Dry cleaning of garments with perchloroethylene or petroleum solvents avoids saturating the fabric with water. While the clothes are immersed, the solvent does not penetrate the fibres of the fabric, thereby avoiding the possible swelling and shrinking that can occur with water saturation.
The garments are inspected and pre-spotted for stains and heavy soiling by a trained “spotter”. After pre-spotting they are sorted by types of fabric, colour and weight and then machine-cleaned in solvent containing detergent.
The solvent is removed from the garments by draining, spinning and tumble dying with hot air. The recovered solvent is filtered and purified for reuse by a distillation process.