PET bottles can be perfectly labelled with water-based labelling adhesive. Most known water-based labelling adhesives are Krones and Langguth. Because these machines have their own specific character, adhesives are adapted especially for each application.
For recyclable PET labels need to be alkali washable. Therefore the adhesive needs to meet this requirement. So, why not make all adhesives alkali-soluble? Well, some bottles need to resist the ice water-resistant test, to have your ice-cold drink from a box filled with ice-cubes..