Add-on PrintPrinted copies of your original house portrait illustration. Since every house portrait is a one of a kind illustration, an add on print allows you to purchase high quality copies of the drawing to gift to many more people. The add on prints are high res scans of the original drawing, printed on thick and durable matte paper. Each print is gicle printed on archival, acid free paper, ready to frame. Specs Paper thickness: 10. 3 mil Paper weight: 5. 57