Dayflower: the extraordinary research into a pigment

Tara talks with Annie Nguyen about her remarkable research.  Blue is a strange colour.  Common in the digital world and rare in the analogue age, blue punctuates cliches and expressions.  Yet blue is rare.  And the rarest of blues is Dayflower.  Annie discusses this odd pigment and how it can offer a fascinating test case in moving art between analogue and digital realms.