Auro raw materials guide

Raw materials guide


Produced by the fermentation of starch containing vegetables, e.g. potatoes, followed by distillation.

GermanyThinner, solvents


A white, crystallised powder made from potassium and aluminium sulphate used in the manufacture of vegetable paints.

GermanyAuxiliary agents

Aluminium silicate

Aqueous alumina naturally formed by weathering of rock rich in aluminium or fine, mineral filler with pigment properties produced by technical precipitation.
Europe Mineral fillers

GermanyMineral fillers

Amino soap

Ammonium compounds modified by organic components. Facilitate the integration of binders into water-based products.

Europe Auxiliary agents

Ammonium soap

Raw materials like beeswax, oils and resins are saponified with liquid ammonia in dedicated boilers. It serves as a natural wetting agent in pigments or as binding agent.

    Germany   Auxiliary agents


This protein component can easily be biologically degraded. It is found in shells where it regulates the formation of the calcite shells. It is used as a stabilizing agent.

   Germany   Plant colours

Balsamic turpentine

Balsamic turpentine should not be confused with the petrochemically derived turpentine used as solvent substitute that is also known as ‘white spirit’. Balsamic turpentine is won by water vapour distillation from various species of pine all around the world. Balsamic turpentine is a fluid plant oil with a fresh, slightly resinous scent. It is used in paints and varnishes as thinning agent but also as bath supplement and for medicinal applications.

    Europe,Asia   Essential oils

Beeswax (CERA ALBA)

Pure, unbleached, ductile beeswax from best provenances, controlled low residue level.

    Germany    Waxes


Pure ethereal, yellowish oil from the fruit skin of the Bergamot tree (Citris bergamia), used as scent.

    Europe   Essential oils

Bovine gall

Spray-dried powder. Thanks to its high content in bile acids, lecithins and enzymes, it is recommended as concentrate for local stain removal which is gentle on fibres.

   Germany   Auxiliary agents

Calcareous spar (CALCITE)

Natural appearance of calcium carbonate (like chalk). Available from most finely ground to coarse grain size. Filler for lacquers, wall paints, plaster and adhesives.

   Europe   Mineral fillers

Calcium hydroxide

Slaked lime in powder form. Produced by the baking of chalk followed by hydration. Already used as binder for lime mortar and lime paints in ancient times.

   Germany   Binding agents

Camomile blossom essence

Produced from camomile by alcohol extraction, protects the skin

   Germany   Auxiliary agents


Hard, water-repellent wax obtained from a Brazilian palm tree species. The leaves of these tall palm trees are cut (they constantly grow again), the wax is liquefied by boiling in water, skimmed off the top and cleaned physically (with bleaching earths). Thanks to its particular hardness, this wax enhances the mechanical resistance of all soft waxes.

    South America   Waxes


Valuable, dryable binding agent from ricinus oil, i.e. from the seeds of the subtropical ricinus shrub, a thickly boiled stand oil produced by means of dehydration (elimination of water).

 Asia; Processing: Germany Oils


Thickened juice extract from the heartwood of the Indian Acacia catechu. Catechu is used in brown to black vegetable paints.

  Asia Plant colours

Cellulose (CELLULOSE)

Stabilizing agent and organic cell-fibre filling agent made from wood cellulose by chemical pulping. Serves as simple adhesive in AURO Wallpaper paste and distemper, but also as emulsifier and thickening agent in paints and adhesives for better processing control.

  Europe Auxiliary agents


A water light oil of the Swiss pine with strong but flavoursome odour.

  Europe Essential oils


Natural calcium carbonate from best sites, (e.g. the nearby region ‘Hildesheim Börde’), finely ground and elutriated, therefore high whitening power and grain fineness.

 Germany Mineral fillers


Pigment made from the dye of leaf green. The green dyestuff from plant leaves is used as copper complex in vegetable paints and Easter egg paints.

 Europe Plant colours

Chrome oxide green (CHROMIUM OXIDE GREENS)

Green mineral pigment made from chromium ores. Its production has negative environmental impacts but there is no alternative yet. In contrast to so-called chromium (VI) compounds, it is insoluble and therefore non toxic.

 Germany Mineral Pigments


Sodium or potassium salt of citric acid.

 Germany Auxiliary agents

Citric acid (CITRIC ACID)

Natural fruit acid in citrus fruits with good lime dissolving and water softening effect; made from molasses by means of fermentation.

 Germany Auxiliary agents


Genuine ethereal, yellowish oils from lemons and limes, used as scents.

 Europe, Asia Essential oils

Clay (CLAY)

A mixture of clay, silt and sand that results from the weathering of rocks. It is one of the oldest mineral building materials and has a moisture regulating effect.

 Germany Mineral fillers

Cochineal (COCHINEAL)

Red colorant, carminic acid, produced by scale insects which live on cactuses domiciled on the Canary Isles and in Mexico. It gives vegetable paint pigments a slightly bluish red colour shade. This raw material has a red to violet dyeing effect and is used as food colouring and in Easter egg paints.

  America Plant colours

Coconut oil (kbA)

Coconut oil, also called coconut fat. This vegetable oil is won from the coconut in kbA quality ((‘certified organic’) and saponified with alcaline solutions into coconut oil soap at our own facilities.

 Philippines, the raw material is processed in the Netherlands Soaps

Colophony glycerol ester

Natural resin colophony is modified with the fat glycerine in a boiling process on the basis of a special method. The result is a binder with very good weather resistance and elasticity.

  Europe Binding agents


Dermal tissue formed by almost any green plant on its subterranean and superterranean parts. Only the very thick cork layer of the cork oak (Quercus suber) domiciled in Mediterranean countries is of economic use. It is used in coarsely to finely ground state.

 Europe, Germany Auxiliary agents

Curcuma (CURCUMA)

Plant from the ginger family with an intensive yellow flesh that is used, in fresh or dried state, as spice or colourant.

 Asia Plant colours


One of the most valuable and beautiful vegetable resins on earth. Its name is derived from the Malaysian word for “cat eye”. It is very light-coloured and low in yellowing. Its tree of origin on Sumatra also supplies Meranti wood. The cultivation of dammar resin enables the inhabitants of Sumatra to sustainably use the tropic forest without destroying it. The use of dammar thus actively combats the depletion of tropical forests.

 Asia Resins


Decovery® is a unique, innovative binding agent that is available exclusively for AURO in the present biogenic quality. It is made from plant alcohol esters of pines and castor plants, with a small remainder of fossile monomers. Decovery® is subject to continuous further development. With each step of development the share of fossile components will be reduced until they are completely replaced by biogenic ones.

 Europe Binder

Drying agents

Auxiliaries, metal soaps made from minerals of calcium, zirconium, ferrum or manganese for reducing the drying times of vegetable oils.

 Germany Auxiliary agents

Essential oils

Essential oils are the volatile components of plants, fruits and herbs, won by distillation.

  Essential oils


Ethereal oil with slightly preserving effect made from the leaves of the Australian Eucalyptus tree, produced by water vapour distillation.

 Europe Essential oils

Fatty acids

As sodium or potassium salts, consisting of hydrophobic and hydrophilic parts, these mainly plant-based auxiliary agents are used as dissolving intermediary, e.g. to emulsify oil in water.

  Europe Auxiliary agents

Fatty alcohol sulfate

Fatty alcohol, won mainly from the reaction of coconut oil with sulphor oxide and caustic soda lye; used as raw material in washing agents.

 Europe Auxiliary agents


Polyvalent alcohol, component of all animal and vegetable fats, produced by separation of fatty acids. AURO only uses glycerine of purely vegetable origin.

 Germany Auxiliary agents


Graphite, known from its use in pencils, consists of many very flat layers of graphene. Graphene builds very flat, two-dimensional structures that are formed like honeycombs. These structures produce very big surfaces and give the paints an enormous flexibility and resilience.

 Spain Auxiliary agents


Graphite is a frequently occurring mineral from the mineral class of „elements”. It is one of the naturally occurring manifestations of the chemical element carbon in its pure form. It crystallizes in graphite in hexagonal two-dimensional layers that are also found in pencils. This special property makes it possible to write with pure carbon.

 Europe Auxiliary agents

Hydrogen peroxide (HYDROGEN PEROXIDE)

Due to its strong capability to release oxygen, this compound of hydrogen and oxygen is well-suited as disinfectant.

 Germany Auxiliary agents


Extract produced by fermentation of the Bengal indigo plant. It was already used as dye 4,000 years ago. Serves as blue vegetable paint pigment and is used for natural egg colouring.

 Asia Plant colours

Iron oxide pigments

Extremely finely dispersed, highly transparent pigments with excellent UV protection and good weather resistance which are especially used in stains.

 Europe Mineral Pigments

Jojoba oil

This oil-like plant wax from the seeds of the Jojoba brush is mainly used as protective and caring component in cosmetics and care products.

 North America Oils

Kaolin (KAOLIN)

Natural clay mineral (china clay, an alumina silicate). Filler for wall paints, plaster, lacquers. Base component for chinaware.

  Europe Mineral fillers

Lactic acid (LACTIC ACID)

This acid produced by fermentaion of sugar by means of lactic acid bacteria is effective against limescale on dishes or glasses.

 Germany Auxiliary agents

Lactic casein

Flocculated milk protein made from cow’s milk by acidification after separating the fat. Valuable binder and emulsifier used in paints and adhesives. For this purpose it is pulped with mild alkalines (borax) to form casein paste.

 Germany Auxiliary agents

Larch resin balsam

An ethereal balsam resin produced by drilling into the larch tree trunks. It is colourless, smells of terpene and serves as scent and binder.

 Europe Binding agents


Water vapour distilled oil of the lavender plant domiciled in Mediterranean countries.

  Europe Essential oils

Lecithin (LECITHIN)

Natural phospholipid made from soy beans by hot water extraction which promotes wetting and emulsification.

 Germany Auxiliary agents


Distillate from the ethereal oil of the East Indian tropical grass Andropogon flexuosus.

  Asia Essential oils


Fatty seed oil of the linseed plant, produced by cold and warm pressing followed by gentle desliming and physical discolouring. As thickly boiled stand oil, it is a valuable binder component which provides high elasticity and creep. It comes partly from regional, improved conventional and controlled biological cultivation.

  Germany Oils

Linseed oil fatty acid

Fatty acid produced naturally from linseed oil by the separation of glycerine which helps to wet pigments.

 Germany Fats


Alkaline solution of ammonia in water, used for making special, water-dilutable resin, wax and oil soaps, so-called ammonia soaps.

 Germany  Auxiliary agents


Produced from the heartwood of trees cultivated in plantations, used for dyeing, its colour range covers blue and violet black shades.

 Europe Plant colours


Colorant with a high content in red dye from central Europe, Turkey and Iran which is used as red pigment in colour wash plant paints.

 Asia Plant colours

Mineral pigments

Inorganic pigments like natural earth paints, synthetic iron oxide pigments, e.g. ochre, English red, Persian red, earth black, and selected mineral paints such as ultramarine and chromium green.

 Europe Mineral pigments

Natural gypsum (CALCIUM SULFATE)

Natural gypsum from deposits in the nearby Harz region. Germany.

 Germany Gypsum

Natural rubber milk (RUBBER LATEX)

Chyle produced by cutting through the bark of rubber trees cultivated in South East Asia. The highly concentrated natural dispersion of natural rubber (caoutchouc) in water is mainly used as a binder in adhesives. Contains a little liquid ammonia to prevent flocculation during transport.

 Asia Binding agents


Norbixin is the designation for the colourant won from the Achiote bush. The seeds are finely ground, the resulting versatile red colourant is used for food colouring, in cosmetics, colour wash plant glazes and in Easter egg paints.

  South America  Plant colours


Ethereal oil produced during the manufacture of orange juice. The distilled, highly fragrant components are used in the perfume industry and for aroma therapy. The “terpene lyes” of weaker fragrance are used as solvents in resins and oils.

  America Essential oils

Orange terpene (D-, L-LIMONENE)

Essential oil that is generated as a byproduct of camphor production. The distilled-off, highly fragrant parts are used in the perfume industry and in aromatherapy. The lesser fragrant terpene bases are used as solvents for resins and oils.

 Europe Essential oils

Organic acids

Carbon compounds with slightly acidic properties (as opposed to known mineral acids such as sulphuric acid). In combination with AURO binders based on vegetable resins and oils, organic acids improve the application-related properties of coating materials.

 Germany Auxiliary agents

Palm kernel fat (kbA) (POTASSIUM PALMKERNEATE)

Palm kernel fat is a byproduct of palm oil production. This colourless fat is won in kbA quality (‘certified organic’) from the seeds (fruit cores) of the oil palm.

 Brasil and Ecuador, the raw material is processed in the Netherlands Fats

Pine terpene alcohol (PINUS PALUS TRIS OIL)

High-boiling fractions from the distillation of pine balsam terpene oil following catalytic water addition.

 Europe Thinner, solvents

Plant colour alumina pigment

Coloured pigments for artist and wall paints made on the basis of a dedicated method. The colorants (reseda, madder, indigo, cochineal, leaf green, catechu, logwood, etc.) are extracted with water adding alum. The pigment is then precipitated as alumina coloured lacquer with lyes, filtered and washed. A laborious process which provides harmonically bright colour shades which sometimes take many days to develop.

 Germany/ AURO Plant colours


Mild alkali formerly lixiviated from potash, today produced by the conversion of sodium carbonate with potash soaps. Used for the saponification of vegetable waxes, resins and oils.

 Germany Auxiliary agents


Strong alkali for the saponification of vegetable oils and fats to generate wash active substances. Made from potassium chloride and water by electrolysis.

 Germany Auxiliary agents

Potassium silicate, silicate sol

Finely dispersed solution of silicates, silicic acids in water which is produced by smelting quartz sand and potash. Used as binding agent in paints and to minimize the cloudiness of juices and wines.

 Europe Binding agents

Potassium sorbate

The salt of the sorbic acid that is found, for example, in unripe fruits is used for the stabilization of water-soluble products and food.

 Europe Auxiliary agents

Precipitated silicate (SODIUM SILICATE)

A mineral similar to swelling clay but produced by precipitation. The silicate particles are positioned in sheets. Precipitated silicate has a high binding capacity for calcium and is thus the main ingredient of our softener component.

 Germany Auxiliary agents

Quartz sand (QUARZ)

Crystalline silicic acid, silicium dioxide, one of the most frequent minerals of the earth’s crust. This chemically very hard-wearing material which forms during the weathering process of eruptive rock has a virtually unlimited availability.



Replebin® is an innovative, biogenic binding agent, developed by AURO in a sophisticated research project that lasted over several years. Replebin® consists of plant alcohol ester with organic acids. The innovative binding agent is legally protected and available exclusively from AURO.
The biogenic nature of the binding agent is regularly examined and confirmed by the SGS INSTITUT FRESENIUS.

 Germany Binder


Dye plant (dyer’s weed) for making yellow vegetable paint pigment.

  Europe  Plant colours


Ethereal oil produced from the leaves of real rosemary by water vapour distillation.

  Europe Essential oils

Safflower oil

Drying oil made from the fatty seed oil of the Safflower thistle, thickened by boiling to form a low-yellowing binder component.

 Europe Oils

Salicylic acid (SALICYLIC ACID)

This material is part of many plants and can be extracted, for example, from willow bark. Because of its germ-repelling characteristics it is a good preservative.

 Germany Auxiliary agents


Undenaturated, pure rock salt (sodium chloride) without free flow agents for the prevention of scale deposits in dishwashers.

 Germany Auxiliary agents

Salt cake

This salt for the use in plant paints and washing agents is made from sodium chloride and sulphuric acid.

 Germany  Auxiliary agents

Shellac (SHELLAC)

Resinous substance produced by lac insects (Laccifer lacca) living on trees domiciled in India.
The resin encrustations are removed from the tree branches, filtered hot through cloths and bleached – not chemically but purely physically by AURO.
Elastic binder for quick-drying lacquers

 Asia Binding agents


Mineral fillers based on silicone oxides. Examples for naturally occurring silicates are mica, clay minerals or quartz (silicium dioxide).

 Germany Mineral fillers

Silicic acid (HYDRATED SILICA)

Finely dispersed silicic acids without crystalline (quartz) structure made from quartz sand and lime by flame hydrolysis. Used as matting filler or as filter agent and binder additive in silicic brines.

 Germany Auxiliary agents


Silver, finely dispersed in water, as an auxiliary agent for the preservation of aqueous products.

  Germany  Auxiliary agents


Fats, oils and resins, e.g. from seeds of the coconut palm, sunflower seeds, linseed oil, soybean oil, the crushed seeds of oil palms, the seeds of Brassica napus (turnip rape) or the subtropical ricinus shrubs (ricinus communis), are gently saponified with caustic potash solution, soda lye or ammonia solution in dedicated facilities. Part of the raw materials come from controlled biological cultivatio

 America, Europe; Processing of the soaps: Germany/ AURO 


Mild alkali from special salt deposits (sodium carbonate lakes). Sodium salt of carbonic acid, sodium carbonate which is used in AURO powder products for the pulping of casein.

 Germany Auxiliary agents

Sodium benzoate

Salt of the benzoic acid that is, for example, main constituent of the benzoic resin. The white, crystalline solid material has a stabilizing effect in water-soluble products but is also used in food products.

  Europe Salts

Sodium bicarbonate (SODIUM BICARBONATE)

In chemistry referred to as natrium hydrogen carbonate, used as neutralising agent and retarder in paints.

 Germany Auxiliary agents

Sodium metasilicate (SODIUM METASILICATE)

Alkaline, water-dilutable sodium salt of silicic acid. Has a fat-dissolving effect in dishwashing detergents due to its alkalinity and is also water softening and anticorrosive.

  Germany Salts


An adduct of chlorine-fee bleaching agent hydrogen peroxide to sodium carbonate. Decomposes into sodium carbonate, water and active oxygen at higher temperatures. The latter has a bleaching effect on stains.

 Germany Auxiliary agents

Sodium pyrithione

Organic compounds that contain sulphur and nitrogen. They are used as preserving agents in cleaners, paints, cosmetics, and more.

 Europe Mineral Pigments

Stearic acid

Found in large quantities in fats and oils, produced from these by fat separation. Used for making stereates and as auxiliary in paints.

  Europe  Auxiliary agents

Sugar surfactant (LAURYL GLUCOSIDE)

Wash active substance, made from sugary raw materials by means of conversion with vegetable oils using potash at temperatures below 100 °C.

  Germany Auxiliary agents


A light yellow, fatty oil from sunflower seeds which is used in lacquers, paints and soaps.

  Germany Oils

Surfactants made of rapeseed oil, castor oil

Specifically selected auxiliaries based on vegetable oil, chemically modified, for the in-house production of aqueous, solvent-free oil resin binder for AURO Aqua products.

  Germany Auxiliary agents

Swelling clay (BENTONITE)

Natural mineral (phyllosilicate) with good swelling capacity. Used as thixotropic agent in aqueous and resinous oily products with good swelling capacity and dirt absorption capacity following surface treatment.

  Europe Auxiliary agents

Talcum (TALC)

Natural mineral (phyllosilicate) with good swelling capacity. Used as thixotropic agent in aqueous and resinous oily products with good swelling capacity and dirt absorption capacity following surface treatment.

 Europe Mineral fillers


Organic compounds (a mixture of benzisothiazolinone and methylisothiazolinone) that contain sulphur and nitrogen. They are used as preserving agents in cleaners, paints, cosmetics, and more.

 Europe Auxiliary agents

Titanium dioxide (TITANIUM DIOXIDE)

Highly opaque, non toxic white pigment for paints and lacquers, made from natural minerals (e.g. rutile) by separation of coloured companion substances. Also used as catalytically effective pigments with a special, finely dispersed structure capable of degrading harmful substances.

 Europe, Asia Mineral Pigments

Ultramarine blue

An inorganic pigment whose crystalline structure is similar to that of lazurite. Used as mineral pigment in all blue stains and lacquers.

  Europe Mineral Pigments

Vitriolic iron

Found as mineral in the form of green or white encrustations; technically produced by dissolving iron in sulphuric acid. This raw material is used for wood preservation, plant dyeing and in tanneries.

 Europe Auxiliary agents


Fatty seed oil from the fruit pulp, a very valuable, semi-drying binder for paints.

 Germany Oils

Water (AQUA)

AURO uses the particularly soft, pure water from the nearby Harz mountain region.

 Germany Thinner, solvents

Wheat flour

Pure grain flour, used as thickening agent in paint removers.

 Germany Auxiliary agents

Wheat semolina

The pure semolina is used as filling agent or extender. Contains gluten.

 Germany Auxiliary agents

Wine vinegar

Natural acid made from wine by means of conversion into alcohol and further fermentation to produce vinegar.

 Germany Auxiliary agents

Wood oil

Oil boiled until thick originating from the nut of the Chinese Tung tree; a valuable, easily drying lacquer binder.

 Asia; Binding agent: Germany Oils

Xanthane (XANTHAN GUM)

Highly molecular, natural catabolic product, polysaccharide of (the genetically unmanipulated!) bacterium Xanthomonas campestris. Suitable as thickening agent and binder.

 Germany Auxiliary agents


Aluminium silicate produced from alaun and sodium silicate by precipitation, a particularly environmentally friendly phosphate substitute for softening water.

 Germany Auxiliary agents