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Colorobbia Group, the world leader of an Italian-born tradition of ceramics and one of the European largest producers of lead oxides, marks a century of innovation and international enterprise since 1921.
29 companies, 19 countries, over 2.000 employees. 
Colorobbia has a high-tech facility at its plant in Sovigliana Vinci, near Florence, for producing lead oxides. The products are supplied globally.
Red lead oxide, the term commonly used to indicate the lead tetroxide, is a bright red to orange powder commonly used in the production of lead glass, ceramics and as a component in lead acid battery plates.
Today, the main application of red lead oxide is in lead-acid batteries. Capitalising on the experience gained since the turn of the century, we can handle all the specifications that our customers require also using specific instruments.
Red lead oxide is also used as a primer for protecting constructions (such as bridges or ships) in direct contact with salty water. Red lead is practically insoluble in water and alcohol. It dissolves in hydrochloric acid, glacial acetic acid and diluted mixtures of nitric acid and hydrogen peroxide.
The main uses of lead tetroxide (Pb3O4): ceramics, lead batteries, pigments, lead glass and optical glass.
The plant processes metal Pb using the traditional Barton process to make Massicot as the first step. The powder is then refined to “specialise” it according to the production schedule.
The process begins with the introduction of ingots of lead metal with a minimum purity of 99.985%. Once the metal has melted and the required fineness and oxide content has been obtained, the powder or granules (granulated or ground, if required) are sent to the daily bins by means of a conveying system for bagging or to external bins where the oxide is handled in bulk form.
With its vast resources, superior expertise, and reliability in serving its customers, Colorobbia Group is an all-around partner for the entire production and marketing process of raw materials and semi-finished products for the ceramic industry.
With the same philosophy, Colorobbia Group supplies all types of batteries (AGM-SLI-EFB end uses) to the main manufacturers of automotive and industrial batteries, managing all grades of lead oxide in conformity with the single characteristics required.
Today Colorobbia Group is rapidly expanding its collaborations, building on its 100-years history an even stronger future.