Etude de cas
BS EN ISO 22254Manual toothbrushes. Resistance of tufted portion to deflection
ISO 22254:2005 specifies a test method for determining the resistance of the tufted portion of manual toothbrushes to deflection. This could be used to derive a stiffness - a factor which has been of great concern to consumers and manufacturers.
This International Standard is applicable to toothbrushes having a conventional flat trim design and may not be applicable to toothbrushes with other designs. The results obtained with this International Standard may not correspond to consumer perceptions of the stiffness of toothbrush bristles.