What is gesso?

Gesso, pronounced ‘ jesso ‘, was traditionally used to prepare or prime a surface so Oil paint would adhere to it. Gesso is the same as a flat coat, as in ‘ pre-primed canvass ’. It is made from a combination of key pigment, chalk and binder. traditional Oil ‘ glue gesso ’ was made with an animal glue binder, normally rabbit-skin glue, chalk, and ashen pigment, normally Titanium white.

Gesso is normally white or bone and is used after you have sealed the sensitive canvas with a coat of size ( see : the Trouble with Oil ) It creates a surface that is both absorbent material ( particularly utilitarian for ‘ all in ’ colouring with oils ) and has a ‘ tooth ’ ( texture ) that allows rouge to grab onto the surface…

So what is Acrylic Gesso?

Modern acrylic gesso is a combination of calcium carbonate ( methamphetamine ) with an acrylic polymer medium ( binder ), a pigment ( titanium white ) and other chemicals that ensure flexibility, and ensure long archival life .

Why do I need to use a gesso primer for Acrylic painting?

technically you don ’ thyroxine. But in practice painting directly onto a raw canvas is not an enjoyable have. Unless you are concerned in deep stain effects like Morris Louis
 who became fascinated with using diluted acrylic key to stain the raw canvas tent, rather than apply with a brush. Alpha-Pi, 1960
Morris Louis (American, 1912–1962)
Acrylic on canvas

Can I use acrylic gesso under an oil painting?

Yes and no. Yes for 90 % of your paintings specially if your precisely beginning ‘ acrylic gesso ‘ will be fine if the raw canvas has been properly sized, thus protecting the canvas from the corrosive nature of oil. however, if it was for a portrayal or to produce a masterpiece for your paint bequest I would use an oil gesso strictly for the fact it has been tested and the Oil will constantly adhere better to Oil than sitting on exceed of an Acrylic. Pro tip : If you want the first layer of key to dry quicker than it normally might, just add gesso. The gesso fuse layer can soak up the oil from within the paint and leave a ‘ dead ’ bland underpainting that won ’ t have any shininess to it. Imagine the dispute between painting onto looking glass and painting onto blotting paper. All the oil from the paint would be absorbed into the flat coat layer.

Do I need to buy it?

Homemade or ready made? Shop bought gesso comes pre-prepared in tub or tubes and is pretty good, homemade gesso is cheaper to produce and can be adjusted to personal needs and tastes, however, it ’ s not needed when you are first base starting painting. Artist or Student quality? As with paints, the dispute between the two is dependent on monetary value. The artist quality having a higher price, more pigment, and a higher opacity. The scholar quality will have a lower measure of paint and more makeweight. If you are painting onto a raw canvas the artist quality would be best due to the increased opacity. For adding a act more absorbency to a pre-primed canvass student quality would be fine ( you can constantly add a bit more ashen pigment to it ) .

Can I colour the gesso?

Yes, I am a big fan of working on a coloured ground and if you are pushed for time you can mix some paint into the gesso to tint it. You can besides buy premixed black gesso, coloured gesso and clear gesso .

Pre-primed canvas boards

“ Pre-primed ” means “ pre-gesso ” It already has a gesso layer applied in the factory. On the cheaper ranges for some reason manufacturers frequently use a seal on top which creates a glazed surface which is completely ridiculous… defeating the object of gesso !
If you are using watered down key or scholar quality paints the bright surface can repel the paint. The more watery the paint the easier it will sit on the come on and not soak into the sail as you would like. If you apply a couple of coats of gesso it will form a more absorbent material surface due to the chalk ( calcium carbonate- known as ‘ whiting ’ in anoint painting ) found in the gesso .

Creating a super smooth finish

You can sand gesso between coats to create a cover girl smooth finish, particularly handy for photo-realistic paintings, just sand each level with a all right emery paper. Say a 240 backbone. 3M ’ s make a beneficial sandpaper. Just make indisputable you do it outside, or in a well-ventilated area as it goes everywhere !

How to gesso a raw canvas for acrylic painting

What You Need :

• Gesso
• Decorators brush
• Kitchen Roll
• 240 grit sandpaper if you want to sand the layers in between each other.

1. Buy a tub of premixed white gesso and give it a stir. Again, this really comes down to personal preference, I work from a tub so I can control the amount of gesso on my brush for each stroke but you can buy it in tubes.
2. The first coat always needs to be diluted with a touch of water (sometimes people recommend adding a bit of acrylic medium to prevent cracking but the layer is so thin and soaks straight in, it would never crack).
3. Allow to dry, then apply a second coat. This can be applied thinly and does not be watered down. If you want a more absorbent surface, add another layer.
4. When applying the gesso turn the canvas 90 degrees between coats to ensure an even coverage.
5. Apply a final coat using the pure, undiluted gesso.
6. Using a 3-inch decorators brush, apply the gesso directly to the stretched canvas in even strokes. Work from the top to the bottom of the canvas, in parallel strokes from one edge to the other.
7. Wash your brush out immediately in running water then use a brush cleaner to thoroughly remove the gesso out. It’s worth cleaning it twice even if you think it’s clean.

Pro tip : golden paints make a hard gesso that can be useful if you are working on a board. Due to the limited movement on a board compared with a analyze, it can create a drum sander stopping point. You might also like: How a prepared canvas can drastically improve your paintings