Varnishing a gouache painting should be avoided, because the varnish drastically affects the depth, darkness and finish of the work. And should anyone want to retouch the painting again at some point in the future, perhaps for restoration purposes, the varnish will not come off.
Once the paint surface of your gouache painting is sealed with watercolor varnish, you can apply an isolation coat to it. This coat will create a permanent barrier. Any varnish added after this coat can be removed safely. Most removable varnishes can be removed with turpentine or mineral spirit.
How do you seal gouache on canvas? You can spray a few light coats of stain-resistant spray varnish (or fixative) on watercolors or gouache, being sure to do so outdoors during the warmer months or in a well-ventilated area during the colder months. A good varnish to use is Krylon® UV Archival.
Yes, you can. You'll want to wait for the watercolor to dry for several hours before applying Mod Podge on top.
I know that when you make a dry palette of gouache you might want to put a drop of honey or vegetable glycerin so it will stay in place and not crack!
Cracking can usually be attributed to one of two things when using gouache: If insufficient water is used to dilute the colour, the thicker film may crack as the paint dries on the paper (note that the amount of water needed will differ with each colour).
Because gouache is almost always done on paper, it is important to limit the amount of sun exposure to the piece. With too much sun exposure, the colors may start to fade and become less saturated than when initially put down.
Happily, gouache is versatile and works well on both paper and canvas which is ideal if you have a preference towards one or the other. For gouache painting on paper, Reeves watercolour paper is perfect; it is designed to take water-media already and is robust enough to handle this heavier type of paint.
We would recommend one of our professional spray or liquid matte varnishes to ensure you keep the same Acrylic Gouache flat, matte surface finish. They are all completely compatible with Liquitex Acrylic Gouache and are also water-based – just remember to leave your paint to completely dry before applying.
Gouache can be made water resistant by mixing with acrylic medium. If you want to do this because colour is dusting off, see below. The more medium you add, the deeper the tone will become and you will reduce the characteristic matt gouache finish.
Both gouache and watercolour are known as great beginner mediums. So when you are starting with painting you might have been introduced to both.
Gouache dries very fast and has the ability to become transparent enough to be used in a technique called glazing. By thinning the paint with water, you can layer it on top of painted areas that are dry to enrich an existing color or create a new one.
It is possible to use our permanent spray varnish on gouache on canvas and this will enhance its levels of waterproofing. However if you want to continue painting on top, your next layer of paint will not adhere to the varnished surface effectively. Works in gouache are better protected under glass rather than varnish.
You have total freedom to experiment with different brush types (like natural hair), but synthetic watercolor brushes are great for painting with gouache. The softer texture allows fluidity with the paint and the ability to create delicate detail. Pro Tip: Always carefully wash your brushes after painting with gouache.
If you've never heard of it, Gouache (pronounced gwaash) is the slightly misunderstood paint that essentially works as an opaque watercolor.
With gouache, you don't have to worry about your paints drying out like other paints because it can still be used by applying water to it when dry.
The paint is also water-resistant, but not waterproof, and it can be damaged if exposed to excessive moisture or water. You will need to waterproof items if you are going to leave anything painted with acrylics outside. Gouache does not handle dust or light well and is not water-resistant.
Framing the work behind glass will help. Remember to put a small distance between the glass and the work itself – paintings placed directly against glass are prone to condensation and the growth of mould. A mount between the paper and glass allows just enough circulation to prevent this.
Paper or other surface to paint: Gouache works well on watercolor paper, but you could also use some thick drawing paper. While you can use canvas, that's typically better suited for acrylic. Overall, your best option is paper for gouache.
"Take a piece of soaked micro fiber sponge and tightly wrap it with baking parchment paper . I placed mine in a medium sized watercolour tin box so I could take it on location. "It works really well, especially with the tube squeezed colours. The mixed colours don't last as long due to their being thinned out more.
Can Gouache Be Used After It Dries? Gouache is one of the most practical paints (read: very practical) because even after it dries in your palette, it can be reactivated by dropping a few drops of water on it. It is even possible to reactivate an entire dried out tube with glycerin and water.
Watercolours and Gouache colours in tubes
The shelf life of colour tubes such as watercolours and gouache, or water-based colours, is shorter. We indicate the prospective shelf life to be 5 years. The colours are often still useable after a much longer time.