Any of various techniques for producing an image or graphical representation based on properties of reflection; specifically a technique for revealing hidden drawing lines beneath paintings using infrared scanning.

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Connections NYT: Hints For Today's Puzzle, Tue, Jan 13

NYT Strands Today - Hints, Spangram & Answers for January 13

Today’s Wordle Answer Jan 13 #1669- NYT Wordle Hints & Updates

Today's NYT Pips Hints & Answers

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NYT Mini Crossword Answers Today - The Mini for Jan 13 Solved