Method and means for recording sweat gland activity
First Claim
1. A method for recording sweat gland activity by obtaining a clear resolute image which is directly proportional to the amount of perspiration exuded at each sweat gland orifice, the method comprising the steps of:
- (a) providing a dry sensitized substrate having a surface layer comprising a mixture of a starch and an oxidizing agent;
(b) treating a skin area to be recorded with an iodide solution of a compound selected from the group consisting of sodium iodide, calcium iodide, potassium iodide and mixtures thereof;
(c) allowing the iodide treated skin area to dry in areas where no perspiration exists and to receive perspiration where it develops at each gland orifice; and
(d) momentarily contacting the surface layer of the sensitized substrate with the iodide treated skin area to produce the clear resolute image.
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Abstract
Method and apparatus for recording sweat gland activity which provides a pictorial representation thereof by physical contact of an iodide treated skin area with a dry sensitized substrate. In one preferred embodiment, the sensitized substrate comprises a sheet material which has been coated with an aqueous solution containing from 1 to 10 percent by weight of starch and from 2 to 10 percent by weight of a suitable oxidizing agent such as potassium persulfate. Alternately, the dry sensitized substrate comprises a starch-oxidizing agent mixture which has been impregnated into an absorbent base layer. With slight modification of the foregoing embodiment, the present invention also provides a method and apparatus for obtaining inkless fingerprints by forming a sensitized coating in situ on a substrate. For fingerprinting purposes, the sensitized coating is preferably formed from a quick drying starch-oxidizing agent solution including alcohol as a solvent. Accordingly, an aqueous iodide solution is applied to the skin area, and the treated skin area is subsequently contacted with the dry sensitized coating to produce the fingerprint.
85 Citations
99 Claims
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1. A method for recording sweat gland activity by obtaining a clear resolute image which is directly proportional to the amount of perspiration exuded at each sweat gland orifice, the method comprising the steps of:
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(a) providing a dry sensitized substrate having a surface layer comprising a mixture of a starch and an oxidizing agent; (b) treating a skin area to be recorded with an iodide solution of a compound selected from the group consisting of sodium iodide, calcium iodide, potassium iodide and mixtures thereof; (c) allowing the iodide treated skin area to dry in areas where no perspiration exists and to receive perspiration where it develops at each gland orifice; and (d) momentarily contacting the surface layer of the sensitized substrate with the iodide treated skin area to produce the clear resolute image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A means for recording sweat gland activity by obtaining a clear resolute image which is directly proportional to the amount of perspiration exuded at each sweat gland orifice, the means comprising in combination:
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(i) a dry sensitized substrate having a surface layer mixture of a starch and an oxidizing agent; and (ii) an iodide solution to be applied to a skin area to be recorded, the iodide solution of a compound selected from the group consisting of sodium iodide, calcium iodide, potassium iodide, and mixtures thereof and a solvent. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A method for producing a relatively permanent inkless fingerprint, the method comprising the steps of:
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(a) providing a dry sensitized substrate having a surface layer comprising a mixture of starch and an oxidizing agent; (b) moistening a skin area to be imprinted with an aqueous iodide solution of a compound selected from the group consisting of sodium iodide, calcium iodide, potassium iodide and mixtures thereof; and (c) momentarily contacting the surface layer of the sensitized substrate with the iodide treated skin area, while said skin area is still in a moistened condition to produce the inkless fingerprint. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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- 76. A sensitized substrate comprising a substrate having a surface layer with dry coating coverage of from about 2 to 10 pounds per 3,000 square feet, the surface layer including a mixture of a strach and an oxidizing agent, said starch being selected from the group consisting of rice starch, potato starch, corn starch, wheat starch, tapioca starch and mixtures thereof, and said oxidizing agent being selected from the group consisting of sodium persulfate, postassium persulfate, sodium iodate, sodium bromate, sodium chlorate, and mixtures thereof.
- 93. A sensitizing coating fluid comprising a starch, an oxidizing agent, and a solvent, said starch being selected from the group consisting of rice starch, corn starch, potato starch, wheat starch, tapioca starch and mixtures thereof, said oxidizing agent being selected from the group consisting of sodium persulfate, potassium persulfate, sodium iodate, sodium bromate, sodium chlorate and mixtures thereof, and said solvent being selected from the group consisting of alcohol, water, and mixtures thereof.
Specification