the 2 borax treatment has higher strength than controls the wood failure was not different the 5 borax solution deteriorated the bond quality which might be due to the coating effect of the borax that prevented the glue from contacting the wood referring to the samples dried for 60 minutes or more which are in the inactivated or overdried range the effect of 1 borax solution is particularly significant in terms of the csa and astm standards requirement of 80 wood failure the control samples failed while the treated samples easily meet the requirement this example shows the effect of boric acid and borax treatment on the bond quality of douglas fir pseudotsuga menziesii mirb franco and lodgepole pine pinus contorta dougl plywood the one eighth in thick veneers were dried at 180 u00b0 c an aqueous solution of borax and boric acid were applied at 16 grams per square foot at the concentration given the adhesive was phenol formaldehyde glue the following values were obtained with the average of 30 specimens taken from 3 panels using the vacuum pressure soak test __________________________________________________________________________douglas firdrying time control borax 1 boric acid 1 min psi wf psi wf psi wf __________________________________________________________________________30 159 80 220 82 181 8450 159 69 214 85 211 75pinedrying borax boric acidtime control 1 5 1 5 min psi wf psi wf psi wf psi wf psi wf __________________________________________________________________________30 261 52 279 85 224 39 247 88 177 5150 243 63.