To dilute plastic emulsion paint, you typically add clean water, often starting with a ratio of 10% water per litre of paint for the first coat.
Understanding Plastic Emulsion Paint Dilution
Diluting plastic emulsion paint is a common practice, particularly when applying the first coat onto bare, porous surfaces like new plaster or drywall. This process helps the paint soak into the surface effectively, creating a sealed base that improves the adhesion and finish of subsequent coats.
Recommended Dilution Ratio
A common guideline for diluting plastic emulsion paint, especially for the initial coat (often called a 'mist coat'), is to mix 10% water per litre of paint. This means that for every 10 litres of paint, you can add approximately 1 litre of water.
Example Dilutions:
| Paint Quantity | Water (approx.) |
|---|---|
| 1 Litre | 100 ml |
| 2.5 Litres | 250 ml |
| 5 Litres | 500 ml |
| 10 Litres | 1 Litre |
Factors Affecting Dilution
While 10% is a common starting point, this ratio may vary depending on the needs of the project and the type of surface you are painting.
- First Coat (Mist Coat): A dilution of around 10% is typical for sealing porous surfaces and allowing the paint to penetrate.
- Subsequent Coats: Later coats are often applied with little to no dilution, as the base is already sealed. You might add a small amount of water (e.g., 5%) if the paint feels too thick for easy application.
- Surface Porosity: Very absorbent surfaces may require the standard dilution, while less porous or previously painted surfaces might need less or no water.
- Paint Consistency: Sometimes, paint can thicken slightly over time; a small amount of water can restore workability.
How to Dilute
- Use a separate, clean bucket or container.
- Pour the amount of paint you plan to use for that application into the container.
- Measure the correct amount of clean, cold water based on your desired dilution ratio (e.g., 100ml of water for every litre of paint).
- Add the water to the paint.
- Stir the mixture thoroughly using a stir stick or mixer attachment until the water is fully combined and the paint has a smooth, consistent texture.
Always follow the specific instructions on the paint can, as manufacturers may provide recommended dilution ratios for their particular product.
