US1897843A - Light sensitive tropochromic coating - Google Patents

Light sensitive tropochromic coating Download PDF

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Publication number
US1897843A
US1897843A US473785A US47378530A US1897843A US 1897843 A US1897843 A US 1897843A US 473785 A US473785 A US 473785A US 47378530 A US47378530 A US 47378530A US 1897843 A US1897843 A US 1897843A
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US
United States
Prior art keywords
tropochromic
light sensitive
coating
light
sulfide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US473785A
Inventor
Kenneth C D Hickman
Jr Ludwig A Staib
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
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Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US473785A priority Critical patent/US1897843A/en
Priority to US473784A priority patent/US1880449A/en
Priority to DEK119544D priority patent/DE632602C/en
Priority to FR730043D priority patent/FR730043A/en
Priority to FR730876D priority patent/FR730876A/en
Priority to GB22265/31A priority patent/GB372637A/en
Application granted granted Critical
Publication of US1897843A publication Critical patent/US1897843A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/32—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers one component being a heavy metal compound, e.g. lead or iron
    • 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
    • B41M5/20—Duplicating or marking methods; Sheet materials for use therein using electric current
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
    • G03C1/725—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing inorganic compounds

Definitions

  • This invention relates to tropocl 'omic coatings, and in particular to tropochromic coatings which are sensitive to light.
  • the object of this invention is to provide improved sensitivity and particularly light sensitivity in paper and other supports coated with tropochromic mixtures of the kind disclosed in our co-pending application, Serial No. 473,784, filed August 7, 1930.
  • tropochromic is used throughout this specification to denote any layer containing substances which have an in herent ability to change color when suitably stimulated.
  • Tropochromic layers are well known, and in fact, most photographic reproducing materials have light sensitive tropochromic layers.
  • the word tropochromic is used to denote the ability to change color and does not specify the kind of stimulus, whether light, heat, electricity, or chemical environment, which induces the change.
  • the tropochromic coatings referred to in our co-pending application consist of an organic substance capable of yielding a sulfide-ion and a metal salt capable of yield ing a colored metal sulfide.
  • a satisfactory light sensitive paper has the following composition:
  • Certain chromariines are equally effective, not-ably hexamino chromic chloride which may be substituted for the cobaltic salt in the above formula.
  • a photographic support having a coating containing a salt of a metal which in the presence of free sulphur ions forms a colored sulphide, an organic compound capable of yielding a sulphide ion, and including a compound which under the influence of light yields a substance capable of promoting the reaction between the first two compounds to form a visible image.
  • a tropochromic coating consisting of an organic substance containing available sulfur, a metal salt which in the presence of free sulphur ions forms a visible sulphide, and a light sensitive substance which under the action of light causes an alkaline reaction in the tropochromic layer.
  • a tropochromic coating consisting of an organic substance containing available sulfur, a metal salt which in the presence of free sulphur ions forms a visible sulfide, and a light sensitive substance which causes the mixture to yield a colored sulfide where light has acted.
  • a light sensitive coating consisting of lead acetate, thioacetamide and hexamino cobaltic chloride.
  • a light sensitive coating consisting of aquo pentamino cobaltic chloride, thioacetamide, and lead acetate.
  • a light sensitive coating consisting of thioacetanilide, lead acetate, and hexamino chromic chloride.
  • a light sensitive tropochromic coating comprising aquo pentamino cobaltic chlo ride, thioacetamide and a metal salt which in the presence of free sulfur ions forms a metal sulfide.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Color Printing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Description

Patented Feb. 14, 1933 1,&97,843
KENNETH G. I). HICKMAII AND LUDV-JIG- A. STATE, (II-L, 0F ROCHESTER, NEW YORK,
ASSIGNORS TO EASTMAN KGIDAK COMPANY, OF RUCHESTER, NEEV YORK, A CORPO- BATION OF NEW YORK LIGHT SENSITIVE TROPOCHROMIC COATING- No Drawing.
This invention relates to tropocl 'omic coatings, and in particular to tropochromic coatings which are sensitive to light.
The object of this invention is to provide improved sensitivity and particularly light sensitivity in paper and other supports coated with tropochromic mixtures of the kind disclosed in our co-pending application, Serial No. 473,784, filed August 7, 1930.
The term tropochromic is used throughout this specification to denote any layer containing substances which have an in herent ability to change color when suitably stimulated. Tropochromic layers are well known, and in fact, most photographic reproducing materials have light sensitive tropochromic layers. The word tropochromic is used to denote the ability to change color and does not specify the kind of stimulus, whether light, heat, electricity, or chemical environment, which induces the change.
The tropochromic coatings referred to in our co-pending application consist of an organic substance capable of yielding a sulfide-ion and a metal salt capable of yield ing a colored metal sulfide.
We have found that the reaction between such an organic compound and such a metal salt is very sensitive to changes of pH. In general, the substances do not react in acid solution but they form the colored sulfide when the solution becomes alkaline. Coated layers maintained slightly acid remain substantially colorless. whereas coated layers rendered alkaline soon darken from the formation of sulfide.
As an example, we may cite the reaction between lead acetate and thioacetamide which takes place readily to produce lead sulfide in solutions slightly alkaline to litmus.
According to the present invention we incorporate with the organic sulfide-metal salt tropochromic layer, described in our said application, an additional substance which becomes more alkaline or liberates ammonia or an alkali under the action of Ho-ht.
'"D A niunber of these substances are known.
Serial No. 473,785.
Thus, it was discovered by Schway and Kronig, Berichte der Deutschen Chemischen Gesellschaft, 56, 211 (1923), that heXamino cobaltic chloride under the action of light decomposed, probably in the following manner:
Co(NH Cl,+3H OeCo(Ol-I) automat n We have found that when heXamino cobaltic chloride is added to a tropochromic layer consisting of thioacetainide and lead acetate the layer becomes very sensitive to light with the production of a brown image of lead sulfide where light has acted. Paper coated with such a mixture can be eX- posed under anegative or a line drawing and will yield an image which may be fixed with a short washing in water.
A satisfactory light sensitive paper has the following composition:
Gelatin 5% 40.0 c.c. Lead acetate 2.5 grams Thioacetamide -1 1.0 gram Hexamino cobaltic chloride 1.0 gram Gelatin 0.1 gram Lead acetate 2.5 grams Thioacetamide 1.0 gram Aquo pentamino cobaltic chloride- 1.0 gram li'ater 20.0 c. 0.
Certain chromariines are equally effective, not-ably hexamino chromic chloride which may be substituted for the cobaltic salt in the above formula.
Reference to the chemical literature shows that many of the complex metal amines, substituted amines, and their salts, are light sensitive, and can thus be used according to this invention. This invention considers within its scope the use of any compound which under the action of light becomes sufficiently alkaline to cause the darkening of tropochromic layers of the kind referred to in our co-pending application. The use of hexamino cobaltic chloride, aquo pentamino cobaltic chloride, and hexamino chromic chloride are shown by way of example only.
lVe consider as included within our invention all variations and equivalents coming within the scope of the appended claims.
hat we claim is:
1. A photographic support having a coating containing a salt of a metal which in the presence of free sulphur ions forms a colored sulphide, an organic compound capable of yielding a sulphide ion, and including a compound which under the influence of light yields a substance capable of promoting the reaction between the first two compounds to form a visible image.
2. A tropochromic coating consisting of an organic substance containing available sulfur, a metal salt which in the presence of free sulphur ions forms a visible sulphide, and a light sensitive substance which under the action of light causes an alkaline reaction in the tropochromic layer.
3. A tropochromic coating consisting of an organic substance containing available sulfur, a metal salt which in the presence of free sulphur ions forms a visible sulfide, and a light sensitive substance which causes the mixture to yield a colored sulfide where light has acted.
i. A light sensitive coating consisting of lead acetate, thioacetamide and hexamino cobaltic chloride.
5. A light sensitive coating consisting of aquo pentamino cobaltic chloride, thioacetamide, and lead acetate.
6. A light sensitive coating consisting of thioacetanilide, lead acetate, and hexamino chromic chloride.
7. A light sensitive tropochromic coating comprising aquo pentamino cobaltic chlo ride, thioacetamide and a metal salt which in the presence of free sulfur ions forms a metal sulfide.
Signed at Rochester, New York this 2nd day of August 1980.
KENNETH G. D. HIOKMAN. LUDWIG A. STAIB, JR.
US473785A 1930-08-07 1930-08-07 Light sensitive tropochromic coating Expired - Lifetime US1897843A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US473785A US1897843A (en) 1930-08-07 1930-08-07 Light sensitive tropochromic coating
US473784A US1880449A (en) 1930-08-07 1930-08-07 Tropochromic coating
DEK119544D DE632602C (en) 1930-08-07 1931-03-18 Light and radiation sensitive layer
FR730043D FR730043A (en) 1930-08-07 1931-08-06 Improvement in tropochromic plasters
FR730876D FR730876A (en) 1930-08-07 1931-08-06 Improvement in tropochromic light-sensitive plasters
GB22265/31A GB372637A (en) 1930-08-07 1931-08-06 Improvements relating to sensitive colour-changing coatings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US473785A US1897843A (en) 1930-08-07 1930-08-07 Light sensitive tropochromic coating

Publications (1)

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US1897843A true US1897843A (en) 1933-02-14

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US473785A Expired - Lifetime US1897843A (en) 1930-08-07 1930-08-07 Light sensitive tropochromic coating

Country Status (4)

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US (1) US1897843A (en)
DE (1) DE632602C (en)
FR (2) FR730876A (en)
GB (1) GB372637A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732299A (en) * 1952-07-22 1956-01-24 Light sensitive
US2740896A (en) * 1947-05-10 1956-04-03 Minnesota Mining & Mfg Method of using heat sensitive copying paper
US2934454A (en) * 1957-07-18 1960-04-26 Canadian Pittsburgh Ind Ltd Preparation of lead sulphide mirrors
US2967105A (en) * 1955-10-05 1961-01-03 Stupa Corp Photosensitive sheet
US2990881A (en) * 1957-12-03 1961-07-04 Texaco Inc Treating permeable underground formations
US3158506A (en) * 1961-09-11 1964-11-24 Graphic Controls Corp Recording materials and their manufacture
US3236651A (en) * 1964-02-24 1966-02-22 Alvin M Marks Photothermotropic compositions containing ligands and processes for utilizing same
US3266370A (en) * 1960-10-20 1966-08-16 Alvin M Marks Electro-thermo-phototropic compositions and apparatus
US4045221A (en) * 1975-09-08 1977-08-30 Eastman Kodak Company Process of amplifying image in image recording layer by releasing reactant from image forming layer containing cobalt(III)complex
US4171221A (en) * 1975-09-08 1979-10-16 Eastman Kodak Company High gain Co(III)complex imaging
US4195998A (en) * 1974-04-15 1980-04-01 Eastman Kodak Company CO(III) Complex containing radiation sensitive element with diazo recording layer
US4201588A (en) * 1974-04-15 1980-05-06 Eastman Kodak Company Radiation sensitive co(III)complex photoreduction element with image recording layer
US4314019A (en) * 1976-09-07 1982-02-02 Eastman Kodak Company Transition metal photoreduction systems and processes
US4954428A (en) * 1988-10-17 1990-09-04 Gaf Chemicals Corporation Coating for increasing sensitivity of a radiation imageable polyacetylenic film

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449153A (en) * 1944-04-03 1948-09-14 Urbach Franz Photographic silver bromide emulsion sensitized with cysteine
BE471336A (en) * 1946-04-13
US2627600A (en) * 1946-08-19 1953-02-03 Robert H Rines Method of and apparatus for producing visual likenesses with the aid of radio waves
US3158480A (en) * 1960-07-20 1964-11-24 Ibm Spark development of photosensitive vesicular print material
US4151748A (en) * 1977-12-15 1979-05-01 Ncr Corporation Two color thermally sensitive record material system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740896A (en) * 1947-05-10 1956-04-03 Minnesota Mining & Mfg Method of using heat sensitive copying paper
US2732299A (en) * 1952-07-22 1956-01-24 Light sensitive
US2967105A (en) * 1955-10-05 1961-01-03 Stupa Corp Photosensitive sheet
US2934454A (en) * 1957-07-18 1960-04-26 Canadian Pittsburgh Ind Ltd Preparation of lead sulphide mirrors
US2990881A (en) * 1957-12-03 1961-07-04 Texaco Inc Treating permeable underground formations
US3266370A (en) * 1960-10-20 1966-08-16 Alvin M Marks Electro-thermo-phototropic compositions and apparatus
US3158506A (en) * 1961-09-11 1964-11-24 Graphic Controls Corp Recording materials and their manufacture
US3236651A (en) * 1964-02-24 1966-02-22 Alvin M Marks Photothermotropic compositions containing ligands and processes for utilizing same
US4195998A (en) * 1974-04-15 1980-04-01 Eastman Kodak Company CO(III) Complex containing radiation sensitive element with diazo recording layer
US4201588A (en) * 1974-04-15 1980-05-06 Eastman Kodak Company Radiation sensitive co(III)complex photoreduction element with image recording layer
US4045221A (en) * 1975-09-08 1977-08-30 Eastman Kodak Company Process of amplifying image in image recording layer by releasing reactant from image forming layer containing cobalt(III)complex
US4171221A (en) * 1975-09-08 1979-10-16 Eastman Kodak Company High gain Co(III)complex imaging
US4314019A (en) * 1976-09-07 1982-02-02 Eastman Kodak Company Transition metal photoreduction systems and processes
US4954428A (en) * 1988-10-17 1990-09-04 Gaf Chemicals Corporation Coating for increasing sensitivity of a radiation imageable polyacetylenic film

Also Published As

Publication number Publication date
FR730043A (en) 1932-08-05
DE632602C (en) 1936-07-10
GB372637A (en) 1932-05-12
FR730876A (en) 1932-08-25

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