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Fig. 7. ‘Mode three’ failure. In this case the button fragment (not shown) does not allow the locking slider to slide all
the way to the latched position (compare to Fig. 3) giving the appearance that the buckle is latched when it is not.

Fig. 8. Two release buttons from Honda Accords. The button at right has degraded and fractured, while the one at left
is in better condition.

shavings of known ABS placed in the same solvents. Similarly, when chips taken from release
buttons and from known samples of ABS were burned, they both showed similar flame charac-
teristics (sustained ignition, orange-yellow flames, black sooty smoke). As with the solubility tests,
these characteristics also match with those tabulated for ABS in [3]. The flame and solubility tests,