This European Standard specifies a method for simulating the release of nickel from those parts of spectacle frames and sunglasses intended to come into direct and prolonged contact with the skin in order to determine whether they release nickel at a rate greater than 0,5 µg/cm 2 /week. NOTE 1 This European Standard, FprEN 16128, has been prepared in reply to the European Commission's Mandate M/448 addressed to CEN. From the technical point of view, this European Standard provides an unchanged re-publication of the technical requirements that had previously been specified in EN 1811:1998, but restricted in scope to apply only to spectacle frames and sunglasses. NOTE 2 Users of this European Standard may wish to note that, also in reply to the European Commission's Mandate M/448, this European Standard is currently subject to review with the objective of developing a new standardized method to supersede this European Standard when the new method becomes available. NOTE 3 Nickel release testing of products other than spectacle frames and sunglasses is specified in prEN 1811:2009.