you don’t need to be limited to working on paper, watercolour ground is an acrylic primer that is designed to be absorbent enough for watercolour
Large-scale watercolour options
I would like to paint watercolours on bigger than 510x380mm. How do I go about it considering this is the biggest pad and I can’t find boards big enough to stretch any paper bigger than this? Do I need to always stretch my paper? Most watercolour papers are available in sheets measuring up to 30 x 22 in for Imperial sheets and A1 sheets measuring 84.1 x 59.4 cm. We sell drawing boards that will fit both sizes.