Drawing Techniques: a Guide
Function: Sketch Books  
Beginning in the early Renaissance artists kept their informal drawings from nature and first ideas in sketch books of various sizes. This practice was derived from the medieval model book, in which artists recorded their finished ideas for study within their workshops and application in finished works or art. In the fifteenth century metalpoint and prepared paper were considered the ideal media for sketch books, but chalks and pen and ink replaced it early in the sixteenth century, succeeded by the graphite pencil in the nineteenth.  


Model books
First idea