solution must be of sufficiently low viscosity to be sprayed through a nozzle to form droplets and be liquid at 50 u00b0 c it must also be free of precipitates between 50 u00b0 c and 110 u00b0 c as used herein the term 34 essentially saturated solution 34 means that the least soluble material or materials at the desired level of materials relative to each other be in essentially saturation amounts in the water the remaining materials being in less than saturation amount to determine this the desired anhydrous balance of materials including water of hydration is first determined when this has been determined just enough water is added to provide complete dissolution of the least soluble component and to insure that the composition is liquid at 50 u00b0 c and the material has a low enough viscosity to be sprayed to form droplets and is free of precipitates between 50 u00b0 c and 110 u00b0 c listed below are several examples of aqueous solutions including alkali metal hydroxide and alkali metal nitrates as well as chlorides and permanganates in some examples ______________________________________55 0 water27 6 sodium hydroxide13 0 sodium nitrate 1 4 potassium hydroxide 3 0 sodium chloride100 0 ______________________________________ based on commercial grade of koh at about 85 purity sodium nitrate and sodium chloride saturated in the presence of that much sodium and potassium hydroxide nitrate no 3 saturated in the presence of that much potassium hydroxide nitrate no 3 and chloride cl saturated in the presence of that much sodium and potassium hydroxide it should be noted that in aqueous solution the various materials are ionized and the saturation is determined by the concentration at which these ions form a reaction product which will precipitate all of the solutions in the.