Color Transparency Physics: A New Domain of Strong Interactions

The concept of color transparency is introduced. This new feature of QCD is characteristic of a gauge theory. It enables strong interactions to be studied in a new domain: scattering amplitudes of transversally small color singlet objects. Experimental data are still few and somehow inconclusive. Future prospects are briefly discussed. This is a frontier problem of QCD which deserves much attention from both theorists and experimentalists in the coming years.