In this study, Mazooge gall flour with high amount of hydrolyzable tannin was used as the
filJer of PF resin. Variable factors in the study were: filler content, assembly time,
temperature and press time.
In order to evaluate the bond quality, the CBR type of BS standard was used. According to this standard, shear strength together with wood failure were measuered. Also independent and interactive effects of variable factors were evaluated.
The results have shown that the increase in filler content reduces bond quality of PF resin and in the studied conditions only 15 percent filler content results in a bond quality meeting BS standard, so higher contents are not recommended. Also, better treatments were those of higher assembly time
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