Microemulsion Water Based treatments are usually applied using low pressure (double vacuum) treatment plants and the end product can be suitable for Use Class 1, 2 & 3 depending on the specifics of the process used.
Low pressure treatment plants generally uses only vacuum and atmospheric pressure and a water based biocide treatment which helps to protect it against fungi and wood destroying insects.
However, these Use Classes can also be obtained by dipping in a dipping tank, or by aspersion in a treatment cabin.
Dip treatment is a common method of applying preservative to timber in bulk. Dipping treatment is exactly as it sounds – the wood panel is dipped into a treatment bath and fully submerged. Dip tanks can contain water-based or solvent-based preservative.
Treating wood through dipping treatment helps to protect the timber from rot and insect attacks. This process is quicker and less expensive to carry out making it a popular method in the timber treatment industry.
Flow treatment can be used where regulation does not allow storage of a large quantity of treatment chemical. A flow treatment cabin uses also a water based treatment chemical, which is pumped on the timber by a high flow pump and aspersion ramp. Unabsorbed treatment chemical is recycled upon its return in the central collection tank, lowering storage volume needs.
Please see table below of how Use Classes are defined: –