ID11+ contains a sequestering agent which D-76 does not have. The sequestering agent keeps the silver in solution so that it will not replate onto the silver halide grains during development. This makes ID11+ somewhat finer grainer and as it reduces "clumping" of the grains. As was stated previously, both use metol and hydroquinone as the developing agents. The Kodak name for metol is "Elon."(posted 8412 days ago)