Natural paints, all information

Natural paints, all information

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Natural paints: what are theecological natural paintsmore suitable for indoors or outdoors. Advice for use and how to prepare a natural DIY paint.

When we have to face the arduous task ofpaintthe walls of the house, whatever internal or external, we are faced with a very difficult reality to digest: most of the paints used in construction are toxic. At this point it is possible to bet onnatural paintseven if the choice is very limited.

Natural paints or synthetic paints

With the termpaintrefers to a materialfluidwhich, spread on a surface, creates a thin, resistant and elastic film. When to the paint opaque pigments are added we speak ofpaintingornail varnish.

This is a technical difference, on this page I will refer to the termspaintispaintingas synonyms.

Innatural paint, organic binders are used such as:

  • lime
  • milk
  • egg
  • cooked linseed oil
  • walnut oil
  • sunflower oil
  • poppy oil
  • other siccative oils
  • Beeswax
  • cellulose
  • vegetable resins
  • copal
    it is vegetable resin of sub-fossil or fossil origin

The vegetable resins used for the production ofnatural paintsthey are very numerous. The first plant resin used to producenatural paintingand thesandracca, extracted from the tree of the species Tetraclinis articulata, a distant relative of the juniper.

Thesynthetic paintsthey mainly use synthetic resins such as:

  • acrylic resins
  • vinyl resins
  • phenolic
  • epoxy
  • polyurethane
  • polyester

The problem ofsynthetic paintsis that they releasevolatile organic compoundsorVOC. Among the synthetic paints we havewater paintsissolvent-based paints. Attention, onewater paintit's not necessarily natural!

Thenatural paints for interiorsthey are as harmless as those for outdoors. The same cannot be said for synthetic paints: solvent-based paints should not be used for internal walls of the House.

It can be useful:how to recover an external wall

Water-based paints and solvent-based paints

Thesolvent-based paintsthey are, in the hierarchy, the most harmful to human health, so their use is absolutely not recommended for interiors.

The solvent-based paints have a negative impact on human health and the environment.

Thesolvent-based paints release volatile organic compounds in the amount of 400 grams per liter while the water paint it releases "only" 100 grams for each liter used. To learn more about the advantages and disadvantages of these two paintings, I invite you to read the page:Water-based or solvent-based enamel.

Natural paints, advantages

In addition to the clear advantages related to the reduced impact on health, the use of a ecological paintingit can have other positive aspects.

Thesynthetic paintsthey create a film that tends to crack, crumble and lift over time. Thenatural paints, on the other hand, they undergo a process of "noble aging" because when applied to the wall they integrate with this material, carrying out a cohesive action. In practice, thenatural paintsthey penetrate the wall and when they age they do not peel or crack, thus giving the opportunity for easier maintenance. Today, between ecological natural paints more widespread is that based on lime which also has a modest anti-mold action.

Lime paint

It is among the bestnatural paints for interiorsand for the outside of the house. Its validity is such that many paint manufacturers continue to offernatural lime-based paints. The advantages of such natural paint are:

  • It is a waterproof, moisture-resistant paint and is recommended for damp rooms.
  • Let the walls breathe, avoid condensation.
  • It has strong fungicidal and bactericidal properties.
  • It has a remarkable durability on the wall.
  • It is easy to maintain.

The lime has a completely dry white color: when applying the product, the product does not cover, it will be necessary to wait for the wall to dry completely. Generally in optimal climatic conditions it takes 24 hours.

For a more compact and opaque color it will be necessary to pass several coats until the desired effect is obtained: do not forget to wait for the previous one to dry.

If the wall has previous coats of paint, they must be completely removed: arm yourself with patience and sandpaper. Before applying the ecological natural paint with lime, moisten the wall.

How to prepare a natural paint

Get the lime at specialized construction stores, based on the squaring, get advice on the choice of quantity. There lime you can buy it in powder or already mixed with water (grassello).

There lime it has a very low cost, for a standard paint bucket, you won't spend more than three euros.

How to prepare natural lime-based paints

Alla lime, add the following simple ingredients:

  • Natural pigments.
  • The pigments must be diluted in a little water to obtain a smooth yoghurt-like mixture before being mixed with lime.
  • Add water or milk.
  • Add a natural glue: flour glue, rice glue ... egg white is fine too.
  • If we want a more raised effect, add chalk, clay or marble dust.
  • Preparation must strictly take place at least one week before implementation.

Quantities are not easy to report. It all depends on the grnulometry of the lime chosen and the effect you want to achieve.

For example, for pigments, a maximum quantity is generally given: one must never exceed 20% of the weight of the lime. So, if you have 1 kg of lime, you cannot use more than 200 grams of pigments.

As pigments you can use natural earths and oxides that can be found in the most supplied colors. When adding pigments, do not forget that the color, once dry, will lose 50% of its intensity.

How to store DIY natural paints

Should there be any leftover painting just cover it with water and seal it hermetically. This way it can be stored for years.

For the outdoors or for interiors marked by time and humidity, we recommend the hydraulic lime while for internal walls in good condition, the slaked air lime.

Natural and ecological wall paints

If you don't like thedo-it-yourselfor you don't want to take risks with dosages, you can buy a base ofnatural lime paintand add the pigments of the shade you prefer.

TOthis Amazon page” you can find both theorganic lime-based paint, and natural dyes with well-stocked color charts.

Natural paints for interiors and exteriors

Do you have doubts that the lime paint may be too bland for the exterior of your home or for painting the garden wall? Or are you worried that the damp walls of your home will soon spoil a natural paint like this?

To reassure you, know that the facades of the Teatro alla Scala in Milan have been painted with natural lime-based paints.

It might also interest you

  • Thermosetting and thermoplastic resins

Video: All my Homemade Pigments and Paints After a Couple of Years Organic, Inorganic, and Synthetic (July 2022).


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