The patented pH-Fix technology stands for a high quality, color-fixed pH test strip system. For many years chemists as well as inexperienced users have appreciated pH-Fix's optimal usability, reliability, and precision. The long handle prevents fingers from coming into contact with the sample. It adds handling convenience and increases safety of operation. This allows a high standard of "workplace safety" when testing aggressive solutions. To prevent bleeding, the pH-indicator is chemically bound to the cellulose fiber. Unlike classic pH papers, pH-Fix effectively protects the sample against contamination and enables measurements even in weakly buffered or strongly alkaline solutions. Four different color blocks for each pH-value (pH-Fix 0-14) ensure highly precise pH-determination and make the application rapid and reliable.