Chalking Paint | 10 Causes of Paint Surface Chalking | How to Fix The Chalking Paint Problem | How to Reduce Paint Surface Chalking

What Is Chalking Paint?

Chalking Paint means, the formation of fine powder on a painted surface; it occurs due to weathering action which can cause colour fading. Although some extended chalking is normal, excessive chalking is a bad sign.

What Is Chalking Paint | Causes of Paint Surface Chalking | How to Fix The Chalking Paint Problem | How to Reduce Paint Surface Chalking
Chalking Paint

Chalking consists high level of titanium dioxide and extenders. An initially chalking paint is visible in white and off-white patches and excessive chalking is indicated a certain amount of mould and dirt on the paint surface.

Generally Chalking is caused by exposure to ultraviolet and other forms of radiation or nuclear radiation.

Causes of Paint Surface Chalking

  • Using thinned consistency of paint.
  • Using cheap quality paint.
  • When the paint is overspreading at that time chalking problem is occurs,
  • Not proper sealing and priming of the porous paint surface.
  • Applying paint on the dirty surface.
  • Long term exposure to ultraviolet and moisture.
  • Coastal Environments, with salty moist air.
  • Using interior type paint for exterior surface or application.
  • Using high pigmented paint.
  • Applying fresh paint directly on the old paint surface.
  • Chalking can occur when not applying a proper layer of topcoat.

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How to Identify Paint Chalking Problem

The following signs indicate the excessive amount of chalking is to be done,

  • Lighten up the original color of the paint.
  • When clearly visible white and off white type of patches on the existing surface of the paint.
  • When erode or blistering the film of paint.
  • To deface the appearance of the actual paint surface.
  • Easily visible mold on the paint surface.
  • When clearly visible white and off white type of patches on the existing surface of the paint.

How to Fix The Chalking Paint Problem

The following steps are used for fixing the chalking paint problem,

What Is Chalking Paint | Causes of Paint Surface Chalking | How to Fix The Chalking Paint Problem | How to Reduce Paint Surface Chalking
Fix The Chalking Paint Problem
  • Initially, to determine the degree of chalking paint by rubbing the paint surface with a dark cloth and finger.
  • For removing all residue of chalk paint by using these methods,
  • Excessive chalking paint is removed by using sandblasting or pressure washing.
  • In that case pressure washer is unavailable, at that time scrubbing the paint surface using a stiff type brush with mild detergent.
  • Rinse out this surface with strong steam water.
  • Moderately to light surface of chalking paint may use a sanding or wire brushing.
  • For removing the excess surface of chalk powder.
  • Then spray the steam strong water by using the garden hose and allow the paint surface to dry.
  • To check the surface again your finger and rag for determining the amount of residue chalk.
  • If no or little amount of paint chalk remains and old paint is in good condition then priming is not required.
  • In that case light to moderate paint remains on the surface, then apply a penetrating additive to the first layer of water-based paint.
  • It helps to stick on the paint film and also it gives an acrylic finish.
  • An acrylic paint is much better than vinyl acrylic paint because it has good resistance properties of chalk.
  • In special cases, if clearly, visible chalk is still present then apply alkyl-based primer as a primer coat of paint.
  • To finish the surface using a high-quality topcoat paint.

Read More: What Is Aluminium Paint? | Advantages and Disadvantages of Aluminium Paint


How to Reduce Paint Surface Chalking

The following these steps you can ensure that your new paint surface will have fewer chalking issues.

  • To choose good quality paint
  • Firstly you should apply good quality primer to well cleaned surface.
  • Not very thin layer of paint is used for external surface.
  • You should select lighter color which is less ultra violet absorbent.
  • Applying inorganic pigmented color that is not reacting strongly against to ultra violet rays.
  • For washing and cleaning regularly the external paint will greatly reduce the chalking effect offpaint.
  • When a new painting surface is suffering from the chalking effect then before applying new paint, surface rise out with the trisodium phosphate and clean water.
  • Lastly, repaint the surface when washed surface is completely dry.

Read More: Types of Paint Brushes and Their Uses

FAQs:


What Is chalking Paint?

Chalking means, the formation of fine powder on a painted surface; it occurs due to weathering action which can cause color fading.

What are the causes of Paint chalking?

  • Using thinned consistency of paint. Using cheap quality paint.
  • When the paint is overspreading at that time chalking problem is occurs, Not proper sealing and priming of the porous paint surface.
  • Applying paint on the dirty surface.
  • Long-term exposure to ultraviolet and moisture.
  • Coastal Environments, with salty moist air.
  • Using interior type paint for exterior surface or application.
  • Using high pigmented paint.
  • Applying fresh paint directly on the old paint surface.
  • Chalking can occur when not applying a proper layer of topcoat.
  • How to Reduce the effect of Paint Surface Chalking?

  • To choose good quality paintFirstly you should apply good quality primer to well cleaned surface.
  • Not very thin layer of paint is used for external surface.You should select a
  • lighter colour

  • which is less ultra violet absorbent.
  • Applying inorganic pigmented color that is not reacting strongly against to ultra violet rays.
  • For washing and cleaning regularly the external paint will greatly reduce the chalking effect offpaint.
  • When a new painting surface is suffering from the chalking effect then before applying new paint, surface rise out with the trisodium phosphate and clean water.
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