Gilding: Mediums, Mordants & Techniques

This is an ongoing project as I learn gilding techniques and better comprehend their application. As part of my own experimentation I have used supports that I am likely to use in a real application, 230gm pergamenata and 100lb Strathmore Bristol Vellum. My intent is to also make a similar test page on parchment when I get the chance. I am testing both modern and period mordants and paints.

There are sources detailing how to make period mordants for gilding, most common of which is Cennini’s Il Libro dell' Arte. My intent is to experiment with the various recipes so that I can make my own batches from scratch, however, since I wanted instant gratification I have so far been using mordants purchased from others.

Updated December 2012: Added information regarding my initial use of purchased gesso. 
Updated October 2012: Added initial thoughts on garlic/glair mixture.
Updated August 2012: Added my findings regarding initial tests of an acrylic-based modern gesso.
Updated July 2012: Minor edits.
Updated May 2012: Added early findings regarding the use of a fish-glue / water mixture, and also Kolner Miniatum.
Updated Dec 2011: Added photographs and re-edited body with more up-to-date information.