A process for producing a substance with a water-soluble packaging. The
process comprises the following steps: a) a water-soluble material is
deformed so as to embody a vessel; b) the vessel 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 and film web are 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 the 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.