Idris Khan: blurred lines

Idris Khan takes photographs of photographs and sandblasts hundreds of minute lines of text on to marble and steel. Novelist Justin Cartwright meets the artistIdris Khan’s studios are full of light, cluttered in an enviable and rather chic fashion, everything the successful young artist could aspire to, with assistants working away, a lovely kitchen, a palpable feeling of success and energy – and C-types up on the wall.I must confess I did not know what a C-type was until I went to his studi