| 摘要 |
PURPOSE:The titled dosimeter, obtained by covering a PVA film containing a compound containing bipyridinium skeleton, etc., with an oxygen-barrier film, etc., and capable of suppressing oxidative reaction of reduced form bipyridinium radicals in a colored film and preventing the fading. CONSTITUTION:A dosimeter obtained by covering a PVA film or sheet containing a compound containing bipyridinium skeleton, preferably an oxidized form viologen dyestuff expressed by the formula (X<-> is counter ion) with an oxygen-barrier film or sheet, preferably PVA film or sheet.
|
