The emulsifying property of surfactants is also the basis for emulsion polymerization. The separated gums are then dried and manufactured into emulsifying agents such as lecithin. The food industry exploits the gelling, water-retention, emulsifying and other physical properties of these hydrocolloids. The food industry exploits their gelling, water-retention, emulsifying and other physical properties. Polyvinyl alcohol has excellent film forming, emulsifying and adhesive properties. Acetylation prevents gel-formation but increases the stabilising and emulsifying effects of pectin. Common examples include emulsifying wax, polysorbate 20, and ceteareth 20. Sodium citrate can be used as an emulsifying stabilizer when making cheese. In the production process, soapwort may be used as an emulsifying additive. It is used as an emulsifying agent and whipping aid. Waterproofing can be lost by exposure to emulsifying agents due to human pollution. The root's emulsifying property is used for cleaning Persian carpets in the Middle East. It increases dispersibility and gives it emulsifying properties. Emulsifying garlic with olive oil produces "aioli". They tend to have high emulsifying effects.