| http://www.w3.org/ns/prov#value | - The photographic silver halide emulsions to which the new cyanine dyes are added, as well as the other layers of a photographic material which is prepared using these emulsions may be hardened by the addition of the usual hardeners such as aldehyde hardeners, e.g. formaldehyde or mucochloric acid, or hardeners which are free from aldehyde groups such as trisacyloyl hexahydrotriazine.
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