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ArtistSupplySource.com » » » Natural Pigments Casein 1 kg
 

Natural Pigments Casein 1 kg

SKU: NAP-510-63301K
Natural Pigments Casein 1 kg
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 1   US$ 41.44 
 2   US$ 41.19 
 3   US$ 41.05 
 4-5   US$ 40.94 
 6-7   US$ 40.80 
 8-11   US$ 40.69 
 12+   US$ 40.55 
Price: US$ 41.44
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Subtotal:
US$ 41.44


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Product description

Details
Casein is a milk protein that is insoluble in water, but can be made into a water-based paint or glue by dissolving in water with an alkali, such as borax or ammonia. It makes a fast-drying paint that was used in ancient Egypt as tempera paint and widely used by commercial illustrators. One of the qualities that artists value casein paint for is that, unlike gouache, it dries to an even consistency making it ideal for murals. It also works well as an underpainting for other painting techniques, such as oil painting.

Casein Lime Paint
Ingredients
100 parts by weight Casein (powder)
100 parts by weight Slaked Lime (calcium hydroxide)
800 parts by weight Chalk
1 part by weight Borax
Mix the powders together thoroughly. The combined powder can be stored indefinitely in this form and water added when needed. Once water is added, it must be used right away. To prepare the paint, add 50 parts by weight of water to 100 parts by weight of the combined powder with constant stirring. Continue stirring until the mixture is smooth and free from lumps. Next, cover the mixture with a thin layer of water and let stand for half an hour. Add more water until a workable paint is obtained of about the same consistency of house paint. It should be used without delay, as it will set hard in a relatively short time, becoming unfit for use in about twelve hours. Color pigments can be added to this mixture to make a wide variety of tints. Simply add an amount of pigment and reduce the chalk by the same amount.

Casein Borax Paint
Ingredients
15 parts by weight Casein (powder)
100 parts by weight Cold Water
5 parts by weight Borax
25 parts by weight Hot Water
50 parts by weight Chalk
15 parts by weight Pigment(s)
Place the casein in a bowl and pour in the cold water. Let it soak for at least one hour. Stir the borax into the hot water in a saucepan or pot until dissolved. Stir the casein solution until smooth and free from lumps. When the casein solution is smooth, add the borax solution to it with stirring. Heat this mixture to 82° C. (180° F.) using a double boiler for a maximum of 15 minutes then allow it to cool. Gradually sift in the chalk, mix until smooth and let stand for half an hour. Add the pigment and adjust the thickness of the paint by adding more water. It should be used without delay, as it will set hard in a relatively short time, becoming unfit for use in about twelve hours. Color pigments can be added to this mixture to make a wide variety of tints. Simply add an amount of pigment and reduce the chalk by the same amount.

Casein Borax Paint (For Artists' Use)
Ingredients
15 parts by weight Casein (powder)
100 parts by weight Cold Water
5 parts by weight Borax
25 parts by weight Hot Water
Place the casein in a bowl and pour in the cold water. Let it soak for at least one hour. Stir the borax into the hot water in a saucepan or pot until dissolved. Stir the casein solution until smooth and free from lumps. When the casein solution is smooth, add the borax solution to it with stirring. Heat this mixture to 82° C. (180° F.) using a double boiler for a maximum of 15 minutes then allow it to cool. Pre-wet your pigments with water and add the cooled casein solution to the pigment until you have the consistency you desire. Thin this paint with water for use.

As with all water-based paint, the pigment has to be wetted first. This is done by adding small amounts of water to the dry pigment. Using a palette knife or spatula, mix the water into the pigment until it has a paste consistency. Add the casein solution to the pigment paste sparingly. The casein to pigment ratio cannot be given in exact proportions. The amount of pigment varies according to the pigment. To test for sufficient binder, apply a small amount of the paint to a substrate and allow to dry. If the pigment comes off after a gentle rubbing, add more casein solution. Once pigment and binder have been combined to the desired consistency, the resulting paint can be thinned with water.
The shelf life of casein is indefinite if store in a cool, dry area.

Specifications
Appearance: White powder
Moisture Content: 9-12%
Ash Content: 4% maximum
Fat Content: 3% maximum
Protein Content: 82-88%
Solubility: Complete in 15% borax
Viscosity (ammonia method): 700-3200 cps (15% total solution @ 25° C.)
Particle Size: 30 U.S. Mesh






Specifications:

Appearance: White powder
Moisture: 9-12%
Ash Content: 4% maximum
Fat Content: 3% maximum
Protein Content: 82-88%
Solubility: Complete in 15% borax
Viscosity: 700-3200 cps (15% total solution @ 25° C.)
Average Particle Size: 30 U.S. Mesh


Natural Pigments

Natural Pigments is a limited liability company based in Willits, California. We manufacture and distribute rare and hard-to-find materials for fine artists and decorators. We specialize in supplying artists' materials that were used in historical painting since pre-historic times up to and including the nineteenth century.

We constantly search for materials and products of the finest quality so that we can bring them direct to you from the source. To do so, we travel the world to find materials specifically for use by professional artists and decorators. We obtain minerals from mines in Afghanistan, Chile, Russia, Ukraine and Uzbekistan, to name a few places, processing these into natural pigments. We purchase resins, gums and plants from India, Kenya and Malaysia to make natural varnishes and painting mediums.

Our mission is to provide the largest variety of natural pigments, paints and other professional artists' supplies, enabling us to bring you a selection that makes shopping for rare and hard-to-find art materials easy. Our objective is to promote the education and use of these materials among artists by providing detailed information for their employment in encaustic, fresco, oil, watercolor and tempera painting.
All Natural Pigments products

 
This product is shipped from our warehouse in Gretna, NE, USA.
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
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