The bally flex test can be carried out with wet or dry test specimens at ambient.

1.1 Twiddle the back button of the machine,and adjust the upper jig to the horizontal position.

1.2 Fold up the specimen from the middle in the length direction, making the testing side inwards and the edge aligned, as fig.5 shows.

1.3 Fixed the upper jig and lower jig and Loosen the screw, then put one end of the specimen into the upper jig to make the folding line flush with the bottom line of the upper jig. Then lock the set screws when the specimen reaches the set crews of the upper jig.

1.4 Fold down the other end of the specimen, cover the folding ling and keep vertical, as FIG 6 shows.

(just straight the specimen, and don't have to exert a greater force)

1.6 After Clamping the specimen, turn the back knob to adjust the upper jig to the maximum bending angle, and the bending angle should be 22.5±0.5.

2. Wet test

2.1 Turn up the reverse side(not used for testing) of the specimen on the table, draw distilled water to the reverse side with the straw and then roll on it with glass rod to make water infiltrate the specimen edge within 5mm. And the absorption lasts about 1-2 minutes.

1. In case of looseness while bally test, confirm whether the set screws are locked after fixing the specimen.

2. Don't lock the screws too tight when clamping the specimen, so as to avoid damaging the specimen while bending.