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Natural Pigments Aluminum Sulfate (Alum) White crystalline powder

The minimum order amount for this product line is $30.00
Natural Pigments Aluminum Sulfate (Alum) 100 g - Color: White crystalline powder Natural Pigments Aluminum Sulfate (Alum) 500 g - Color: White crystalline powder Natural Pigments Aluminum Sulfate (Alum) 1 kg - Color: White crystalline powder
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Product description

Aluminum sulfate is a widely used industrial chemical, sometimes referred to as alum.

When dissolved in a large amount of neutral or slightly-alkaline water, aluminum sulfate produces a gelatinous precipitate of aluminum hydroxide, Al(OH)3. In dyeing and printing cloth, the gelatinous precipitate helps the dye adhere to the clothing fibers by rendering the pigment insoluble. It is also used to fix dyes on mineral substrates to produce lake pigments by precipitating aluminum hydroxide with an alkali.

It is most often used by artists to harden glue and starch sizes. Spray a solution of aluminum sulfate and water onto rabbit skin glue or onto gesso or chalk grounds to harden them or add directly to size. For size, use 10 grams for each 100 grams of dry glue. Dissolve the aluminum sulfate in water, heat until completely dissolved and add the warm solution to the glue solution.

Typical Properties
Chemical Name: Aluminum Sulfate Octadecahydrate
Chemical Formula: Al2(SO4)3•18H2O
CAS No.: 7784-31-8
Mesh (%): 100% 100 mesh
Color: White crystalline powder

Store in a cool, dry, ventilated area away from sources of heat, moisture and incompatibilities. Aluminum sulfate absorbs moisture and becomes a safety hazard when spilled because it absorbs moisture and becomes slippery. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.

Safe Handling
Aluminum sulfate may cause irritation to the respiratory tract. Ingestion of large amounts may cause nausea, vomiting and abdominal spasms.  May cause irritation upon skin and eye contact. Refer to Material Safety Data Sheet.

Environmental Hazards
No information is available about its potential hazard to the environment. If product is spilled, comply with Federal, State and local regulations on reporting spills. Refer to Material Safety Sheet and labels for further details.

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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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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