- i.design Mortars Paints Socli
Natural and artificial pigments
- Crushed (sometimes burned) pigments in powder form, they are applied to mortars, concretes, marmorinos and other lime or cement-based products to colour them.There are many natural or synthetic pigments. These are a selection of common pigments used in decoration or building works.
Pack type 25 kg Bag, 10 kg, 20 kg, 1 L, 8 L
Pallet 1-L & 8-L pots / 10-kg, 20-kg & 25-kg bags
Fields of application
Paint, patina, marmorino and lime render colouration.
All pigments have a significant covering power thanks to their extreme thinness. Their colouring powers and their properties may change.
Earths and Ochres are in their natural form, mixed with topsoil and sand. They come from the natural oxidation reactions of various metal elements (e.g. iron). The artificial pigments are from industrial production, from metallic elements such as iron and copper.
Each pigment has its own absorption coefficient of solar radiation.
Light colours absorb less sunlight than dark colours.
In general, it is forbidden to exceed 3% of the pigment weight in comparison to the weight of lime in the production of a render.
Similarly, the pigments are subjected to a saturation limit in the production of lime wash and lime paints. We are talking about "limit of saturation". This limit changes according to the nature of the pigment used and according to the works. It is essential to respect it.
This is the maximum allowed for artificial pigments (expressed as a percentage in comparison to the weight of the lime in powder form):
For natural pigments:
- Limewash (25%)
- Patina (65%)
- Sample preparation on each of substrate is strongly advised before applying a coating, paint or lime washbecause the colours lose their brightness as they dry. It is possible to get an idea of the final colour by accelerating drying with a hair dryer on a test sample
- An initial idea of the final colour of a coating can be obtained by mixing dry pigments (ochres and earthsonly), lime and sand
- To prevent colour problems, it is advisable to prepare the amount required for a complete wall surface at one time.
- Do not store pigments in a wet place
- Do not exceed the recommended amount