Process for producing color display means
申请(专利)号：
US19830545883
申请日期：
1983-10-31
公开/公告号：
US4587069A
公开/公告日期：
1986-05-06
申请(专利权)人：
TWINOAK PRODUCTS, INC.
被引量：
摘要：
A process for producing a color display means of the type used for detecting the depletion of a cleaning and disinfecting ingredient in a solution such as the water present in a toilet tank and bowl. The display means comprises a solid composition which includes a color indicator in a matrix, and this composition is located in the solution along with the cleaning and disinfecting ingredient. The cleaning and disinfecting 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 will, however, provide a substantial display of color after depletion of the ingredient whereby depletion of the ingredient can be detected. 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. This porosity is controlled by a manufacturing process which minimizes the introduction of air and provides a homogenous blend. The compacting of the solid composition into a cake-like structure is then regulated on a pressure and time basis.
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