Cleaning and disinfecting systems including color display means

Details Cleaning and disinfecting systems including color display means Cleaning and disinfecting systems including color display means

G - Physics

01

N

150/7

G01N 31/22 (2006.01) E03D 9/02 (2006.01) G01N 33/18 (2006.01)

Patent

CA 1242628

- 1 - CLEANING AND DISINFECTING SYSTEMS INCLUDING COLOR DISPLAY MEANS Abstract Of The Disclosure A process for detecting the depletion of a clean- ing and disinfecting ingredient in a solution such as the water present in a toilet tank and bowl. A solid composi- tion comprising a color indicator in a matrix is located in the solution along with the ingredient. The porosity of the solid composition is maintained within limits to provide a means for controlling the rate of release of the color indicator into the solution. The cleaning and dis- infecting ingredient has a bleaching tendency relative to the color indicator so that a display of color is minimal or non-existent for as long as significant amounts of the ingredient are present. The color indicator is provided in sufficient amounts so that, when considering the controlled rate of release, there will be continued release of color indicator after depletion of the ingredient. This will then provide a substantial display of color whereby deple- tion of the ingredient can be detected.

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