A security article,a method and manufacture of the security article,a method of verifying authenticity of the security article and security paper

摘要

The part of the security thread exposed in the window has a matt non-reflective appearance and closely matches in colour a portion of the surface surrounding the window, whereby when the thread is viewed in reflected light in the visible spectrum the exposed part of the security thread is unobtrusive. The thread 11 may comprise a substrate 20 with a metallic layer 21 covered by a matt pale yellow coating 22, the yellow coating comprising a luminescent material.