Abstract: A one-piece toothbrush or other cleaning implement formed of plastics material by injection moulding comprises an elongated handle 10, a head 11 at one end of the handle and a group of at least thirty resiliently flexible bristles 12 of a small diameter extending from the head generally axially of the handle, the bristles 12 in the group being laterally spaced apart from each other.

Abstract: A process for the treatment of a liquid reactive medium with a gas comprising dispersing the gas in a liquid in which the gas is sparingly soluble to form a dispersion thereof, said liquid being maintained at a pressure (P1) greater than the pressure (P2) of the liquid reactive medium and the amount of said gas dispersed therein being in excess of its saturation point in the liquid; and introducing the dispersion into the liquid reactive medium having a demand for the gas which is in excess of the amount of gas capable of being dissolved therein at the prevailing conditions in the treatment zone.

Abstract: A transparent backing sheet (36) with a cover sheet (50) secured thereto by a layer (46) of pressure sensitive adhesive is cut to size. The center portion (56) of the cover sheet (50) is cut, without cutting through the backing sheet (36), and peeled away, leaving a frame-like cover (58). The back page (26) of a three-page form (20) is secured to the exposed adhesive (46). A corner (b 60) of the cover (58) is severed from the main portion of the cover (58) without cutting through the backing sheet (36). The cover (58) is peeled off the backing sheet (36) by grasping the corner (60) with one hand and the main portion of the cover (58) with the other hand. The exposed marginal area of adhesive (46) is pressed against the inner surface of the automobile window (16, 72) to secure the backing sheet (36) to the window (16, 72) around the entire periphery of the backing sheet (36). The backing sheet (36) holds the form (20) flush against the window (16, 72).