acrylic

In art layering means letting one application of paint dry before adding another. In some painting the layers are translucent, typically with watercolours but oils and acrylics can both be translucent, and so the layers beneath affect the colour of the outcome. In other painting opaque layers are used to obscure parts of the previous layers, for example when painting animal fur a dark layer may go down first followed by gradually lighter areas. In my painting I use translucent and opaque paints in my layering. In contrast some art is created in a single layer such as when working graphically. Think of colouring pages where areas of the painting are filled in, in one go.