Gesso is a base upon which to lay gold leaf, why use it? Mainly because it opens up a whole new world of creative possibilities for those working with a surface that can accept gesso.
You can purchase a ready made gesso made from acrylics, but you cannot burnish this gesso, I never use it myself, the main reason being I have got used to making my own. I When it comes to making your own gesso there are very many recipes to choose from, each one depends on what the basic ingredients consist of as to how the gesso turns out. I have tried many recipes and most work out ok but seldom do I get the right consistency from another persons recipe, this is because gilders whiting, the white powder gesso is made from differes from region to region, also the make up of the glue used in the recipe varies widely I have found.
I use a simple recipe we developed from trying many others, it simply consists of gilders whiting (finely ground chalk) animal glue and water, it is simple to make and gives very good results
The recipe I use here is based on the ingredients I sell from this site, so it should work fine for you if you use my ingredients, all recipes are given in the manual you will recieve when you make any purchase from this site
The thickness of the gesso you need will depend on the item to be gilded, if you are wanting to gild something with fine detail you will need a thinner gesso than if you want to obtain a rough distressed finish. The thinner gesso should be built up in coats, whereas the thicker gesso only needs one coat.
The only equipment you need is a special water jacketed glue boiler, however these are expensive so I make do with a tin can placed inside a saucepan, the can needs to be placed on spacers to keep the botttom of the can away from the heat.
The glue should never exceed about 135 degrees Farenheit or 57 Celsius. Exceeding this temperature will dramatically weaken the glue's ability to adhere.
In practice this means keeping the saucepan on a low heat.
Put the glue and water into the can and leave overnight or untill all the glue has dissolved in the water, I normaly heat the water first, this speeds up the melting of the glue.Then gently sift the chalk or whiting into the water and stir gently taking care that air bubbles do not form.I keep the flame under the saucepan turned down very low so that the water is only just being heated by a very low flame.
Then it is simply a question of brushing on the gesso in whatever way you desire, if you are gessoing a complex picture frame you will want to keep the coating as thin as possible in order to maintain the shape of the frame. If however your main interest is in making the surface look irregular and "interesting" you can manipulate the thicker gesso into peaks.
When you have finished laying the gesso you can then apply the red ground mentioned on the "grounds" page, when dry the leaf can then be applied...and remember all these process's are covered in the manuals available from the download page.