Prevention of Wood Colour Change on Jamuju (Podocarpus imbricatus)and Kisampang (Evodia aromatica BL.) with Desinfectant Based Reagents

The aim of this research was to study natural discoloration of jamuju (Podocarpus imbricatus) and kisampang (Evodia aromatica BL.) before and after treatment again of temperature, humidity, and heat. Discoloration prevention conducted chemically by using antiseptic containing benzalkonium klorida (formula C), kresol or asam kresilat (formula D) and methylene bisthyiocyanate (MBT as comparison) either on log that is planed or unplaned and on sawn timber. The MBT efficacy result on jamuju and kisampang sawn timber, and formula C on kisampang timber show that it can prevent blue stain with four weeks protection period. Measurement result for brightness colour of jamuju timber on the planed is about 35,22 (MBT Under the roof-45,22 (C AC) and 10,62 (C outside)-37,14 (K AC) on the unplaned. Whereas, measurement for brightness colour of kisampang timber on the planed is about 45,04 (C AC)-53,42 (K Outside) and 8,24 (MBT Outside)-46,66 (K AC) from standard value 73,5. Measurement result for total colour variation of E* kisampang timber on the planed is about 8,80 (K outside)-22,56 (K Under the roof) and 21,57 (D AC)-40,19 (C Outside) on the unplaned. Whereas E* of jamuju timber on the planed is about 20,49 (MBT Outside)-25,65 (D AC) and 23 (C AC)-41,02 (C Outside) on the unplaned.