TRADITIONAL RECIPE

PAINTING WITH OCHRE Pigment. In the past the We speak about an ecological only pigments available paint with a predominant use on were ochres and other wood coating. The base is natural earth colours. linseed oil, flour and ochre Nowadays we have a wide pigment (1). Any amateur may range of synthetic be able to make and apply this pigments. We have named “ochre” to all the natural paint; with it, we will achieve colouring earths which main “Antique” effect finishes. composition is iron oxide. As there are yellow, red and This painting has been used for black iron oxides as well as over a century in many European a combination of them countries, but was firstly employed (orange and brown), ochres in Scandinavia, In the Swedish city could be all of them of Falu, the Falu Rödfärg factory although they are mainly still exists after producing for more associated to yellow than 300 years this paint shades. exclusively. They use red natural Flour. Usually from wheat ochre from the old copper mine or rye. This component located in the city. acts as thickener to give

body to the paint. PREPARATION OF A PAINT Iron sulphate, also called WITH OCHRE. ferrous sulphate and vitriol. This product has a The raw material needed is as protective effect against follow: bacteria on wood as well as on coatings, but has also a beneficial effect as Water. It acts as solvent. it improves the fixation of Linseed oil. It acts as the pigment on the wood binder. We have to boil it cellulose fibres. This in order to avoid the paint product exists in nature The become sticky. although nowadays it is refined linseed oil does not obtained synthetically as a completely dry in air, we sub-product of white should add some metallic titanium dioxide pigment salts that will act as driers. with the process called “via

______

Pigmentos en polvo Easycolor® ,para pinturas, cementos, cales, bellas artes, etc. Fabricados por G&C Colors, S.A.

Recetario tradicional uso Easycolor. Pintura al ocre. Mayo 2012 V.0 Página 1 de 3 sulphate”. We can find this 3. Cook stirring every 10 or product in gardening and 15 minutes. agricultural fertilizers 4. Pour the ferrous sulphate stores as it is used as pH and the pigment. Keep corrector for the soil and boiling and stirring biocide. another 10 or 15 minutes. Linseed oil. It acts as a It does not matter if the binder. We will choose, if possible, the cooked one ferrous sulphate is lumpy but the refined version as it is soluble in water. could be also used as the 5. Add the linseed oil and preparation of this paint is continue stirring the mix cooked. another 10 or 15 minutes. 6. Add the Marseille soap. Marseille soap. It acts as Turn off heat and keep humectant providing an stirring to homogenize, 1 improvement in the to 3 minutes will be emulsion of linseed oil in enough. water and in the 7. Let it cool down. Our dispersion of the pigment. paint is ready. We do not We will use it preferably need to filter the paint in liquid or flakes. although beneficial as it will be applied on rustic surfaces. Proportions:

1 part of cooked linseed Application: oil. 8 parts of water. Wood should be naked to 2/3 parts of wheat or rye improve the penetration and flour. good anchorage so we will 2,5 parts of ochre or 1 to remove old paintings mainly if 1,5 parts of synthetic we used varnishes. pigment. ¼ parts of ferrous If needed to dilute we will use sulphate. water. For example, if wood is 1/10 parts of Marseille very absorbent, we can give a soap. first coat diluted on a 20% to enhance the penetration. We will give 24 hours to let it dry before applying a second coat. Preparation:

1. Mix the flour with a (1) We can define liquid paints differently but among the portion of the total water definitions we can say it is a amount to guarantee the coating that once applied absence of lumps. hardens and keeps well bonded 2. Pour in a recipient with to the support, a coat that is the rest of water and boil.

______

Pigmentos en polvo Easycolor® ,para pinturas, cementos, cales, bellas artes, etc. Fabricados por G&C Colors, S.A.

Recetario tradicional uso Easycolor. Pintura al ocre. Mayo 2012 V.0 Página 2 de 3 opaque and that protects and and adhesive element to the decorates. support and bonder The essential components of between all the components any liquid paints are: of the painting.

Binder. Solvent. Solvents allow the Pigments. dispersion of pigments and elements and facilitate the A diversity of additives are spread on thin layers. Those used today to improve the solvents could be aqueous production and properties. and organic. Paints using We can talk about water as solvent are called dispersants and wetters to water-based and those facilitate the using volatile organic homogenization of solids in compounds (VOC) are liquids, defoamers, called solvent-base. The rheological agents (they solvent evaporation and the modify the viscosity polymerization of the binder properties), coalescers that enable the formation of a modify the minimum dry film. temperature of film Finally, pigments aim is to formation, preservatives, provide colour and opacity dryers that promote the although sometimes as polymerization of the solar radiation protection binder. too.

Binders are resins that polymerize under certain conditions becoming solid

______

Pigmentos en polvo Easycolor® ,para pinturas, cementos, cales, bellas artes, etc. Fabricados por G&C Colors, S.A.

Recetario tradicional uso Easycolor. Pintura al ocre. Mayo 2012 V.0 Página 3 de 3