Gouache vs. Watercolour

Attribute	Gouache	Watercolour
Opacity	Opaque	Transparent
Consistency	Thicker	Thinner
Drying Time	Quick	Slow
Layering	Can layer easily	Difficult to layer
Color Intensity	More intense	Less intense

Introduction

Both gouache and watercolour are popular mediums in the world of painting, each with its own unique characteristics and qualities. While they may seem similar at first glance, there are distinct differences between the two that artists should consider when choosing which medium to work with. In this article, we will explore the attributes of gouache and watercolour, highlighting their strengths and weaknesses.

Opacity

One of the main differences between gouache and watercolour is their opacity. Gouache is known for its high opacity, meaning that it can completely cover underlying layers of paint. This makes it a great choice for artists who want to create bold, opaque paintings with rich, vibrant colors. On the other hand, watercolour is transparent, allowing light to pass through the layers of paint and creating a luminous effect. This transparency is what gives watercolour paintings their characteristic ethereal quality.

Color Mixing

When it comes to color mixing, gouache and watercolour behave differently. Gouache is more forgiving when it comes to mixing colors, as it can easily be reactivated with water even after it has dried. This makes it easier to achieve the desired hue and value in a painting. Watercolour, on the other hand, requires more precision and planning when mixing colors, as it dries quickly and cannot be easily reworked once it has dried. Artists who enjoy the challenge of working with a medium that requires careful planning may prefer watercolour for its unique characteristics.

Texture

Another important factor to consider when choosing between gouache and watercolour is the texture of the paint. Gouache has a smooth, matte finish that can be built up in layers to create a rich, velvety texture. This makes it ideal for creating detailed, realistic paintings with a high level of control over the final result. Watercolour, on the other hand, has a more fluid, transparent quality that allows for subtle gradations of color and a sense of spontaneity in the painting process. Artists who enjoy working with a medium that allows for more experimentation and unpredictability may prefer watercolour for its unique texture.

Application

When it comes to application, gouache and watercolour require different techniques and approaches. Gouache is best applied with a thick, opaque layer of paint, using a brush or palette knife to create bold, expressive strokes. Watercolour, on the other hand, is typically applied in thin, transparent washes, allowing the white of the paper to show through and create a sense of luminosity in the painting. Artists who prefer a more controlled, precise approach may find gouache to be the better choice, while those who enjoy a looser, more spontaneous style may prefer watercolour.

Conclusion

In conclusion, both gouache and watercolour are versatile mediums with their own unique attributes and qualities. Gouache is known for its high opacity, forgiving nature when it comes to color mixing, and smooth, matte texture, making it a great choice for artists who want to create bold, opaque paintings with a high level of control. Watercolour, on the other hand, is transparent, requires more precision when mixing colors, and has a fluid, transparent texture that allows for subtle gradations of color and a sense of spontaneity in the painting process. Ultimately, the choice between gouache and watercolour comes down to personal preference and the desired outcome of the painting.