Abstract: A vehicular lamp includes a light source positioned inside a lamp chamber. The lamp chamber is formed from a lamp body fixed to a vehicle body and a front cover that covers a front open portion thereof. The vehicular lamp includes a light guide that includes a side end surface to which light emitted from the light source is incident on one side thereof; a light-emitting surface that emits the light that is incident from the side end surface in a predetermined direction; and a reflective back surface that has a reflecting portion that faces the light-emitting surface. The light guide made from translucent material that is positioned on one side inside the light chamber following along with the shape of the lamp front cover. A plurality of stippling steps that have a generally conical shape are provided on the reflective back surface of the light guide.

Abstract: A vehicular lamp includes a light source positioned inside a lamp chamber. The lamp chamber is formed from a lamp body fixed to a vehicle body and a front cover that covers a front open portion thereof. The vehicular lamp includes a light guide that includes a side end surface to which light emitted from the light source is incident on one side thereof; a light-emitting surface that emits the light that is incident from the side end surface in a predetermined direction; and a reflective back surface that has a reflecting portion that faces the light-emitting surface. The light guide made from translucent material that is positioned on one side inside the light chamber following along with the shape of the lamp front cover. A plurality of stippling steps that have a generally conical shape are provided on the reflective back surface of the light guide.

Abstract: A polishing composition contains abrasive grain such as colloidal silica, acid such as citric acid and orthophosphoric acid, an oxidizing agent such as hydrogen peroxide, a compound selected from a group consisting of azoles and its derivatives such as benzotriazole. The polishing composition is suitably used for polishing a magnetic disk substrate.

Abstract: A polishing composition contains abrasive grain such as colloidal silica, acid such as citric acid and orthophosphoric acid, an oxidizing agent such as hydrogen peroxide, a compound selected from a group consisting of azoles and its derivatives such as benzotriazole. The polishing composition is suitably used for polishing a magnetic disk substrate.

Abstract: A polishing composition includes an abrasive, at least one acid selected from the group consisting of orthophosphoric acid, diphosphoric acid, polyphosphoric acid, metaphosphoric acid, hexametaphosphoric acid, methyl acid phosphate, ethyl acid phosphate, ethyl glycol acid phosphate, isopropyl acid phosphate, phytic acid, and 1-hydroxyethylidene-1,1-diphosphonic acid; at least one salt selected from the group consisting of sodium salts, potassium salts, and lithium salts of an acid selected from orthophosphoric acid, diphosphoric acid, polyphosphoric acid, metaphosphoric acid, hexametaphosphoric acid, methyl acid phosphate, ethyl acid phosphate, ethyl glycol acid phosphate, isopropyl acid phosphate, phytic acid, and 1-hydroxyethylidene-1,1-diphosphonic acid; an oxidizing agent; and water.

Abstract: The present invention relates to integral skin-foam molded articles obtained by reaction-injection molding a polyurethane foam material comprising a polyol component, an isocyanate component, a catalyst, and a blowing agent. Catalysts may be selected from tin and amine compounds. Water has been successfully used as a blowing agent.