This invention relates to the field of optical taggants and more specifically, to materials and methods for tagging {HEAD ~ explosives} and propellants for forensic identification, {TAIL ~ quality control}, and other purposes 
This invention relates to the field of optical taggants and more specifically , to materials and methods for tagging { HEAD ~ explosives } and propellants for forensic identification , { TAIL ~ quality control } , and other purposes
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