Water-based Canvas

Silica, often referred to as "water glass" or "Liquid Silica," can be used in the preparation of a sizing or primer for canvas that is intended for use with water-based paints or mediums. This is because it has good compatibility with water-based systems and can help to improve the adhesion of paint to the surface of the canvas.
Here's how you might use silica:
1. **Preparation of Silica Solution**: You'll need to prepare a solution of silica. Typically, this involves dissolving silica in water. The concentration of the solution will depend on your specific needs. A common ratio is 2 parts water to 1 part silica, but this can vary.
2. **Application**: Once you have your silica solution ready, you can apply it to your canvas using a brush or spray. The application method will depend on the viscosity of your solution and the type of canvas you're working with.
3. **Drying**: Allow the canvas to dry completely after application. The drying time will depend on the humidity and temperature of your environment. It's important to let it dry fully before proceeding to painting, as any moisture could affect the paint's performance.
4. **Use with Water-Based Paints**: After the sizing/primer has dried, you can then proceed to paint on the canvas using your chosen water-based paints. The silica should provide a good base for the paints to adhere to, improving both the durability and the vibrancy of the colors.
It's worth noting that while silica can be effective in many scenarios, there are other materials that might be more commonly used for this purpose, such as PVA (Polyvinyl Alcohol) or other types of sizing specifically designed for canvas. These alternatives may offer different properties, so your choice should be based on the specific requirements of your project. Always test small areas first when trying out new materials to ensure they meet your expectations.