A technical photography study can reveal a surprising amount of information from a serigraph print, with each imaging technique adding a new layer of insight.
Raking Light (RAK) – Highlights embossing and shows the presence and distribution of a thick ink layer.
Reflected Ultraviolet (UVR) – Makes visible this otherwise invisible thick underlying layer of ink.
Ultraviolet Fluorescence (UVF) – Reveals the presence of the same thick ink layer and shows a strong orange fluorescence, useful for the pigment identification.
Infrared (IR) – Discloses a hidden pencil sketch beneath the inks.
Infrared Transmitted (IRT) – Maps the thick underlying ink, clarifying its extent and distribution.