Process for evaluating the state of the surface of keratinous fi

Details Process for evaluating the state of the surface of keratinous fi Process for evaluating the state of the surface of keratinous fi

1986-01-10

1987-02-10

Hart, Charles

Chemistry: analytical and immunological testing

Process or composition for determination of physical state...

Surface area, porosity, imperfection, or alteration

436119, 436164, 436 86, G01N 3100

Patent

active

046422943

ABSTRACT:
According to this process, (a) a compound capable of entering the surface interstices of the keratinous fibres is chosen; which is capable of producing, in an aqueous medium, a solution which is colored naturally or capable of being colored by a development, and capable, under the conditions of the process, of being stable and maintained at a pH such that no ionic charge appears; (b) an aqueous immersion solution containing the compounds chosen is prepared; (c) a specimen of the fibres to be studied is immersed therein to produce an "uptake" of the compound on the fibres, which is a function of their surface state; (d) the specimen is withdrawn from the solution and the excess of solution saturating the fibres is removed; (e) the compound present on the fibres is extracted by immersing the latter in at least one aqueous bath at the same pH as that of the aqueous immersion solution to obtain an extraction solution which is colored or whose color is developed in a step (f); and (g) the state of the surface of the fibres is deduced from the quantity of the compounds present in the extraction solution.

REFERENCES:
patent: 3992149 (1976-11-01), Wang
patent: 4421859 (1983-12-01), Bore et al.

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