CMYK is a color model in which all co â¦ lors are described as a mixture of these four process colors. CMYK is the standard color model used in offset printing for fullcolor documents. If we print cyan, magenta and yellow inks on white paper, they absorb the light shining on the page.his process uses the colors cya â¦ n, magenta, yellow, and black or CMYK. Most of the entire of spectrum of colors are produced with just the four process in colors. So it is called four color printing because of the use of CMYK.
Pine tar ointment's use to treat wounds dates back centuries. The use of pine tar ointment as an antibacterial to treat wounds dates back centuries. There is nominal evidence that ancient civilizations of the Near East and Sumeria used pine oils and ointments to cleanse wounds and prevent gangrene.
In either case the tar is a by-product of the operation. Coal tar, a thick, black, oily liquid of sp. gr. I.1 to 1.2 5, is obtained with ammoniacal liquor when the volatile products of the carbonization of coal are cooled.On settling, the distillate separates into two layers, and the aqueous ammoniacal liquor is drawn off from above the tar.hese variations from normal tar are due to the fact that many of the products of distillation are removed from the reaction chamber before the coal has reached its final high temperature. Vertical retort tar, therefore, has some of thv characteristics of low-temperature tar (see TARS, LOW-TEMPERATURE).