Silica-based carrier impregnated with iron(III) or iron(II) salts functions as a humidity indicator giving a yellow/amber to nearly colourless colour change as the carrier humidifies.
申请公布号
WO0065339(A1)
申请公布日期
2000.11.02
申请号
WO2000GB01390
申请日期
2000.04.12
申请人
CROSFIELD LIMITED;MORETON, STEPHEN;EARL, GRAHAM, JAMES
