Peroxide low range.jpg 166.4 KB · Views: 15,893 Platinum anode catalyst.png 316.1 KB · Views: 4,536 After a six-hour exposure, brown coloration means less bleached..png 525.1 KB · Views: 4,439 High range peroxide test strips – 0.5 to 100 ppm.png 243.5 KB · Views: 4,179