Decoloring device, method of determining decoloring success or failure and computer-readable recording medium recording decoloring success or failure determining program

A decoloring device comprising:na decoloring unit that decolors an image formed with a decolorable coloring agent on a sheet;a first sheet conveying unit that conveys the sheet to the decoloring unit;a pre-decoloring reading unit that reads the image on the sheet conveyed by the first sheet conveying unit before the decoloring;a type determining unit that determines a type of content on the sheet conveyed to the decoloring unit, based on the image read by the pre-decoloring reading unit;a second sheet conveying unit that conveys the sheet from the decoloring unit;a post-decoloring reading unit that reads a remaining image on the sheet conveyed by the second sheet conveying unit after the decoloring;a determination criterion setting unit that sets at least one determination criterion for determining whether or not the decoloring by the decoloring unit is successful based on the determined type of content; anda decoloring success or failure determining unit that determines whether or not the decoloring of the image on the sheet by the decoloring unit is successful based on the remaining image read by the post-decoloring reading unit and based on the determination criterion set by the determination criterion setting unit.

A method of determining a decoloring success or failure by a decoloring device including a decoloring unit that decolors an image formed with a decolorable coloring agent on a sheet, a first sheet conveying unit that conveys the sheet to the decoloring unit, a pre-decoloring reading unit that reads the image on the sheet conveyed by the first sheet conveying unit before the decoloring, a second sheet conveying unit that conveys the sheet from the decoloring unit, and a post-decoloring reading unit that reads a remaining image on the sheet conveyed by the second sheet conveying unit after the decoloring, the method comprising:ndetermining a type of content on the sheet conveyed to the decoloring unit, based on the image read by the pre-decoloring reading unit;setting at least one determination criterion related to whether or not the decoloring is successful based on the determined type of content; anddetermining whether or not the decoloring of the image on the sheet by the decoloring unit is successful based on the remaining image read by the post-decoloring reading unit and based on the determination criterion.

A non-transitory computer-readable recording medium recording a decoloring success or failure determining program that causes a computer to execute a decoloring success or failure determination in a decoloring device including a decoloring unit that decolors an image formed with a decolorable coloring agent on a sheet, a first sheet conveying unit that conveys the sheet to the decoloring unit, a pre-decoloring reading unit that reads the image on the sheet conveyed by the first sheet conveying unit before the decoloring, a second sheet conveying unit that conveys the sheet decolored by the decoloring unit, and a post-decoloring reading unit that reads a remaining image on the sheet conveyed by the second sheet conveying unit after the decoloring, the decoloring success or failure determining program causing the computer to execute:ndetermining a type of content on the sheet conveyed to the decoloring unit, based on the image read by the pre-decoloring reading unit;setting at least one determination criterion related to the decoloring success or failure determination based on the determined type of content; anddetermining whether or not the decoloring by the decoloring unit is successful based on the remaining image read by the post-decoloring reading unit and based on the determination criterion.