รอยนิ้วมือ powders can be categorized into four classes: regular, luminescent, metallic and thermoplastic [5]. In general, powdering method works based on the mechanical adherence of รอยนิ้วมือ powder to the moisture and oil components of the skin ridge deposit on substrates The powder's relative surface area, shape, particle size and charge are factors that could affect the adhesion between the powder and the moisture and oil components of the รอยนิ้วมือ. Two essential elements that most commercial powders rely on to provide adhesion to รอยนิ้วมือ residue are pigment and binder. Pigment in the รอยนิ้วมือ powder provides contrast between รอยนิ้วมือ and substrates whereas binder offers maximum and preferential adhesion to รอยนิ้วมือ residue.
Some pigment powders provide enough adhesion to be used individually. An ideal รอยนิ้วมือ development powder should provide color with acute contrasting, good adherence properties and desirable sensitivity. Therefore, a good รอยนิ้วมือ powder can adhere to the รอยนิ้วมือ residue which consists of moisture and oil components. Besides, it can provide good contrast between the รอยนิ้วมือ and substrates, and the powder should not be attracted strongly to the surface
so that the excessive powder deposited on skin furrows can easily be brushed off. Generally, the powder size for รอยนิ้วมือ development is in the range of 1–50 μm.