Oil paint considered drying, those with an iodine number of 115-130 are semi-drying, and those with an iodine number of less than 115 are non-drying. Linseed oil, the most prevalent vehicle for artists' oil paints, is a drying oil. When exposed to air, oils do not undergo the same evaporative process that water does. Instead, they polymerize into a dry semisolid. This rate of process can be very slow, depending on the oil. The advantage of the slow-drying quality of oil paint is that an artist can develop a painting gradually. Earlier media such as egg tempera dried quickly, which prevented the
Metro Fuel Oil Energy plans to process 100% renewable biodiesel which can be blended with heating oil or diesel fuel. The plant will employ technology that will enable United Metro Energy to capture and utilize waste generated by the process. The plant is scheduled to open in Third Quarter 2012. United Metro Energy was founded in 1942 when Pauline Pullo recognized that home heating oil was a cleaner, more efficient alternative to coal in the heating fuel market. United Metro Energy remained a relatively modest retail operation until, in the late 1970s, when Paul J. and Gene V. Pullo, Pauline’s grandsons, took over