what kind of powder is used for fingerprinting
Fingerprint powder Modern fingerprint powders have a variety of compositions, and are often a matter of personal choice by the expert using them or down to the standard procedure of the department or agency. Many agencies use proprietary powders produced by independent companies, and so the exact formulation of these powders is not revealed.
Fingerprint Since the late nineteenth century, fingerprint identification methods have been used by police agencies around the world to identify suspected criminals as well as the victims of crime. The basis of the traditional fingerprinting technique is simple. The skin on the palmar surface of the hands and feet forms ridges, so-called papillary ridges, in patterns that are unique to each individual and which do not change over time. Even identical twins (who share their DNA) do not have identical fingerprints. The best way to render latent fingerprints visible, so that they can be photographed, can be complex and may depend, for example, on the type of surfaces on which they have been left. It is generally necessary to use a ‘developer’, usually a powder or chemical reagent, to produce a high degree of visual contrast between the ridge patterns and the surface on which a fingerprint has been deposited.
MDMA "Molly", short for 'molecule', was recognized as a slang term for crystalline or powder MDMA in the 2000s.[158][159]
Fidget spinner As of 2017, the patent status of the various fidget spinners on the market was unclear.[8]