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Bianco di San Giovanni 500g

SKU : NAP-475-4150
Bianco di San Giovanni 500g
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 1   US$ 34.31 
 2   US$ 34.10 
 3   US$ 33.98 
 4-5   US$ 33.90 
 6-7   US$ 33.78 
 8-11   US$ 33.69 
 12+   US$ 33.57 
Price: US$ 34.31
US$ 34.31

Product description

Bianco di San Giovanni is lime white pigment first described in literature by Cennino Cennini. D. V. Thompson says the name comes from the patron saint of Florence.

Pigment Names
Synonyms: lime white, Armenini's white, Cennini's white, Saint John's white

Origin and History
Cennino Cennini uses the name "Bianco di San Giovanni" to describe the preparation of a white lime pigment in his book Il Libro dell’Arte. He does not explain the name used for this lime white, and it is probable therefore, this important white pigment was in use by artists before Cennini's time. D. V. Thompson says it gets its name after the patron saint of Florence.

Bianco di San Giovanni is a pigment of inorganic, natural mineral origin from limestone (calcium carbonate) deposits. Not to be confused with simple lime white or chalk, Bianco di San Giovanni, as Cennino Cennini reports, is dried lime which is reduced to powder and then immersed in the water for eight days that is changed each day. It is then made into small cakes that are left to dry in the sun. It is then grounded finely.

Bianco di San Giovanni primarily consists of calcium hydroxide, also known as slaked lime, in a chemical compound with calcium carbonate. A traditional name for calcium hydroxide alone is slaked lime, or hydrated lime. The name of the natural mineral is portlandite. A suspension of fine calcium hydroxide particles in water is called "milk of lime." When dissolved in water, the solution is called "lime water." Bianco di San Giovanni is composed of slaked lime, and because it is dried in the sun, it absorbs carbon dioxide from the atmosphere and partially converts to calcium carbonate, or lime.

Permanence and Compatibility
Bianco di San Giovanni is considered the white pigment par excellence for fresco painting. It is used also in tempera and grounds while it is not advised in oil and encaustic painting techniques.

Oil Absorption and Grinding
Lime white should be finely ground before using in fresco, casein or egg tempera painting techniques.

Bianco di San Giovanni is not toxic, however, it is alkaline and may irritate the skin and eyes. Care should be used in handling the dry powder pigment to avoid inhaling the dust.

Pigment: Lime White (Bianco di San Giovanni)

Pigment Information
Color: White
Colour Index: -
Chemical Name: Calcium Hydroxide, Calcium Carbonate
Chemical Formula: Ca(OH)2, CaCO3
ASTM Lightfastness Rating
Acrylic: Not Tested
Oil: Not Tested
Watercolor: Not Tested
Specific Gravity: 2.24
Density: 2.211 g/cm3
Hardness: 2.5
Refractive Index: 1.65
Solubility: 0.185 g/100 cm3
Ksp = 7.9 x 10 −6

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.
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Product weight: 1.10 lbs

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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Detailed images
Bianco di San Giovanni 500 g
Pigment: Lime White, Bianco di San Giovanni
Bianco di San Giovanni 500 g

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