Time temperature indicator label
AssigneeIntray Limited
InventorsJohn Robinson, Stephen Wintersgill, Andy Hancock, Martin Peacock, Sarah Akbar, Brunella Maranesi
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Abstract
A time-temperature integrating (TTi) indicator label comprises an initiator reservoir and a target reservoir, said initiator reservoir containing a pH modification system and said target reservoir comprising a pH responsive indicator. The pH responsive indicator may be photo-initiated. There is also provided a time-temperature indicator label comprising first and second reservoirs separated by a hydrogel valve, said valve allowing passage of an acid from said first reservoir to said second reservoir when the hydrogel valve is activated.
Claims36
A time-temperature integrating (TTi) indicator label comprises an initiator reservoir and a target reservoir, said initiator reservoir containing a photoinitiated pH modification system and said target reservoir comprising a pH responsive indicator.
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A time-temperature indicator label comprising first and second reservoirs separated by a hydrogel valve, said valve allowing passage of an acid from said first reservoir to said second reservoir when the hydrogel valve is activated.
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Dependencies are inferred from the claim text.