US2505473A - Pressure sensitive record material - Google Patents

Pressure sensitive record material Download PDF

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US2505473A
US2505473A US59423A US5942348A US2505473A US 2505473 A US2505473 A US 2505473A US 59423 A US59423 A US 59423A US 5942348 A US5942348 A US 5942348A US 2505473 A US2505473 A US 2505473A
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reactants
color
pressure
record material
forming
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US59423A
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Barrett K Green
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NCR Voyix Corp
National Cash Register Co
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NCR Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/132—Chemical colour-forming components; Additives or binders therefor
    • B41M5/136—Organic colour formers, e.g. leuco dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02—Making microcapsules or microballoons
    • B01J13/025—Applications of microcapsules not provided for in other subclasses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31765—Inorganic-containing or next to inorganic-containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31768—Natural source-type polyamide [e.g., casein, gelatin, etc.]
    • Y10T428/31772—Next to cellulosic
    • Y10T428/31775—Paper

Definitions

  • This invention relates to improvements in pressure-sensitive record material.
  • This application is a division of the pending application of Barrett K. Green, Serial No. 784,938, filed November 8, 1947, for Pressure-sensitive record material.
  • Th principal object of this invention is to provide a pressure-sensitive record material on which a mark of distinctive color may be produced by the mere application of localized pressure and which is not subject to the disadvantages inherent in the pressure-sensitive record material disclosed in United States Letters Patent No. 2,299,693, patented October 20, 1942, on the application filed by Barrett K. Green on February 23, 1940.
  • That patent discloses a pressure-sensitive record material including the combination of an insulating medium, a rupturable solid material such as gum dammar, having included therein interspersed droplets of a plurality of liquid reagents, which are chemically reactive to produce a distinctive color in the record material at the points of application of localized pressure thereto, such pressure rupturing the insulating medium to permit chemical reaction between the two liquid reagents.
  • the two reagents disclosed in this patent are gallic acid and ferric ammonium sulphate, each dissolved in glycerine.
  • reagents are ionized by the glycerine, which constitutes an ionizing medium, and the chemical reaction pro ceeds by interchange of ions when the two solutions are allowed to mix, upon the rupture of the insulat ng medium.
  • the reaction disclosed in that patent depends upon the presence of the reagents in an ionizing medium.
  • any available ionizing medium is hygroscopic, with the result that the record material made in accordance with this patent is sensitive to an excess of moisture, and conditions of high humidity may cause the insulating medium to cease to be effective, with the result that the chemical reaction takes place without any application of localized pressure, and the record material is stained and discolored, so that it ceases to be useful.
  • the principal object of the present invention is to provide a pressure-sensitive record material that is not subject to the defects and disadvantages of that disclosed in Patent No. 2,229,693, as indicated above.
  • Another object of the present invention i to provide a record material upon which a mark of distinctive color may be produced, at the points of application of localized pressure thereto, by such mere application of localized pressure, and which will not become discolored or stained due 2 to the effect of light, atmospheric conditions, or aging.
  • Another object of this invention is to provide a pressure-sensitive record material in which the mark of distinctive color is produced by the chemical reaction of color-forming reactants, in the absence of any liquid ionizing medium therefor.
  • a further object of this invention is to provide a pressure-sensitive record material in which a mark of distinctive color is produced by a reaction between solid particles of color-forming reactants.
  • the present invention contemplates a pressure-sensitive record material comprising, in combination, a plurality of adsorption colorforrning reactants, such reactants being so selected that they react, in the absence of a liquid ionizing medium for the reactants, to form a distinctive color when brought into adsorption contact with each other, and a solid insulating medium insulating said reactants from colorforming reaction contact with each other.
  • the insulating medium Upon application of localized pressure to the record material, as by drawing a stylus across it, the insulating medium is ruptured at the points of ap plication of said localized pressure, and such rupture permits color-forming reaction contact between the reactants at such points, in the absence of any liquid ionizing medium for said reactants, The result is that a mark of distinctive color is produced by mere application of localized pressure.
  • the color-forming reaction employed is of the, so-called, adsorption type in which an inorganic material causes a color change in an organic material in adsorption contact therewith.
  • the organic material is an electron donor aromatic compound having a double bond system which is convertible to a more highly polarized conjugated form upon taking part in an electron acceptor donor solid material which enhances the depth of color per;
  • both of the color-forming material is not affected by atmospheric moisture and is relatively stable for a long period of time.
  • Organic film-forming hydrophilic colloid substances such as gelatin, starch, methyl cellulose, or polyvinyl alcohol may be'substituted for casein as the solid insulating medium in the record material constituting the embodiment of the invention.
  • Attapulgite may be substituted in this emreactants, as well as the insulating medium, are i.
  • a pressure-sensitive record material may be provided in which the solid particles of a plurality of color-forming reactants e are dispersed in a solid insulating medium, which insulates the particles from color-forming reac- I tion contact with each other.
  • the rupture of this solid insulating -medium'by therap-plication of localized pressure permits the solid particles of color-forming reactants to react with each other: at the-points of application of such pressure. to'produce the'markof distinctive color.
  • solid particles of one of the color-forming reactants are carried by and dispersed in a solid insulatingmedium, to which acoating of solid-particles of another color-forming reactant is applied.
  • this pressure-sensitive record material includes a base web, such as a fibrous webof paper or the like, towhich the coating of solid insulating medium andthe color-forming reactants is'applied.
  • The: preferred embodiment of this invention comprises a base webwofpaper" having applied thereto-a” coating including casein as the solid .insulatingmedium and two colorforming reactants: "namely, kaolin and the compound 2,4 bis [-p- (p-dimethylaminophenylazo 1 anilino] 6- hydroxy sym. triazine, having the structure 0
  • the pressure sensitive record material made usingthese' ingredients is "normally yellow in color, and the application'of localized pressure thereto, as'by drawing a stylus'across'th'e materiaL ruptures the" solid insulating medium and permits the solid particles ofikaolin and the organic color-forming reactant to come into color-forming reaction-contact with each other, producinga dark blue mark. at the points of application of such localized pressure.
  • a slurry of'kaolin and water was prepared includingioo parts by weight of kaolin to 50parts byweight of water and a minor proportion of a suitable dispersing agent, such as sodium metaphosphate.
  • casein in water A 29% by weight solution of casein in water was made, to which 5 parts icy-weight of-a 28%"ammonium-hydroxide solution were added;
  • the kaolinf-slurryand this alkaline casein solution were thoroughly mixed, inthe ratio by weight of kaolin to casein of 10 to 1, and blended, and the mixture'was applied to the paper as a coating, which was dried thereon, after which the coated'paper'was calendered or treated in any desired way to give'the proper surface finish.
  • a solution in' toluene'of about 0.5% by weight of the organic color-forming reactant above referred to was then applied to the coated side-of the paper. The excess of this solution was removed and the treated paper dried to'evaporate the toluene, after which it was ready for use.
  • This record material has also been made using gelatin as the solid insulating m'ediumand attapulgite as the inorganic color-forming reactant.
  • gelatin as the solid insulating m'ediumand attapulgite as the inorganic color-forming reactant.
  • a slurry of attapulgite and water was made, which was'thoroughly mixed with "a 20% The proportions of attapulgite and gelatin used should-be such that, in the finished coating, the weight ofthe gelatin will be about 20% ofthe weight of the attapulgite.
  • the mixture of the attapulgite slurry and the gelatin solution was applied-to the paper as a coating, which was dried thereon; Thereafter, by weight of the organic color form ng reactant was applied to the coated side of the paper.
  • Pressure-sensitive record material including the combination of'a supporting member, a pluralitYoiYadsorption color-formingreactants in acoaavs sence of a liquid ionizing medium for the reactants to form a distinctive color when brought into contact with each other, disposed in proximity to each other, at least one of the reactants bein an inorganic material and at least another of the reactants being an organic material one adsorbable on the other, and a solid insulating medium, derived from an organic hydrophilic film-forming colloid substance, insulating said reactants from color-forming reaction contact with each other, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit color-forming reaction contact between the reactants at such points, whereby a mark of distinctive color is produced by mere application of localized pressure, and wherein one of the coloriorming reactants is the compound 2,4 bis [p-(pdimethylaminophenylazo) anilinol 6 hydroxy
  • triazine having the structure and the inorganic reactant being in fine particle form providing a large adsorbent surface and which is an acid relative to the triazine compound so as to be an electron acceptor when in adsorption contact with said triazine compound.
  • Pressure-sensitive record material including the combination of a supporting member, solid particles of a plurality of adsorption color-forming reactants in the solid state disposed in contiguity to each other, at least one of said reactants being an inorganic material and at least another of said reactants being an organic material adsorbable one on the other, and a solid insulating medium, derived from an organic hydrophilic film-forming colloid material, insulating said solid reactant particles from color-forming reaction contact with each other, said reactants being so selected as to react to form a distinctive color when particles of each are brought into adsorption contact, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit color-forming reaction contact of the solid reactant particles at such points, whereby a mark of distinctive color is produced by mere application of localized pressure, and wherein one of the color-forming reactants is the compound 2,4.--bis[p-(p-dimethylaminophenylazo) anilinol 6
  • triazine having the structure and the inorganic reactant being in fine particle form providing a large adsorbent surface and which is an acid relative to the triazine compound so as to be an electron acceptor when in adsorption contact with said triazine compound.
  • Pressure-sensitive record material including the combination of a supporting member, a solid insulating medium derived from an organic hydrophilic film-forming colloid substance, solid particles of a first color-forming reactant dispersed therein and solid particles of a second color-forming reactant deposited thereon, one of said reactants being an inorganic compound and the other of said reactants being an organic compound, one adsorbable upon the other, said solid insulating medium insulating said solid reactant particles from color-forming reaction adsorption contact with each other, said reactants being so selected as to react, in the solid state, to form a distinctive color when brought into adsorption contact with each other, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit colorforming reaction adsorption contact of the solid reactant particles at such points, whereby a mark of distinctive color is produced by mere application of localized pressure, said second colorforming reactant being the compound 2,4 bisip- (p-dimethylaminophenyl
  • triazine having the structure and said first color-forming reactant being fine particles of the inorganic material providing a large adsorbent surface area and which is an acid relative to the triazine compound so as to be an electron acceptor when in adsorption contact with said triazine compound.
  • Pressure-sensitive record material including the combination of a base web and a coating thereon, said coating including a plurality of color-forming reactants in the solid state, so selected as to react by adsorption one upon another in the absence of an ionizing medium to form a distinctive color when brought into contact with each other, and disposed in proximity to each other, at least one of the reactants being an inorganic compound and at least another of the reactants being an organic compound one adsorbable on the other, and a solid insulating medium, derived from an organic hydrophilic film-forming colloid substance, insulating said reactants from color-forming reaction adsorption contact with each other, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit color-forming reaction contact between the reactants at such points, whereby a mark of distinctive color is: produced by mere application of localized pressure, one of the color-forming reactants being the organic compound 2,4 bis [p-(p-dimethylaminophen

Description

Patented Apr. 2 i950 PRESSURE SENSITIVE RECORD MATERIAL Barrett K. Green, Dayton, Ohio, assignor to The National Cash Register Company, Dayton, Ohio, a corporation of Maryland 12 Claims.
This invention relates to improvements in pressure-sensitive record material. This application is a division of the pending application of Barrett K. Green, Serial No. 784,938, filed November 8, 1947, for Pressure-sensitive record material.
Th principal object of this invention is to provide a pressure-sensitive record material on which a mark of distinctive color may be produced by the mere application of localized pressure and which is not subject to the disadvantages inherent in the pressure-sensitive record material disclosed in United States Letters Patent No. 2,299,693, patented October 20, 1942, on the application filed by Barrett K. Green on February 23, 1940. That patent discloses a pressure-sensitive record material including the combination of an insulating medium, a rupturable solid material such as gum dammar, having included therein interspersed droplets of a plurality of liquid reagents, which are chemically reactive to produce a distinctive color in the record material at the points of application of localized pressure thereto, such pressure rupturing the insulating medium to permit chemical reaction between the two liquid reagents. The two reagents disclosed in this patent are gallic acid and ferric ammonium sulphate, each dissolved in glycerine. These reagents are ionized by the glycerine, which constitutes an ionizing medium, and the chemical reaction pro ceeds by interchange of ions when the two solutions are allowed to mix, upon the rupture of the insulat ng medium. The reaction disclosed in that patent depends upon the presence of the reagents in an ionizing medium. However, any available ionizing medium is hygroscopic, with the result that the record material made in accordance with this patent is sensitive to an excess of moisture, and conditions of high humidity may cause the insulating medium to cease to be effective, with the result that the chemical reaction takes place without any application of localized pressure, and the record material is stained and discolored, so that it ceases to be useful.
As stated above, the principal object of the present invention is to provide a pressure-sensitive record material that is not subject to the defects and disadvantages of that disclosed in Patent No. 2,229,693, as indicated above.
Another object of the present invention i to provide a record material upon which a mark of distinctive color may be produced, at the points of application of localized pressure thereto, by such mere application of localized pressure, and which will not become discolored or stained due 2 to the effect of light, atmospheric conditions, or aging.
In short, it is the object of this invention to provide a pressure-sensitive record material in which the mark of distinctive color will be produced only at the points of application of localized pressure, and at no other points, and under no other conditions.
Another object of this invention is to provide a pressure-sensitive record material in which the mark of distinctive color is produced by the chemical reaction of color-forming reactants, in the absence of any liquid ionizing medium therefor.
A further object of this invention is to provide a pressure-sensitive record material in which a mark of distinctive color is produced by a reaction between solid particles of color-forming reactants.
Further objects, and objects relating to details and economies of production, will defin tel appear from the detailed description to follow. The objects of this invention have been attained by the several embodiments thereof described in detail in the followin specification. This invention is clearly defined and pointed out in the appended claims.
In general, the present invention contemplates a pressure-sensitive record material comprising, in combination, a plurality of adsorption colorforrning reactants, such reactants being so selected that they react, in the absence of a liquid ionizing medium for the reactants, to form a distinctive color when brought into adsorption contact with each other, and a solid insulating medium insulating said reactants from colorforming reaction contact with each other. Upon application of localized pressure to the record material, as by drawing a stylus across it, the insulating medium is ruptured at the points of ap plication of said localized pressure, and such rupture permits color-forming reaction contact between the reactants at such points, in the absence of any liquid ionizing medium for said reactants, The result is that a mark of distinctive color is produced by mere application of localized pressure.
The color-forming reaction employed is of the, so-called, adsorption type in which an inorganic material causes a color change in an organic material in adsorption contact therewith.
Of the reactant materials employed the organic material is an electron donor aromatic compound having a double bond system which is convertible to a more highly polarized conjugated form upon taking part in an electron acceptor donor solid material which enhances the depth of color per;
unit area of the record material.
In this invention, both of the color-forming material is not affected by atmospheric moisture and is relatively stable for a long period of time. Organic film-forming hydrophilic colloid substances such as gelatin, starch, methyl cellulose, or polyvinyl alcohol may be'substituted for casein as the solid insulating medium in the record material constituting the embodiment of the invention. Attapulgite may be substituted in this emreactants, as well as the insulating medium, are i.
in the solid state, and the 'eolor-form'ing-ream' tion takes place upon mere contact of solid parw.
ticles of the reactants. A pressure-sensitive record material may be provided in which the solid particles of a plurality of color-forming reactants e are dispersed in a solid insulating medium, which insulates the particles from color-forming reac- I tion contact with each other. The rupture of this solid insulating -medium'by therap-plication of localized pressure permits the solid particles of color-forming reactants to react with each other: at the-points of application of such pressure. to'produce the'markof distinctive color. According to this invention, solid particles of one of the color-forming reactants are carried by and dispersed in a solid insulatingmedium, to which acoating of solid-particles of another color-forming reactant is applied.
The application of localized pressure ruptures the solid insulating medium-at thepoints of application of such= pressure and'brings about color-forming reaction contact between the solid particles of colon-forming reactants at such points, thus producing the mark ofiidistinctive color; Preferably, this pressure-sensitive record material includes a base web, such as a fibrous webof paper or the like, towhich the coating of solid insulating medium andthe color-forming reactants is'applied.
Since it is difficultto show precisely the-spatial relationship between the solid particlesof colorforming reactants, the solid insulating medium, and the base web, it is preferred not to attempt to illustrate any embodiment of this invention by drawings.
'In'the following examples, there will be described embodiments of this invention, by means of which the objects of the invention have been successfully attained.
The: preferred embodiment of this invention comprises a base webwofpaper" having applied thereto-a" coating including casein as the solid .insulatingmedium and two colorforming reactants: "namely, kaolin and the compound 2,4 bis [-p- (p-dimethylaminophenylazo 1 anilino] 6- hydroxy sym. triazine, having the structure 0 The pressure sensitive record material made usingthese' ingredients is "normally yellow in color, and the application'of localized pressure thereto, as'by drawing a stylus'across'th'e materiaL ruptures the" solid insulating medium and permits the solid particles ofikaolin and the organic color-forming reactant to come into color-forming reaction-contact with each other, producinga dark blue mark. at the points of application of such localized pressure. This record solid. insulating .medium.
record material has been made successfully, using byweight solution-of gelatin.
a solution in toluene of about 9.5%
bodiment for the kaolin, as the inorganic material, "using gelatin or polyvinyl alcohol as the A pressure-sensitive .the ingredients referred to above, by the follow- .ing .method: A slurry of'kaolin and water was prepared includingioo parts by weight of kaolin to 50parts byweight of water and a minor proportion of a suitable dispersing agent, such as sodium metaphosphate. A 29% by weight solution of casein in water was made, to which 5 parts icy-weight of-a 28%"ammonium-hydroxide solution were added; The kaolinf-slurryand this alkaline casein solution were thoroughly mixed, inthe ratio by weight of kaolin to casein of 10 to 1, and blended, and the mixture'was applied to the paper as a coating, which was dried thereon, after which the coated'paper'was calendered or treated in any desired way to give'the proper surface finish. A solution in' toluene'of about 0.5% by weight of the organic color-forming reactant above referred to was then applied to the coated side-of the paper. The excess of this solution was removed and the treated paper dried to'evaporate the toluene, after which it was ready for use.
This record material has also been made using gelatin as the solid insulating m'ediumand attapulgite as the inorganic color-forming reactant. "In this case, a slurry of attapulgite and water was made, which was'thoroughly mixed with "a 20% The proportions of attapulgite and gelatin used should-be such that, in the finished coating, the weight ofthe gelatin will be about 20% ofthe weight of the attapulgite. The mixture of the attapulgite slurry and the gelatin solution was applied-to the paper as a coating, which was dried thereon; Thereafter, by weight of the organic color form ng reactant was applied to the coated side of the paper. The excess of .this solution was'rernoved and the treated paper dried to evaporate thetoluene'af er which it was ready for use; The'same prccdure wassuccessfully used with a solution of polyvinyl alcohol substituted for the gelatin solution. The proportions of polyvinyl alcohol and of attapulgite used where such that the finished coating had attapulgite and polyvinyl alcohol therein in the ratio byweight of 10 to 1. The methods and processes of making pressure-sensitive record material disclosed herein are not claimed in this application but are disclosed and claimed in the pendin application of Barrett K. Green, Serial No. 784,939, filed November 8, 1947,-for Process for making pressuresensitive record material, and in the division thereofi'serial No. 63,212, filed'December 2, 1948.
It isuhderstood that the 'pressure sensitive record material described herein is susceptible of considerable variation without departing from the spirit of the invention.
What is claimed is:
1. Pressure-sensitive record material including the combination of'a supporting member, a pluralitYoiYadsorption color-formingreactants in acoaavs sence of a liquid ionizing medium for the reactants to form a distinctive color when brought into contact with each other, disposed in proximity to each other, at least one of the reactants bein an inorganic material and at least another of the reactants being an organic material one adsorbable on the other, and a solid insulating medium, derived from an organic hydrophilic film-forming colloid substance, insulating said reactants from color-forming reaction contact with each other, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit color-forming reaction contact between the reactants at such points, whereby a mark of distinctive color is produced by mere application of localized pressure, and wherein one of the coloriorming reactants is the compound 2,4 bis [p-(pdimethylaminophenylazo) anilinol 6 hydroxy sym. triazine, having the structure and the inorganic reactant being in fine particle form providing a large adsorbent surface and which is an acid relative to the triazine compound so as to be an electron acceptor when in adsorption contact with said triazine compound.
2. The record material of claim 1 in which another color-forming reactant is kaolin.
3. The record material of claim 2 in which the solid insulating medium is casein.
4. Pressure-sensitive record material including the combination of a supporting member, solid particles of a plurality of adsorption color-forming reactants in the solid state disposed in contiguity to each other, at least one of said reactants being an inorganic material and at least another of said reactants being an organic material adsorbable one on the other, and a solid insulating medium, derived from an organic hydrophilic film-forming colloid material, insulating said solid reactant particles from color-forming reaction contact with each other, said reactants being so selected as to react to form a distinctive color when particles of each are brought into adsorption contact, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit color-forming reaction contact of the solid reactant particles at such points, whereby a mark of distinctive color is produced by mere application of localized pressure, and wherein one of the color-forming reactants is the compound 2,4.--bis[p-(p-dimethylaminophenylazo) anilinol 6 hydroxy sym. triazine, having the structure and the inorganic reactant being in fine particle form providing a large adsorbent surface and which is an acid relative to the triazine compound so as to be an electron acceptor when in adsorption contact with said triazine compound.
5. The record material of claim 4 in which another color-forming reactant is kaolin.
6. The record material of claim 5 in which the solid insulating medium is casein.
7. Pressure-sensitive record material including the combination of a supporting member, a solid insulating medium derived from an organic hydrophilic film-forming colloid substance, solid particles of a first color-forming reactant dispersed therein and solid particles of a second color-forming reactant deposited thereon, one of said reactants being an inorganic compound and the other of said reactants being an organic compound, one adsorbable upon the other, said solid insulating medium insulating said solid reactant particles from color-forming reaction adsorption contact with each other, said reactants being so selected as to react, in the solid state, to form a distinctive color when brought into adsorption contact with each other, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit colorforming reaction adsorption contact of the solid reactant particles at such points, whereby a mark of distinctive color is produced by mere application of localized pressure, said second colorforming reactant being the compound 2,4 bisip- (p-dimethylaminophenylazo) anilino] B-hydroxy sym. triazine, having the structure and said first color-forming reactant being fine particles of the inorganic material providing a large adsorbent surface area and which is an acid relative to the triazine compound so as to be an electron acceptor when in adsorption contact with said triazine compound.
8. The record material of claim 7 in which the first color-forming reactant is kaolin.
9. The record material of claim 8 in which the solid insulating medium is casein.
l0. Pressure-sensitive record material including the combination of a base web and a coating thereon, said coating including a plurality of color-forming reactants in the solid state, so selected as to react by adsorption one upon another in the absence of an ionizing medium to form a distinctive color when brought into contact with each other, and disposed in proximity to each other, at least one of the reactants being an inorganic compound and at least another of the reactants being an organic compound one adsorbable on the other, and a solid insulating medium, derived from an organic hydrophilic film-forming colloid substance, insulating said reactants from color-forming reaction adsorption contact with each other, the application of localized pressure to the record material rupturing said insulating medium at the points of application of such pressure to permit color-forming reaction contact between the reactants at such points, whereby a mark of distinctive color is: produced by mere application of localized pressure, one of the color-forming reactants being the organic compound 2,4 bis [p-(p-dimethylaminophenylazo) "anilinoi G-hydroxy symr'triazine, having the structure V and the inorganic reactant being in fine particle form to provide a large adsorbent'surface area and which is an acid relative to the organic compound-so. astobean electron acceptor when in adsorptioncontact with said organic compound.
' REFERENCES CITED The following references are of record in the file .of this patent: 10
1 FOREIGN PATENTS Country Date Great'Britain Jan. 4', 1943 Number

Claims (1)

1. PRESSURE-SENSITIVE RECORD MATERIAL INCLUDING THE COMBINATION OF A SUPPORTING MEMBER, A PLURALITY OF ADSORPTION COLOR-FORMING REACTANTS IN THE SOLID STATE, SO SELECTED AS TO REACT IN THE ABSENCE OF A LIQUID IONIZING MEDIUM FOR THE REACTANTS TO FORM A DISTINCTIVE COLOR WHEN BROUGHT INTO CONTACT WITH EACH OTHER, DISPOSED IN PROXIMITY TO EACH OTHER, AT LEAST ONE OF THE REACTANTS BEING AN INORGANIC MATERIAL AND AT LEAST ANOTHER OF THE REACTANTS BEING AN ORGANIC MATERIAL ONE ADSORBABLE ON THE OTHER, AND A SOLID INSULATING MEDIUM, DERIVED FROM AN ORGANIC HYDROPHILIC FILM-FORMING COLLOID SUBSTANCE, INSULATING SAID REACTANTS FROM COLOR-FORMING REACTION CONTACT WITH EACH OTHER, THE APPLICATION OF LOCALIZED PRESSURE TO THE RECORD MATERIAL RUPTURING SAID INSULATING MEDIUM AT THE POINTS OF APPLICATION OF SUCH PRESSURE TO PERMIT COLOR-FORMING REACTION CONTACT BETWEEN THE REACTANTS AT SUCH POINTS, WHEREBY A MARK OF DISTINCTIVE COLOR IS PRODUCED BY MERE APPLICATION OF LOCALIZED PRESSURE, AND WHEREIN ONE OF THE COLORFORMING REACTANTS IS THE COMPOUND 2,4 BIS (P-(PDIMETHYLAMINOPHENYLAZO) ANILINO) 6 - HYDROXY SYM. TRIAZINE, HAVING THE STRUCTURE.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348234A (en) * 1979-03-20 1982-09-07 Ciba-Geigy Corporation Coating compositions for the production of a recording material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB550332A (en) * 1941-06-30 1943-01-04 Josef Groak Improvements in or relating to transfer copying materials

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB550332A (en) * 1941-06-30 1943-01-04 Josef Groak Improvements in or relating to transfer copying materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348234A (en) * 1979-03-20 1982-09-07 Ciba-Geigy Corporation Coating compositions for the production of a recording material

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