THE numerous products obtained from coal-tar are ever increasing in importance, not so much, perhaps, because of the isolation of new substances or new derivatives of the older materials ...

Understanding Coal Tar dyes in Food: Facts and Controversies Food colouring and other additives derived from coal tar have come in for some bad press recently. Hugh Westbrook delves into the ...

As sealcoating contractors begin their season many of them, particularly those accustomed to using refined coal tar sealer, wonder what the season will hold for their favorite product. Already ...

Grace Calvert and Charles Lowe have prepared from coal tar products of a most extraordinary ... These colors stand light and soap, which the originals, safflower colors, do not.