AMSTERDAM--(BUSINESS WIRE)--PPG (NYSE: PPG) today announced that its Architectural Coatings manufacturing sites in Amsterdam, the Netherlands and Søborg, Denmark have received REDCert² certification, which verifies the use of sustainable raw materials through a certified chain of custody. REDCert² uses the mass balance approach, a recognized method for attributing the sustainability value of certified inputs. This ensures that PPG's products reflect responsible sourcing throughout the manufactu. ...