Cómo preparar cal para pintar sin que se caiga
Pinting with lime is a traditional and eco-friendly method that has been used for centuries. Lime paint not only provides a unique aesthetic but also offers excellent durability and breathability. However, to ensure that the lime paint does not peel or crack, proper preparation of the lime is essential. In this article, we will guide you through the process of how to prepare lime for painting without it falling off.
Firstly, it is crucial to select the right type of lime for your project. The most commonly used lime for painting is slaked lime, also known as calcium hydroxide. This type of lime is readily available and can be found at most hardware stores. Avoid using unslaked lime, also known as quicklime, as it is highly caustic and can cause severe burns if it comes into contact with skin or eyes.
Once you have obtained the slaked lime, the next step is to slake it further. This process involves mixing the lime with water to create a lime slurry. To do this, fill a bucket with water and slowly add the lime powder while stirring continuously. It is important to add the lime powder to the water, rather than the other way around, as adding water to lime powder can cause a violent reaction that may splash lime powder into the eyes or onto the skin.
Allow the lime slurry to sit for at least 24 hours. During this time, the lime will absorb the water and begin to slake. The slurry will become thicker and more pasty as the lime particles hydrate. After 24 hours, you can test the slurry by stirring it. If it is too thick, add a small amount of water and mix well. If it is too thin, add more lime powder and mix until the desired consistency is achieved.
Next, it is time to strain the lime slurry. Use a fine-mesh sieve or a cheesecloth to separate the lime particles from the water. The water, now known as lime water, can be reused for future lime paint applications. The strained lime particles, or lime putty, are what you will use to create your lime paint.
To make lime paint, mix the lime putty with linseed oil or another natural oil. The ratio of lime putty to oil should be approximately 1:1. Stir the mixture until it is well combined and forms a smooth paste. If the mixture is too thick, add a small amount of water or linseed oil to achieve the desired consistency.
Finally, apply the lime paint to your surface using a brush, roller, or sprayer. Ensure that the surface is clean, dry, and free of dust or debris. Apply the lime paint in thin, even coats, allowing each coat to dry completely before applying the next. Once the final coat is dry, your lime paint should be durable and resistant to cracking or peeling.
In conclusion, preparing lime for painting is a straightforward process that requires patience and attention to detail. By following these steps, you can ensure that your lime paint will adhere to the surface and remain in place for years to come. Happy painting!
