Abstract: An offset printing ink composition is provided which has further improved drying characteristics to satisfy performances required for offset printing, such as anti-blocking properties including primary blocking resistance and secondary blocking resistance, while aiming at compatibility with the environment. The ink composition comprises mainly a coloring agent, a binder resin and a solvent containing a vegetable oil component and is characterized by further containing as a drying characteristic improver at least one member selected from the group consisting of (A) a polymer which is obtained by polymerizing at least one of olefin monomers and diene monomers, and has a solubility parameter of less than 19 (MPa)1/2 and is compatible with the solvent; and (B) a liquid paraffin, wherein the total amount of the improver is 0.1 to 10% by weight in the ink composition.

Abstract: A high-manganese, non-magnetic steel having excellent weldability and machinability and suitable for use in the structural parts of electrical equipment or nuclear fusion equipment consisting essentially of (% by weight):______________________________________ carbon 0.55-0.80 silicon 0.1-1.2 manganese 10.0-14.5 nickel 0.3-3.0 chromium 0.5-3.6 nitrogen 0.01-0.2 ______________________________________balance iron and inevitable impurities. The steel may further contain at least one element of 0.01 to 1.0% of molybdenum, 0.01 to 0.5% of vanadium, 0.01 to 0.5% of niobium, 0.005 to 0.5% of titanium, 0.01 to 1.0% of zirconium, 0.0007 to 0.005% of calcium, 0.01 to 0.15% of sulfur, 0.03 to 0.2% of selenium, 0.03 to 0.2% of lead, and 0.01 to 0.8% of tin.

Abstract: Disclosed herein is a niobium-containing weldable structural steel having good weldability which consists of 0.005-0.04% of C, 0.01-0.50% of Si, 1.20-2.50% of Mn, 0.01-0.07% of Nb, 0.005-0.030% of Ti, 0.005-0.06% of Al and the balance of iron and inevitable impurities whereby [C(%)+1ON(%)] is not greater than 0.10% and Ti(%)/[C(%)+1ON(%)] is from 0.05 to 0.60 in order to restrict the amount of martensite islands in the weld heat affected zone to not greater than 15% in terms of the area fraction.