The method is based on technology used in medical analysis of urine. It was developed to assist people with diabetes to determine what treatment they needed. Test strips in foil packages are guaranteed for 1 year from date of manufacture. Test strips in the bottle packages are guaranteed to work 2 years from date of manufacture. The pad will be a brown color versus the white to light yellow that a fresh pad will have.
Test strips are to be disposed with normal paper waste.
They are not hazardous or toxic. Test strips were developed for medical diagnostic and laboratory use over 30 years ago. Since that time they have replaced liquid tests and supplemented instrument tests. PDF stands for Portable Document Format. The number next to PDF is the size of the document.