This Winsor & Newton Artists' Acrylic Clear Gesso is a high-quality primer for preparing canvas, paper or other surfaces for acrylic colours.
It adds tooth to ensure that colours will hold, and dries fast and clear, though you can make up a coloured gesso by blending it with acrylic colours.
Winsor & Newton Artists' Acrylic Clear Gesso is also suitable for oils, and will make a pastel surface on paper.