A simple method of testing when Beerline Cleaner is present. Paper turns blue in alkaline solutions, a must for safety.
USAGE: After performing normal brewery cleaning process and flushing, test for alkalinity by taking a pink test paper and wetting it with beerline flush water from tap. If it changes to a bluish colour, then continue flushing with water and retest until paper stays pink. Pink colour on the testing paper means it is safe to remove signs.