Although tar-acid resins comprise the bulk of the German output, considerable gains are shown for other types, notably injection molding resins of the polystyrene and vinyl types. The development of completely automatic injection molding machinery has given an impetus to these types. While technical progress, including improvement of molding equipment, has contributed to the expanded production, the use of synthetic resins in Germany has had a strong stimulus because they are made almost wholly of domestic materials. Under the “Four-Year Plan” for the greatest possible national economic independence, synthetic resins are replacing imported materials, such as the heavier nonferrous metals, iron, hardwoods, cork, and natural gums and resins in many uses. This displacement of materials has also affected such domestic products as glass and porcelain, which caused the Government to intervene and impose restrictions upon the use of resins for purposes adequately served by other materials of German origin. Germany’s expanding production of synthetic resin has also been aided by a sharp increase in exports, which have increased well over 100 percent since 1932. _Tar-acid resins._—German output of tar-acid resins has been estimated at 35 million pounds in 1934, at 49 million pounds in 1935, and at 63 million pounds in 1936. Such resins comprise the bulk of the German production of molding resins. There are at least seven producers of tar-acid resins in Germany and nine producers of molding powders and pellets. Tar-acid resins for surface coatings are produced by a number of these concerns. Among the important makers in Germany are The Bakelite Gesellschaft (organized in 1910 to operate under the Baekeland patents); the explosives and munitions firm of Dynamit A.G.; Dr. Kurt Albert G.m.b.H.; the I.G. Farbenindustrie; Beckacite Kunstharzfabrik G.m.b.H.; and Rohm & Haas A.G. The Beckacite firm has associates in the United States and in the United Kingdom, and Rohm & Haas, an associate in the United States. _Alkyd resins._—The manufacture of alkyd resins has developed in Germany in the past few years. Demand for these resins has been given a marked impetus by the development of a new standardized substitute for linseed-oil varnish known as El Varnish, the use of which is required by the Control Board for Industrial Fats for certain interior and exterior painting. There are five makers of resins for paints, varnishes, and lacquers. The output of alkyd resins has increased sharply since 1934, probably reaching 10 million pounds in 1936. _Urea resins._—The output of urea resins in Germany is relatively small; two of the more important types are known as Locron and Pollopas.