The efficacy of SINESTO B as antistain chemical for use in Portugal has been studied. The studies were done during the years 1987-1988 at several Portuguese sawmills in co-operation with the Instituto dos Produtos Florestais and the APCIM (Associacao Portuguesa de Comercio e Industria de Madeiras). SINESTO B was used in 5% and 8% concentrations. The storage time varied from 10 weeks to 6 months. In the tests, PCP was used as reference chemical as well as some other commercial antistain products. SINESTO B performed well in most of the tests. It was even better than 3% PCP. 8% concentration is recommended.

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