Stains for wood are used to color and ennoble wood. It determines and highlights the peculiar characteristics of wood such as pore, grain, fiber, and tone.
The wood staining process is therefore used for:
- Change the colour of the essence according to the customer’s needs
- Reduce surface defects in wood
- Get valuable effects by even using cheaper woods
- Uniform the colour on products made of different woods
Stains are solutions of dyes or dispersions of organic and inorganic pigments in water or solvent. The proportions of the additional components such as additives and resins are dictated by the type of wood, type of manufactured, type of application. Stains can be divided into categories such as spray stains, wiping stains, spray and wipe stains, roller stains and dipping stains.
Types of application of wood stains
Spray stains are applied by spray guns or mixed air or airless guns. This type of application is quick and easy to automate.
Roller stains are applied with special machines that apply the stains on the surface through rollers.
Stains initially are applied by spraying or brushing abundantly on the surface, and then the excess stain is removed using a sponge or a rag. This stain has been developed to be applied directly on assembled furniture, where is required a good uniformity.
DIPPING & FLOW COATING
Dipping stains are used in tanks where the product is stained for complete immersion for a few seconds in the stains. Flow coating is an automated method of applying industrial liquid coatings such as stains. It involves directing numerous individual streams of coating over one or multiple parts that move horizontally on a conveyor. Flow coating can be used to cover multi-dimensional surfaces of a variety of shapes.