Procedure

Choose the wood batch

A pine batch was chosen with no visible signs of having been burned in forest fires.

Selection of samples

The selected samples showed no heartwood in order to use only the sapwood in the treatment and the wood were stored in a room with controlled environmental conditions for dehydration to stabilize the weight.

Marking of samples

The samples were then randomized to be allocated to each treatment and marked with numbering puncture.

Cutting of samples

They were cut into fractions 21.2 × 4.7 × 4.7 cm.

Weighing

The weighing of each sample was carried out immediately before treatment and after treatment to calculate the absorption of the solution and retention of the preservative.

Treatment by immersion

The treatment of the samples was performed according to the manufacturer’s instructions (time,

concentration).

Vacuum treatment

The treatment of the samples was performed according to the manufacturer’s instructions (time,

concentration) at a negative pressure of 0.92 bar.

Fragmentation of the samples

The samples after dehydration in a controlled atmosphere were fragmented using a chisel and hammer to be received in the mill.

milling

The fragmented samples were grinded into particles having the average size of 1 mm2.

The mill was cleaned of particles with compressed air spray and passed softwood (untreated) between the milling of each sample.

Packaging of samples

The samples were packaged and identified immediately after grinding.