Disclosed are methods for producing a substance with a water-soluble
packaging. Said methods comprise the following steps: a) a water-soluble
material is deformed so as to embody a container; b) said container is
filled with a filling material selected among the group comprising
detergents, cosmetics, pharmaceuticals, body care products, auxiliary
agricultural agents, adhesives, surface-treating agents, construction
materials, dyes or food items; c) a water-soluble film web is applied to
the filled container; d) the filled container is sealed; and e) the
sealed and filled container is finished. The inventive methods are
characterized in that a negative pressure is generated in the filled
container in the course of the process. In order to generate said
negative pressure, the air located between the filling material and the
water-soluble film web applied in step c) escapes at least in part
through openings in the water-soluble film web applied in step c). The
inventive methods make it possible to produce compact dosing units that
have a reduced volume while being provided with improved optical and
haptic properties.