Abstract: A multi-layer film includes a structural layer of water-soluble film, and a barrier layer. The barrier layer is affixed to spaced apart discrete areas of the structural layer. The barrier layer has insufficient structural integrity and strength to contain a bag's contents once the structural layer has been dissolved. A bag is formed by overlapping areas of the multi-layer film which do not include the barrier layer, and sealing the overlapping areas to one another.

Abstract: A multi-layer, water-soluble film, a method of producing such film, and a method of packaging a chemical in such film are provided. The multi-layer film comprises a continuous layer of water-soluble material suitable for forming an outer layer of a bag, and a barrier coating affixed to discrete areas of the continuous layer, leaving a plurality of uncoated intervals occurring at repeating distances on the continuous layer. The continuous layer is of sufficient thickness and strength to provide sufficient structural integrity for use as a bag. The barrier coating, suitable for forming the inner surface of a bag, lacks sufficient structural integrity to contain the contents of the bag once the outer layer is substantially dissolved.

Abstract: A method and apparatus is provided for printing on a water soluble film for use in-line on a packaging machine. Typically, the packaging machine will form a web from a roll of water soluble film and transport the film web toward a forming, filling and sealing station where the web is formed into the shape of a container, filled with a substance and sealed to form a water soluble container. A printer in accordance with the present invention can be mounted to the packaging machine for printing on the film web while the packaging machine has temporarily halted transportation of the web. The printer includes a printing head with an engraved face which is applied to the film web by a suitable actuating device. Ink is supplied to the engraved face by pressing the printing head against an ink-absorbent pad. The actuating device includes a mechanism for rotating the printing head 180.degree.