Painting over gold leaf is possible, but it requires proper preparation, primarily sealing the leaf before applying paint.
To successfully paint over gold leaf, the essential first step is sealing the metal leaf. This protects the delicate surface and provides a stable layer for paint adhesion.
Preparing Gold Leaf for Painting
Before you even think about picking up a paintbrush, the gold leaf surface needs attention. Metal leaf, including gold leaf, is very thin and can be easily damaged or react with paint if not properly sealed.
Key Preparation Step:
- Sealing: All metal leaf must be sealed before you start painting. This creates a barrier between the leaf and the paint, preventing potential tarnishing or adhesion issues.
Sealing Based on Gold Leaf Type
The best sealant can depend on the type of metal leaf you are using and the paint you plan to apply.
- Genuine Gold Leaf (22-24ct) & Imitation Silver: If painting with acrylics on gold leaf that contains no copper (like genuine 22-24ct gold) or on genuine/imitation silver leaf, you can seal it with a hard clear acrylic polymer medium in gloss. This specific sealant provides a durable, clear layer suitable for acrylic paint.
- Other Metal Leaf (including imitation gold leaf which contains copper): Other types of metal leaf, particularly those containing copper (which includes most imitation gold leaf), are prone to tarnishing. They typically require a sealant designed to prevent this oxidation, often an oil-based varnish or a specialized metal leaf sealer, before applying subsequent layers like acrylic medium or paint.
The Painting Process
Once the gold leaf is properly sealed according to the type of leaf and paint you're using, you can proceed with painting.
- Ensure Sealant is Dry: Allow the sealant to dry completely according to the manufacturer's instructions.
- Apply Paint: You can now apply your chosen paint (e.g., acrylics, oils) over the sealed surface.
- Layering: Apply paint in thin layers if necessary, allowing each layer to dry.
- Finishing (Optional): Once painting is complete and dry, you may choose to apply a final varnish over the entire piece for added protection.
Why Sealing is Crucial
- Protection: It protects the thin, delicate gold leaf from damage during the painting process.
- Adhesion: It provides a stable surface that paint can adhere to effectively.
- Preventing Tarnish: For metal leaves prone to tarnishing (like imitation gold leaf containing copper), sealing prevents the metal from reacting with the environment or the paint, preserving its appearance.
By following the essential step of sealing the gold leaf, especially with a suitable sealant like a hard clear acrylic polymer medium in gloss for genuine gold/silver leaf when using acrylics as recommended, you can successfully paint over the metallic surface.
