Method of wood preservation using expiration control
A method to preserve packed wood by expiration controlling consists of following steps: to clean/smooth surface of packed wood by a cleaner/by sanding said wood surface; to dry moisture of clean packed wood by heating in a high temperature oven; to assemble/manufacture a packed wood according to designed/required shape; to immunize wood preservatives by dipping in pool contains preservation liquid in certain dosage; to dry by draining the preservatives of packed wood that dipped in said preservation liquid pool; and to put security symbols on packed wood before shipping/distribution.
1. A method for preserving wood by immunization of the wood against pests, the method comprising the following steps:
(i) drying the wood by heating in a high temperature oven;
(ii) cleaning and smoothing the surface of the wood by a using a cleaner and by sanding said wood surface;
(iii) assembling the wood;
(iv) immunizing the wood using preservatives, using a mixture comprising copper compounds, sodium dichromate acetic acid, citric acid, tobacco and clove compounds, and Cypermethrin;
(v) further drying the wood; and
(vi) marking the wood with security symbols before shipping or distribution.
2. The method of claim 1 wherein the wood is dried to a temperature of between 65° C. to 120° C.
3. The method of claim 1 wherein the duration of drying is from 3 days to 7 days.
4. The method of claim 1 wherein the immunization step is carried out by dipping the wood into a pool containing preservation liquid in certain dosage.
5. The method of claim 1 wherein the immunization step is carried out by spraying, dyeing, brushing, submerging, using vacuum pressure, or pressure impregnation using a preservation liquid.
6. The method of claim 1 wherein the wood is assembled into a pallet.
7. The method of claim 6 wherein the wood is marked with a numeric sequence.
8. The method of claim 1 wherein the immunization step comprises contacting the wood with a disinfectant mixture comprising a mixture of copper compounds and sodium dichromate dissolved in water, acetic acid, citric acid, tobacco and clove compounds, and Cypermethrin.
9. The method of claim 8 wherein the disinfectant mixture contains preservatives that become harmless to living things after less than 30 days.
10. The method of claim 9 wherein the living things are rats.