| 摘要 |
PURPOSE:To obtain captioned solution capable of providing clear printed matter with strong desensitization strength and less background contamination by preparing phytic acid, from which condensate is removed by refining under specific conditions in the specific pure concentration aqueous solution. CONSTITUTION:After phytic acid is refined in advance at a temperature higher than 50 deg.C, it is reduced under pressure and is concentrated at a temperature lower than 45 deg.C to prepare an aqueous solution containing less than 50%, preferably less than 30% of pure concentration of phytic acid, and a desensitization solution is prepared with this. |
