"is a painting book for the drawing of leaves, initials and patterned backgrounds in different color combinations; even the composition of the colors is described in detail. The book decorations described in this manuscript can be found in the earliest period of printing in several Gutenberg Bibles, including the Göttingen copy of the B42"
The manuscript arrived in Göttingen in 1770 with the bequest of the library of Johann Friedrich Armand von Uffenbach. It was published in print as Lehmann-Haupt (ed) The Göttingen Model Book. A Facsimile Edition and Translation of a Fifteenth-Century Illuminators' Manual (1972).
In August 2014 a digital facsimile of the Göttingen Model Book was available at this link.