Tagging particles which are easily detected by luminescent response, or magnetic pickup, or both

Small individual conglomerates for tagging of objects desired to be identified, said conglomerates each comprising:

• (a) finely divided inorganic luminescent material means which will provide readily detectable luminescent response upon excitation by ultraviolet radiations;
• (b) finely divided other material means which will provide predetermined indicia of information once such other material means is located;
• (c) small particles of magnetic material means which is reflective both for visible radiations and ultraviolet radiations;
• and
• (d) inorganic binder material means binding together in small conglomerate form said inorganic luminescent material means, said other material means and said reflective magnetic material means, and said binder material means transmissive for ultraviolet radiations and also for the luminescent response of said ultraviolet-excited luminescent material means;
• whereby said conglomerates are recoverable by visual detection or by magnetic pickup or by both visual detection and magnetic pickup with substantially no absorption of radiations due to the inclusion of said magnetic material means in said conglomerates.

In combination, an explosive device and associated tagging means which is readily recoverable either before or after said explosive device is detonated and which, after recovery, provides information about said explosive device, said tagging means comprising small individual conglomerates intimately associated with said explosive device and each comprising:

• (a) finely divided inorganic luminescent material means which will provide readily detectable luminescent response upon excitation by ultraviolet radiations;
• (b) finely divided other material means which will provide predetermined indicia of information about said explosive device once such other material means is located;
• (c) small particles of magnetic material means which is reflective both for visible radiations and ultraviolet radiations;
• and
• (d) binder material means binding together in small conglomerate form said inorganic luminescent material means, said other material means and said reflective magnetic material means, and said binder material means transmissive for ultraviolet radiations and also for the luminescent response of said ultraviolet-excited luminescent material means;
• whereby said conglomerates are recoverable by visual detection or by magnetic pickup or by both visual detection and magnetic pickup with substantially no absorption of radiations due to the inclusion of said magnetic material means in said conglomerates.