Method and preparation for the photochromic marking and/or for securing the authenticity of objects
AssigneeNorbert Hampp
InventorsNorbert Hampp, Arne Seitz
Life of this patent
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Abstract
Method and preparation for the photochromic labeling and/or for protecting the authenticity of objects, in which bacteriorhodopsin materials and preparations therefrom are used for application to the objects; preference is given to using a combination of low-level and high-level security features in said bacteriorhodopsin materials and preparations therefrom.
Claims23
A method for protecting the authenticity of an object comprising applying to the object a photochromic ink which protects the authenticity of the object by comprising as a photochromic portion at least one bacteriorhodopsin variant which when illuminated with light of the visible wavelength range undergoes a visually detectable reversible change of state, utilizable as low-level security feature for an authenticity check, and which ink has in addition to the low-level security feature one or more visually undetectable high-level security features detectable only by instrumental analysis, thereby protecting the authenticity of the object.
A method for protecting the authenticity of an object comprising by applying to the object a photochromic ink comprising as a photochromic portion bacteriorhodopsin wild-type which, when illuminated with light of the visible wavelength range, undergoes a visually detectable reversible change of state, utilizable as low-level security feature in an authenticity check, and which ink furthermore comprises an auxiliary substance which binds water or/and reduces the availability of protons.
A photochromic ink, characterized in that it contains at least one bacteriorhodopsin variant.
Dependencies are inferred from the claim text.