Isabella Flores
Varnishing a painting with a gallery wrap can be a daunting task, especially if you've spent a lot of time on your artwork. The process of varnishing a painting involves applying a thin, protective layer of varnish to the surface of the painting. Varnish comes in various finishes, such as gloss, satin, or matte, and it is essential to use the right type of varnish for your painting. For example, if you're using acrylic paint, you should avoid using an oil varnish and opt for a varnish specifically designed for acrylics. Additionally, it is crucial to ensure that the painting is completely dry before varnishing to avoid any streaking or mixing with the wet paint. Artists have also recommended experimenting with different types of varnish to achieve the desired finish and protecting the painting from dust, UV rays, and yellowing.
| Characteristics | Values |
|---|---|
| Purpose of varnish | Varnish is a thin protective layer that shields paintings from dust, UV rays, and yellowing. |
| Types of varnish | Gloss, satin, or matte finish. |
| Application techniques | Spraying, brushing, or rolling on the varnish. |
| Surface preparation | Ensure the painting is completely dry and free from dust, dirt, and lint before varnishing. |
| Tools and materials | Varnish, water (for water-based varnishes), spray bottle or brush, bubble wrap, archival pH-neutral paper, cardboard, plastic wrap. |
| Drying and storage | Allow varnish to dry completely before rolling the canvas. Store in a dust-free environment. |
| Common issues | Mismatched sheens, varnish mixing with wet paint, varnish sticking to bubble wrap or other packaging materials. |
| Varnish removal | Removable varnishes can be taken off with turpentine, mineral spirits, or meths. |
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What You'll Learn
- Preparing the painting: Ensure the painting is completely dry and free from dust, dirt, and lint
- Choosing the varnish: Select a varnish suitable for the paint type—oil or acrylic
- Application techniques: Experiment with different techniques to achieve the desired finish
- Drying and storage: Allow varnish to dry before rolling the canvas and storing it appropriately
- Removing varnish: Use turpentine or mineral spirits to gently remove varnish if needed
Preparing the painting: Ensure the painting is completely dry and free from dust, dirt, and lint
Preparing a painting for varnishing is a crucial step in the process of protecting your artwork. Here are some detailed instructions to ensure your painting is ready for varnishing:
Firstly, ensure the painting is completely dry. For oil-based paintings, it is recommended to wait at least six months, or even a year if the paint is particularly thick. This is to ensure that the varnish does not mix with wet paint and cause streaking. Acrylic paintings should also be given ample time to dry, with a couple of days being sufficient in most cases, and longer if there are thick layers of paint.
Next, prepare your workspace by covering your work surface to catch any varnish drips or spills. Banish any pets or people from the area to prevent stray hairs or lint from drifting onto the wet varnish.
Before you begin varnishing, ensure the painting surface is free from dust, dirt, and any other undesirable substances. You can use a soft, lint-free cloth to gently wipe down the surface of the painting. It is also important to use a separate brush and jar or cup for varnishing to avoid any paint residue contaminating your varnish. Rinse the jar and brush with water beforehand to remove any dust particles.
Additionally, if you plan to use a removable varnish, consider applying an isolation coat before varnishing. This acts as a protective barrier between the painting and varnish, allowing for easier varnish removal in the future. Allow this coat to dry for at least 24 hours before proceeding with varnishing.
By following these steps, you can ensure your painting is properly prepared for varnishing, reducing the risk of imperfections and creating a professional finish.
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Choosing the varnish: Select a varnish suitable for the paint type—oil or acrylic
When choosing a varnish for a painting with a gallery wrap, it is important to select one that is suitable for the type of paint used—oil or acrylic.
Varnish for Acrylic Paintings
Acrylic paintings do not require varnishing. The Smithsonian Institute, for instance, recommends against it from a conservation standpoint. However, if you choose to varnish an acrylic painting, you can choose between a brush-on varnish and a spray varnish. A brush-on varnish provides greater control over the outcome, whereas a spray varnish dries more quickly. You can also choose between a glossy, satin, or matte varnish. A glossy varnish brings out the colours, while satin and matte varnishes create less glare and soften colours. You can mix these varnishes to get your desired finish or apply one type on top of another to alter the final look.
Varnish for Oil Paintings
Oil paintings, on the other hand, typically require varnishing. You can choose between a brush-on varnish and a spray varnish. The choice between the two often comes down to personal preference and the final finish you want. You can also choose between a glossy, satin, or matte finish. A glossy varnish enhances deep, bright colours but creates reflections and requires stronger solvents for removal. A matte varnish reduces glare but dulls colours and is easier to remove. A satin finish can be achieved by mixing gloss and matte varnishes or using a dedicated satin varnish.
Additional Considerations
When selecting a varnish, it is recommended to do a test application first on a small piece of painted wood or canvas to ensure you are happy with the final result. This is especially important if you are using a new varnish, adding an isolation coat, or working with a painting that has significantly different colours and values from your previous works.
Furthermore, oil paintings must be completely dry before varnishing, which can take at least six months. You can test if an oil painting is ready to varnish by dipping a cotton bud in Sansodor and gently rubbing it on an inconspicuous area. If no colour comes off on the cotton, you can proceed with varnishing.
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Application techniques: Experiment with different techniques to achieve the desired finish
Application techniques vary depending on the type of varnish used and the desired finish. For instance, spray varnish is a good option for fragile surfaces that could be damaged by a brush, or for paintings with a rough texture, as it helps to avoid creating bubbles or pools of varnish. When using spray varnish, it is recommended to pre-test spray settings and solutions to observe the handling and forming of the varnish before spraying the painting. Spraying should begin at a far corner of the painting, continuing across the surface in an uninterrupted linear pass, maintaining a constant distance of 10-14 inches. For subsequent coats, the spray orientation may be switched by 90 degrees to ensure uniform distribution.
If you are using a brush, it is recommended to use long, smooth brush strokes in one direction, covering the painting in a thin coat, then turn it 90 degrees and use the same long strokes across the wet first coat to ensure an even covering. Make sure to only apply one layer of varnish like this, as applying more can result in a patchy finish.
If you are varnishing a painting with a gallery wrap, you may want to spray the sides first with the painting on the wall, holding up a flat piece of cardboard to cover the front of the painting. Then, spray each side in turn, and spray the front with the painting flat. Alternatively, you can spray the front first and then the sides. For the second coat, you can turn the paintings vertical so that you are spraying across the earlier coat pattern, ensuring that a different bottom edge is covered.
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Drying and storage: Allow varnish to dry before rolling the canvas and storing it appropriately
Drying and storing your painting is a crucial step in the varnishing process. It is essential to allow the varnish to dry completely before rolling and storing your canvas. The drying time will vary depending on the type of varnish used and the number of coats applied. For example, an acrylic painting can be varnished within 24 hours of completion, and some varnishes may require multiple coats, extending the drying time.
To ensure your painting is completely dry, it is recommended to place it in a dust-free environment and avoid touching the surface. You can test if the varnish is dry by gently touching the surface with your finger or a soft cloth. If the varnish feels tacky or comes off on your finger/cloth, it is not fully dry. Good ventilation and low humidity can also expedite the drying process.
Once the varnish is dry, you can prepare your canvas for rolling. Place a sheet of archival pH-neutral paper on top of the canvas to protect the surface. Then, carefully roll the canvas, ensuring that it is taut and even to prevent creases. After rolling, you can secure the canvas with bubble wrap, ensuring that the wrap is not too tight to avoid indentations on the painting's surface.
For storage, it is essential to choose a suitable location that is dry, dark, and temperature-controlled. Avoid exposing the canvas to direct sunlight or extreme temperatures, as this can damage the varnish and painting. Store the rolled canvas vertically or horizontally on a shelf or in a drawer, ensuring it is not placed under heavy objects that could damage it. Additionally, you can consider using a portfolio or storage box specifically designed for artwork to protect your canvas from dust and light exposure.
Proper drying and storage techniques are vital to maintaining the longevity and quality of your varnished painting. By allowing adequate drying time and storing your canvas appropriately, you can ensure the protection and preservation of your artwork.
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Removing varnish: Use turpentine or mineral spirits to gently remove varnish if needed
Removing varnish can be a tricky process, and the solvent used depends on the type of varnish. For instance, to remove an acrylic resin varnish, use mineral spirits, turpentine, or a citrus solvent. On the other hand, a natural resin varnish requires turpentine or a citrus solvent.
If you are using a removable conservation varnish like Golden's or Gamvar, you can use turpentine or mineral spirits to gently remove it. First, saturate a lint-free cotton cloth with the solvent. Then, gently rub the cloth over the varnish layer, working slowly and carefully to avoid removing the paint surface. If you are using gloss varnish, you will be able to see where it is still on the surface.
When removing Gamvar, it is recommended to use Gamsol or another brand of odorless mineral spirits (OMS). This will effectively dissolve the varnish without damaging the painting. If this does not work, you can try using turpentine, but be cautious as it can dissolve some paint mixtures and cause lifting of regular oils. Always work in a well-ventilated area when using these solvents.
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Frequently asked questions
There are various ways to varnish a painting with a gallery wrap. You can use a spray varnish, brush varnish, or a removable varnish. It is important to ensure the painting is completely dry before varnishing and that the surface is free from dust, dirt, and any other undesirable materials.
The type of varnish you use depends on the desired finish. Varnish comes in gloss, satin, or matte finish. Glossy media has a better gamut and black point, but it can limit the placement of artwork due to its reflection. You can also use a water-based varnish, a mineral spirit acrylic varnish, or a removable varnish.
If you are using a spray varnish, it is recommended to spray the sides first with the painting on the wall. Hold up a flat piece of cardboard to cover the front of the painting and spray each side in turn. If you are using a brush to apply the varnish, use a separate brush that is designated for varnishing only.
It is important to avoid using bubble wrap as it can leave imprints on the surface of the painting. Instead, use a layer of parchment paper or plastic wrap, followed by cardboard strips, and then another layer of plastic wrap.
