Applying gold leaf to a mirror involves a careful process of preparing the surface, applying adhesive, and then carefully laying the delicate leaf.
Here are the typical steps involved:
Step-by-Step Gold Leaf Application
The process generally follows these key stages to ensure the gold leaf adheres properly and creates a smooth, desired finish.
1. Prepare the Surface
First, you need to prepare the glass surface. The reference states: "1 Remove the mirror or glass from the frame. If it's not easy to remove, then carefully apply masking tape around the edges of the glass where it meets the frame." This ensures you can work on the glass surface without damaging the frame or getting materials on it. Clean the glass thoroughly to remove any dust, fingerprints, or residues. A clean, dry surface is essential for proper adhesion.
2. Apply the Bole
Next, a primer is often used, especially for traditional gilding. The reference mentions: "2 Apply the bole. Once clean and dry, apply a layer of a coloured primer, usually called 'bole'." Bole is traditionally a clay-based substance that provides a smooth base, enhances the color of the gold, and allows for burnishing later if desired. It's typically red or yellow.
3. Paint on the Size
The adhesive, known as 'size', is crucial for making the gold leaf stick. The reference notes: "3 Paint on the size." Size is a glue or varnish specifically designed for gilding. It comes in different types, such as oil-based or water-based, which have varying drying times. Apply an even, thin layer of size to the area where you want the gold leaf to adhere. The drying time of the size is critical – gold leaf is applied when the size is "tacky," not completely wet or dry.
4. Add the Gold Leaf
This is where the gold leaf is applied. The reference states: "4 Add the gold leaf." Gold leaf is extremely thin and delicate, usually sold in books with tissue paper separating the sheets. You can use a specialized brush called a gilder's tip or gently lay the sheet onto the tacky size. The gold leaf will immediately adhere to the sized area.
5. Smooth with a Brush
Finally, the excess leaf is removed and the surface is smoothed. The reference advises: "5 Smooth with a brush." Once the gold leaf is laid, use a soft brush, like a gilder's mop, to gently press the leaf onto the size and brush away any overlapping pieces or flakes from areas without size. This reveals the sharp edge of the gilded design.
Following these steps, you can successfully apply gold leaf to create decorative effects on a mirror's surface.
