A quick venture across the Internet will tell you that coal tar is described as the basis for around half a dozen regularly used food colourings. These include tartrazine, carmoisine red (E122 ...

Robbins also uses a retort, or still, in which, like Moll, he heats coal tar and introduces the vapors from the retort into the chamber by a gradually increasing heat, lets off the water from the ...

"A delay that long will require a second trip to the jobsite, which is something contractors using coal tar sealers are not used to." He says contractors need to make their customers aware of the ...

These colors, for there are many of them, have been prepared from the alkalies of coal tar by Messr3. W. Perkins and A. H. Church, two rising discoverers, and have been called by them nitroso ...