routine tests for surface dealkalization in the glass container industry all generally aim to evaluate the amount of alkali extracted from the glass when it is rinsed with or exposed to purified water. for example, dealkalization can be quickly checked by introducing a small volume of distilled water to a freshly made bottle and rolling the bottle gently to pass the water completely over its inside surface. the ph of the rinse water is then measured; untreated containers will tend to yield a slightly alkaline ph in the 8-9 range due to extracted alkali, while dealkalized containers tend to yield a ph that remains approximately neutral.