Suspension Powder Silver/Grey was originally marketed as Sticky-Side powder. As the name already indicates this powder is meant to be mixed to a suspension used to develop finger marks on the sticky side of tapes.
 
Suspension powder Silver/Grey is an aluminium based powder. The powder should be mixed with a solution containing a detergent like Kodak Photoflo and water. The paint like suspension is applied to the surface using a soft brush.
 
The silver/grey suspension is most effective on the adhesive side of dark and light coloured tapes, labels and other adhesive surfaces.