The term denotes the quantity of an adhesive, typically measured in ounces, specifically formulated for use in gilding. This adhesive, often referred to as ‘size,’ is the critical medium that allows gold leaf to adhere to a surface. For instance, a four-ounce container of this material would indicate the volume available for application in a gilding project.
The appropriate amount of this specific adhesive is crucial for successful gold leaf application. Too little, and the gold will not adhere properly, resulting in a flawed finish. Too much may lead to an excessively tacky surface, attracting dust and potentially causing the gold leaf to shift or wrinkle. Historically, artisans relied on precise measurements and formulations of size to achieve durable and visually appealing gilded surfaces on various objects, from furniture to illuminated manuscripts.