Pressure imaging and indicating materials and devices
OwnerBryan Greenerinventor
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Abstract
This invention relates to pressure indicating materials, in particular sheet materials that indicate pressure by a colour transformation. Materials and two-sheet pressure imaging means are described that comprise a first sheet material comprising a microporous membrane within which is associated a solution comprising a colour former and a second sheet comprising a colour developer.
Claims28
A sheet material comprising a microporous membrane within which is associated a solution comprising a colour former, wherein the microporous membrane has a pore size of about 0.1 to 5.0 micrometres.
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A process for the impregnation of a microporous membrane with a solution comprising a colour former, comprising:
- diluting the colour former solution in a volatile solvent,
- impregnating the microporous membrane with the resulting solution and
- removing the volatile solvent,
- wherein the microporous membrane has a pore size of about 0.1 to 5.0 micrometres.
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Dependencies are inferred from the claim text.