Which type of surface is best suited for the application of Physical Developer?

The best-suited surface for the application of Physical Developer is a porous surface. Physical Developer is a chemical method used to visualize latent fingerprints, particularly on porous materials such as paper, cardboard, or rough fabrics. These materials can absorb moisture and sweat from the skin, which helps the Physical Developer to react effectively and reveal the latent prints.

Physical Developer works by forming a complex with the residual salts and oils that may be present in the fingerprint. This process is particularly effective on porous surfaces because they retain these substances better than nonporous surfaces, where residues may not adhere as effectively. As a result, on porous materials, the Physical Developer can provide clearer and more defined prints, making it the method of choice for evidence found on such surfaces.