In 1970 Warhol began discussions with two anonymous Belgian friends with the idea behind this partnership being a commentary on mass production - one of the themes of Warhol’s art. At some point during these talks, the collaboration (named ‘Sunday B Morning’) fell apart, for reasons that remain unknown. But by this point, the Belgians already had the original Factory photo negatives (which the stencils are made from) and the colour codes required to make the stencils and the prints. ‘Sunday B Morning’ began printing regardless and the prints were released in 1970 with a black stamp on the back that read ‘Fill In Your Own Signature’. There is a debate as to whether that idea was originally Warhol’s, and it seems likely given his ‘Famous for 15 minutes’ concepts. History also stands divided as to whether or not Warhol was pleased with the prints - it did after all, fit in with his ideas on mass production.