thin film or in a shallow container and dried preferrably the formulation of each of the component parts is accomplished by first dissolving the kno 3 completely each time before adding the second constituent of each part adding further water if necessary it is also desirable to use lukewarm water to facilitate dissolution though that is not essential to successfully compound the final product the mixed components are either dried at room temperature or at an elevated temperature as desired if an elevated temperature is selected it is important that the temperature be controlled to prevent the dried mixture from exceeding a temperature of approximately 175 u00b0 f 79 u00b0 c at temperatures above about 184 u00b0 f 84 u00b0 c the erythorbic acid will undergo undesirable decomposition the products of which can produce a hazardous condition in the presence of the strong oxidizer kno 3 during the drying process when elevated temperatures are employed a color change will occur and the dry mixture will take on a golden brown color care must be taken to avoid the formation of a deep red color in the mixture as that can be an indication that the constituents have either reacted due to an.