Lactone adducts
Light absorbing dyes for photographic elements
Light-sensitive water soluble compounds
Lignin and method of production
Lignin compound production
Lignin compounds and method for making same
Lignin derivative
Lignin derivative
Lignin derivative manufacture
Lignin derivatives
Lignin dispersing agents and a method of making the same
Lignin dispersing agents and method of making same
Lignin dispersion
Lignin having sulfur and phosphorus groups
Lignin making process
Lignin solvents
Lignin sulphonic acid hydrogenation
Ligninsulphinic acid
Ligninsulphonic waste acid
Lignite products and compositions thereof