Lasure
A lasure is a coating for porous materials (Bois, Béton S…), not film generator (one says also not-film forming). One thus opposes it to the varnished and Peinture S, which contains binders, which create by drying a homogeneous structure through or on treated material.
The advantages of lasures are in particular of:
- to preserve the aspect of material, in particular surface veined of wood;
- to allow a more or less important circulation of moisture;
- not to have an effect of chipping with time…
On the other hand, they can migrate in material, or be washed more easily, according to the components.
The lasures are used to color, to protect against from the various aggressions (parasite S, effects of the Lumière, moisture). They can be made up of all kinds of ingredients. There are some containing fat contents (Huile S), and others use resin S, which while drying, polymerize locally, by creating a kind of “flour”.
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