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V Tungovo ali kitajsko olje pridobivajo iz semen plodov tungovca, ki raste na kitajskem že stoletja. Olje ima izredno cenjene sušilne, polimerizacijske in odpornostne lastnosti zaradi visoke reaktivnosti sistema konjugiranih vezi a-eleostearinske maščobne kisline. Olje se na tržišču se nahaja v čisti, modificirani in polimerizirani obliki. Nanašanje olje je enostavno, filmi, ki jih tvori pa imajo odlične odpornost proti vlagi, acetonu, etanolu in alkalijam, zato lahko olje uporabljamo v najrazličnejše namene površinske obdelave ter zaščite lesa. Utrjeno olje je nestrupeno ter tako tudi primerno za uporabo na izdelkih, ki so v stiku s živili. Tung oil is obtained from the kernels of the fruit of the tung tree which has been grown in China for centuries. The oil has valuable drying and polymerization properties because of the high content of ?- eleostearic acid. There are three types of tung oil: pure tung oil modified tung oil and polymerized tung oil. Oil is easy to apply and the coating has superior resistances against water, alcohol, acid and weathering. Therefore it has found a lot of applications in wood protection. Dried oil is non toxic and therefore it is very suitable for protection of woody products which are coming in contact with food.

Teak (Tectona grandis L.) belongs to most precious and desired wood species. Because of reduced supply of teak wood from natural forests in Southeast Asia,mainly the plantation wood from different tropical regions is available on the market. We present the properties of nature grown teak wood compared tothose of wood from the plantations. Teak wood from natural forests generallycontains a greater portion of coloured heartwood containing hydrophobic caoutchouc and high content of biologically active extractives like lapachol, deoxylapachol, 2 methylanthraquinone (tectoquinone) and 2-hydroxymethylanthraquinone. The heartwood of teak is distinguished by its decorative appearance, high natural durability and dimensional stability. Trees from plantations are usually fast grown, have smaller stems and high proportion of sapwood and juvenile wood. Heartwood-formation can be less intensive which leads to reduced natural durability. The wood from plantations is not necessarily of lower quality, but it is likely more variable than the wood form natural sites.