In preferred embodiments of this invention, an effective binder has a Tg of less than or equal to about 100??? C. In more preferred embodiments, the effective binder has a Tg less than equal to about 50??? C; in most preferred embodiments, equal to less than about 25??? C. Examples of suitable binders include cellulose esters, cellulose ethers, polymers and copolymers of vinyl esters such as vinyl