Techniques or processes for providing markings on products are disclosed. Methods of treating a thrombotic condition and reducing the time required for reperfusion of an occluded blood vessel are also described, which include parenterally administering to a mammal a therapeutically effective amount of a pharmaceutical composition which includes a plurality of such microcapsules. Non-cohesive particulates which separate from the liquid, and are held against the peripheral side wall by centrigual force during rotation, slump therefrom in the absence of rotation and risk forming a slurry that gets carried to the outflow chamber. 00% by weight of an element belonging to the third period to the seventh period with an atomic number of 11 to 103 and having an electronegativity of 1.