Printed In House and signed in the bottom right hand corner by Roger. These prints comes complete with a certificate of authenticity. Generally, the Paper used is either A3 or A4 size, Canon Photo Paper Plus Satin, which is a semi gloss paper 260 gsm, that has outstanding, vivid colour reproduction with sharp detail, exceptional image quality and excellent fade resistance for longevity.Roger uses the genuine Canon ChromaLife100+ dye based inks for his in-house prints.