Karla Black is one of the contemporary artists featured in Tate Britain’s new Watercolour exhibition.03.03.2011 Karla Black is one of the contemporary artists featured in Tate Britain's new Watercolour exhibition.  But her approach to the medium is unorthodox. Mixing paint with other materials such as nail-varnish, vaseline, and body lotion she creates unique sculptural forms. She talked to TateShots about her process, and showed us her latest work at her studio near Glasgow