Sofia Martinez
Plastic emulsion paint is a water-based paint that is easy to apply and maintain. It is a popular choice for interior walls due to its affordability, durability, and washability. It is also simple to clean up after use, and its low odour makes it pleasant to work with. Before applying plastic emulsion paint, ensure the surface is clean, dry, and free from dust. Old paint should be removed with sandpaper or a paint remover, and any unevenness should be levelled with putty. When painting, work towards the source of light, and apply uniform brush strokes or use a roller for a smooth finish. Allow each coat to dry before applying the next one, and you'll be left with a magnificent, matte finish.
Characteristics and Values of Applying Plastic Emulsion Paint
| Characteristics | Values |
|---|---|
| Surface Preparation | Clean the surface with sandpaper, removing dust, old paint, and any unevenness. Fill holes and uneven surfaces with putty. |
| Priming | Apply a cement primer as a base coat for better adhesion and to ensure the paint doesn't peel away. |
| Paint Application | Use a brush, roller, or spray to apply the paint. Ensure uniform brush strokes. Allow each coat to dry before applying the next. 2-3 coats are usually sufficient. |
| Drying | The paint dries by evaporation of water content. It typically takes around two hours to dry, depending on viscosity. |
| Finish | Plastic emulsion paint provides a smooth, matte finish to the walls. It is washable and easy to maintain. |
| Dilution | Emulsion paint can be diluted with water (about 10%) for creating paint effects like sponging, stippling, and stencilling. |
| Surface Suitability | Suitable for interior walls, ceilings, brick, plaster, concrete, and metal surfaces. Not recommended for external surfaces, wood, or iron. |
| Advantages | Affordable, durable, easy to apply and clean, quick-drying, low odour, and versatile with various colours available. |
| Disadvantages | May require multiple coats for full coverage, depending on the type of emulsion. |
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Preparing the surface
Firstly, ensure the surface is clean and free from dust. Use warm water and a mild detergent to scrub the wall, removing any oils, mortar dropping, splashes of cement slurry, dust, or grease spots. Rinse with clean water and let the surface dry completely. It is very important that the wall is dry before you start painting, as emulsion is a water-based paint, and applying it to a damp surface can prevent it from adhering correctly.
Next, consider sanding the wall with sandpaper to help the paint adhere more effectively. This step is especially important if the current wall surface is glossy or smooth. Wrap sandpaper around a cork block and gradually work over the entire surface of the wall. Sweep away any dust from the wall with a bristle brush. If there is old paint on the surface, rub it down with sandpaper or remove it with a patent paint remover if the paint is blistered.
To create a smooth and even surface, fill in any holes or uneven patches with putty. Putty can be made by combining varnish and white lead chalk "MITTI" to form a thick paste. Allow the surface to dry for at least 48 hours.
Finally, apply a base coat or primer to the wall. A base coat can be made by combining one part white emulsion with three parts water. Alternatively, you can make your own primer by diluting emulsion paint with water. Using the same paint for the primer and topcoat ensures a streak-free finish.
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Priming
Clean the Surface:
Start by thoroughly cleaning the surface you plan to paint. Use sandpaper to remove any old, unstable paint. Always wear a protective mask when sanding to avoid inhaling paint particles or dust. You can do this by hand with sandpaper or use an electric sander for larger areas. If the old paint is blistered, use a paint remover to strip it effectively.
Smooth the Surface:
After removing the old paint, use sandpaper with a finer grit, such as 40-grit, to smooth the entire surface. This step is especially important if the previous wall surface was glossy or smooth. It helps the emulsion paint adhere better and creates an even base for the primer. Use a brush to sweep away any dust or debris generated during sanding.
Apply a Base Coat:
To ensure a uniform finish and prevent the original colour or pattern from showing through, apply a base coat or primer. You can make your own primer by diluting emulsion paint with water, typically at an 80/20 ratio. This helps achieve a streak-free finish. Alternatively, you can use a cement primer, especially if you're painting on a concrete or cement surface. Apply the primer with a brush, roller, or spray, ensuring even coverage.
Fill Uneven Surfaces:
If there are any holes, patches, or uneven surfaces, use putty to fill and smooth them out. Prepare the putty by mixing white lead chalk ("MITTI") and varnish to create a thick paste. This step is crucial for achieving a smooth finish and ensuring the paint applies evenly.
Allow the Primer to Dry:
Once you've applied the primer and filled any uneven areas, let the surface dry completely. It is crucial to give the primer adequate time to cure before proceeding to the next step. Refer to the manufacturer's instructions for the recommended drying time, but generally, it's best to wait at least 48 hours before proceeding to apply the plastic emulsion paint.
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Choosing the right tools
Plastic emulsion paint is water-based and can be applied to walls using a brush, spray, or roller. The paint is usually applied in 2-3 coats, and each coat must be allowed to dry before the next one is applied. The water in the paint evaporates as it dries, and the film hardens, allowing the subsequent coat to be applied.
- Brushes: Plastic emulsion paint can be applied using a brush. Choose a brush size that is appropriate for the surface you are painting. For example, a small angled brush is suitable for trim or corners, while a larger brush can be used for broader areas.
- Rollers: For a smooth spread of colour across wider areas, consider using a roller brush. Roller brushes are ideal for covering large, open areas quickly and efficiently.
- Spray: For a quick application, you can use a spray to apply the paint. This method is suitable if you want to cover a large area in a short amount of time.
- Painter's tape: Before you start painting, protect the areas adjacent to the wall by applying painter's tape to the skirting boards, floor, ceiling, door frame, and window frames.
- Sandpaper: Sandpaper can be used to rub down the surface and create a smooth and even finish. It is especially useful if the current wall surface is glossy or smooth, as it helps the emulsion adhere more effectively.
- Putty: If there are any holes or uneven surfaces on the wall, use putty to fill them in and create a smooth finish. Putty is made by combining varnish and white lead chalk to form a thick paste.
- Primer: A layer of primer is a base coat that is applied to the surface before painting. It helps to seal off existing damp patches and ensures that the paint adheres properly. You can make your own primer by diluting emulsion paint with water.
- Rags: Clean rags can be used to scrub, rinse, and dry the wall before painting. They can also be used to remove excess paint from brushes and rollers after use.
- Buckets: You will need a bucket to mix and store your paint. Place a bucket under the cheesecloth or tights when straining the paint to remove any solid pieces.
- Cheesecloth or tights: Before using the paint, strain it through cheesecloth or tights to remove any lumps or solid pieces that may have formed during storage.
- Paint stirrer: Use a wooden paint stirrer to quickly combine and mix the paint before use.
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Applying the paint
When applying plastic emulsion paint, it is important to prepare the surface and ensure it is clean and free from dust. Remove any previous unstable paint by sanding, either by hand with sandpaper or with an electric sander, and always wear a protective mask when removing old paint. It is also important to apply painter's tape to any surfaces adjacent to the wall, such as skirting boards, the floor, the ceiling, and door and window frames.
Before painting, it is a good idea to strain and stir the paint, as emulsion paint can develop lumps and skin if it has been sitting in storage. Place tights or cheesecloth over the paint bucket and pour the paint into a separate bucket to strain most solid pieces. Then, use a wooden paint stirrer to quickly combine the paint.
Plastic emulsion paint can be applied using a brush, spray, or roller. When using a brush, ensure that you apply uniform brush strokes. If using a roller, opt for a roller brush to ensure a smooth spread of colour across wider areas. It is recommended to let each coat dry before applying the next one, and 2-3 coats should be enough. The paint dries by evaporation of water content, and as soon as the water is evaporated, the film becomes hard and the next coat can be applied.
Emulsion paint can also be used to create various paint effects, such as sponging, stippling, dragging, graining, stencilling, and rag-rolling. To dilute the paint for these effects, mix it with about 10% water. You can also experiment by painting emulsion over a coat of different coloured oil-based paint to create a crackle-graze effect.
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Aftercare
Once you have finished painting, you will need to clean your brushes and rollers. Start by rubbing excess paint onto some newspaper, then soak the tools in soapy water. Rinse them with clean water and dry them with paper towels.
Any leftover paint should be stored in an airtight container, covered with plastic wrap and a lid. Do not store it in very cold or hot temperatures.
Plastic emulsion paint is washable and easy to maintain. You can clean your painted walls with warm water and a mild detergent. Rinse with clean water and dry the wall with a clean rag.
If you need to touch up your paintwork, the surface should be allowed to dry for at least 48 hours before you start painting again. You can then apply a new coat of paint in the usual way.
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Frequently asked questions
Preparation is key to a good finish. First, clean the surface with soap and water and allow it to dry for at least 48 hours. If there is old paint on the surface, remove any blistered paint with a paint remover. If the old paint is sound, rub it down with sandpaper. If there are any unevenness or holes, fill them with putty.
You can apply plastic emulsion paint with a brush, roller, spray, or airbrush. For larger areas, use a roller brush to ensure a smooth spread of colour. For edges or detailed work, use a smaller brush.
Plastic emulsion paint dries quickly, usually within two hours, depending on the viscosity of the paint.
