Dry cleaning is called this way because there is no water used in the process. In the past, it involved the use of a chemical called Perchloroethylene, also commonly known as PERC or PCE. This chemical stopped being used over 10 years ago due to its potential toxicity.
As a company that wasn't around in the era of Perchloroethylene, we have never processed any garments using this chemical. Instead, our facilities use a liquid silicone as the main solvent during the dry cleaning process. It's a really light solvent that is chemically inert, is not petroleum-based and is the modern-era standard for dry cleaning products.
Nonetheless, approximately only 15% of the garments sent to us for dry cleaning require the use of this solvent. You will be able to tell by the notes on your garment care tag - used for reference when we consider our cleaning process - whether an item is dry cleaned or laundered and pressed.