Peroxide low range.jpg 166.4 KB · Views: 7,337 Platinum anode catalyst.png 316.1 KB · Views: 3,522 After a six-hour exposure, brown coloration means less bleached..png 525.1 KB · Views: 3,430 High range peroxide test strips – 0.5 to 100 ppm.png 243.5 KB · Views: 3,164