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Ekorshe Chalking Powder for Gesso & Primer  is a finely powdered natural chalk. It is perfect for creating paint primers (gesso) or water-based decoupage primers. Weight 700 grams.

Acrylic gesso:

  • 1 part acrylic polymer gloss medium
  • 1 part titanium white acrylic paint
  • 1 part chalking powder dissolved in water

First dissolve the chalk powder in enough water to make a paste. Then squirt in equal parts of acrylic polymer gloss medium and white paint. You don’t have to be exact in these ratios. For example, if you don’t need the gesso to be very white, you could leave out the titanium white acrylic paint. If you want very white gesso, try adding 2 or 3 times as much white acrylic paint. Mix the chalking paste with the paint and gloss medium until it’s smooth. Done!

Brush the gesso over your surface before you paint with acrylics. We  recommend to apply two layers of gesso before starting painting.

Traditional Oil Gesso

  • 1/2 cup (70 g) of dried animal glue
  • 4 cups (950 mL) of water
  • 1 part chalking powder
  • Titanium white pigment, optional

First soak dried animal glue in water for at least 3 hours. Use 1/2 cup (70 g) of dried animal glue and 4 cups (950 mL) of water. Then heat the glue solution in a double boiler until it reaches 60 °C (140 °F). Stir the solution occasionally as the glue dissolves and becomes slightly sticky and thick. It’s important to turn off the burner before the solution boils or gets hotter than 60 °C (140 °F). You can use an instant-read thermometer to determine the temperature. The glue solution should look like thick chicken broth. If the solution boils, the gesso won’t stick to your material very well.

Next, let the glue solution cool and weigh it and weigh an equal amount of chalking powder. If you want your gesso to be even whiter, scoop out 1/2 of the chalk that you weighed and replace it with titanium white pigment. Stir the chalk into the solution until the gesso is smooth. Last step is to stretch a stocking over a storage container and strain the gesso through it. Voila!

Brush the gesso over your surface before you paint with oil. We  recommend to apply two layers of gesso before starting painting.

Weight 0,750 kg

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