Abstract: A process for producing a cosmetic-impregnated sheet which comprises applying and infiltrating a cosmetic base to and into a base sheet having on the surface thereof a retentive sheet capable of absorbing and retaining the cosmetic base at a shear rate of 102 to 106 s?1, the cosmetic base being applied to and infiltrated into the retentive sheet of the base sheet, and the cosmetic base, when subjected to a steady shear deformation at a shear rate of 2 s?1 for 100 seconds followed by a steady shear deformation at a stepwise increased shear rate of 20 s?1, showing no shear stress growth or showing such a shear stress growth that the difference between the peak shear stress B at a shear rate of 20 s?1 and the equilibrium shear stress A at the same shear rate, B?A, is 20% or smaller of the equilibrium shear stress A in the transition between the two shear rates.

Abstract: A magnetic recording tape having improved durability and capable of conducting recording and reproduction of data with high reliability, and a method for manufacturing the same are provided. The magnetic recording tape comprises a substrate having a thickness equal to or less than 7 &mgr;m and at least one magnetic layer provided on one surface of the substrate, and the magnetic recording tape has a longitudinal creep deformation ratio in a range of less than 0.04% when the magnetic recording tape is subjected to a longitudinal tensile stress of 19.1 MPa for 25 minutes at 50° C.

Abstract: A magnetic recording medium comprising a substrate having thereon at least a magnetic layer and a lubricant layer and a process for producing the same are disclosed, in which the lubricant layer is an uppermost layer and comprises a perfluoropolyether lubricant having a number average molecular weight of 800 to 30,000 and represented by formula (I):CF.sub.3 O--(CF.sub.2 O).sub.m --(CF.sub.2 CF.sub.2 O).sub.n --CF.sub.3(I)wherein m represents an integer of 2 or greater; n represents an integer of 1 or greater; and 7>m/n>2.

Abstract: A fluorine-containing lubricant having a linear structure devoid of polar groups at the terminals of its molecule, and has at least two polar groups on the intermediate carbon chain of the molecule is disclosed. A magnetic recording medium employing the lubricant is also disclosed.

Abstract: A polyurethane is prepared with use of a catalyst comprising a compound having the formula: ##STR1## in which n is an integer of 2 to 12, A is a hydrogen or a group of --CH.sub.2 CHRCH.sub.2 NH.sub.2 and R is hdyrogen or methyl, provided that n is 6 when A is hydrogen. The compound scarcely smells and does not elute out of the polyurethane article. The process is easy to control.