"The additive can also lead to the formation of polymer species that are preferably soluble in water. [0031] Examples of additives that can be used in the present invention include inorganic substances, e.g., compounds, such as sulfates, e.g., sodium sulfate or sulfuric acid, and carbonates, and organic substances, e.g., compounds, such as alcohols, polyalcohols such as glycerol, sorbitol or mannit" . . . .