WATER VAPOR - FORMALDEHYDE STERILIZATION PROCESS INDICATOR INK

摘要

PROBLEM TO BE SOLVED: To provide a water vapor - formaldehyde sterilization process chemical indicator ink.;SOLUTION: The chemical indicator ink contains at least one primary organic material that is selected from a group consisting of Congo red, benzopurpurin B, Chicago sky blue 6B, direct red 75, Evans blue, naphthol blue black, nitro red, and their combination. The organic dye is subjected to irreversible color change when being exposed to a formaldehyde under the presence of water vapor, and is not subjected to a color change when being exposed to other sterilization processes. The chemical indicator ink can further contain at least one secondary organic dye that is not affected by a color change when being exposed to formaldehyde water vapor under the presence of the water vapor.;COPYRIGHT: (C)2003,JPO