Properties such as relative humidity (T 402sp-03), brightness and yellowness (T-452 om-02), whiteness (T-560 pm-96), opacity and absorption coefficient (T-425 om-01), tensile, breaking length and stiffness (T-494 om-01), burst index (T-403 om-02) and tear index (T-414 om-04) are the parameters of interest.
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