Tendency of the preservative use for impregnation industries in Japan
IRG/WP 98-50101-05
K Suzuki
In Japan, since 1997, the acceptable limit of the arsenic in the waste water become to 0,1 mg/l and the additional regional severer restriction can be established. In this reason, Japanese wood preservation industries intend to use other than CCA, like DDAC, ACQ, Tanalith CuAz, copper-naphthate and zinc-naphthenate, as replacing from CCA. In Jan-June 1997, the share of CCA preservatives was less than 30% in contradiction to over 90% in Jan-June 1996.