Infrared Reflectography (IRR) is one of the most powerful scientific tools in fine art authentication. By penetrating upper paint layers and revealing carbon-based underdrawings, compositional changes, pentimenti, and concealed alterations, IRR exposes the hidden structure of a painting—information invisible to the naked eye.
Because forgers rarely replicate accurate underdrawings or fail to mimic historical processes, IRR is essential for detecting modern fabrications and confirming genuine artistic method.
DJR Expert Guide Series, Vol. 209 — The Role of Infrared Reflectography: Revealing Underdrawings & Alterations in Paintings gives collectors, appraisers, and conservators a complete professional framework for interpreting IRR results. This guide explains pigment behavior under IR, underdrawing characteristics across historical eras, how IRR reveals restorations, and how to integrate IRR findings with UV, XRF, and microscopy for a full forensic evaluation.
Inside, you’ll learn how experts:
Identify carbon-based underdrawings consistent with period-correct techniques
Detect alterations, overpainting, and hidden restorations beneath surface paint
Recognize pentimenti that strongly support originality
Compare IRR findings with known artist habits and historical studio practices
Distinguish authentic sketch lines from mechanical or modern tracing
Detect transplanted signatures, overwritten signatures, and modern additions
Understand pigment transparency and why certain materials reveal hidden layers
Combine IRR with UV, XRF, microscopy, and raking light for multi-method analysis
Identify reused canvases, lining inconsistencies, and structural modifications
Know when IRR is insufficient and additional testing is required
Volume 209 gives collectors and professionals a museum-grade system for using Infrared Reflectography—revealing truth beneath the paint surface and strengthening authentication accuracy.
Digital Download — PDF • 8 Pages • Instant Access
Infrared Reflectography (IRR) is one of the most powerful scientific tools in fine art authentication. By penetrating upper paint layers and revealing carbon-based underdrawings, compositional changes, pentimenti, and concealed alterations, IRR exposes the hidden structure of a painting—information invisible to the naked eye.
Because forgers rarely replicate accurate underdrawings or fail to mimic historical processes, IRR is essential for detecting modern fabrications and confirming genuine artistic method.
DJR Expert Guide Series, Vol. 209 — The Role of Infrared Reflectography: Revealing Underdrawings & Alterations in Paintings gives collectors, appraisers, and conservators a complete professional framework for interpreting IRR results. This guide explains pigment behavior under IR, underdrawing characteristics across historical eras, how IRR reveals restorations, and how to integrate IRR findings with UV, XRF, and microscopy for a full forensic evaluation.
Inside, you’ll learn how experts:
Identify carbon-based underdrawings consistent with period-correct techniques
Detect alterations, overpainting, and hidden restorations beneath surface paint
Recognize pentimenti that strongly support originality
Compare IRR findings with known artist habits and historical studio practices
Distinguish authentic sketch lines from mechanical or modern tracing
Detect transplanted signatures, overwritten signatures, and modern additions
Understand pigment transparency and why certain materials reveal hidden layers
Combine IRR with UV, XRF, microscopy, and raking light for multi-method analysis
Identify reused canvases, lining inconsistencies, and structural modifications
Know when IRR is insufficient and additional testing is required
Volume 209 gives collectors and professionals a museum-grade system for using Infrared Reflectography—revealing truth beneath the paint surface and strengthening authentication accuracy.
Digital Download — PDF • 8 Pages • Instant Access
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