US895970A - Method of treating photographic paper. - Google Patents

Method of treating photographic paper. Download PDF

Info

Publication number
US895970A
US895970A US42600108A US1908426001A US895970A US 895970 A US895970 A US 895970A US 42600108 A US42600108 A US 42600108A US 1908426001 A US1908426001 A US 1908426001A US 895970 A US895970 A US 895970A
Authority
US
United States
Prior art keywords
print
photographic paper
sulfid
photographic
salt
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
US42600108A
Inventor
Edward Albert Cunningham
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US42600108A priority Critical patent/US895970A/en
Application granted granted Critical
Publication of US895970A publication Critical patent/US895970A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G03C1/64—Compositions containing iron compounds as photosensitive substances

Definitions

  • My invention relates to photographic paper and has for'its object the economical treatment of photographic paper, so that prints of any suitable color may be made,
  • I g V My invention isspecially adapted for the treatment of the paper used in what is known as the blue printing process, since by its application I am able to change the actinic blue color of the prints to a non-actinic color,
  • I treat the prints, after being washed, with a solution or solutions ofasalt of one or more of the elements, preferably of the double salts of cop per and potassium chlorid, thereby coating those portions of the prints which have been acted on by light.
  • the print is-then washed and transferred to a solution or solutions of at least one of the sulfide or thio-sulfates. preferably the sulfid of sodium, which changes the coating obtained by the first treatment into a sulfid of the element or elements used.
  • the print is then washed or dried in the usual manner.
  • the herein described method of treat ing photographic paper which consists in placing a photographic print in a solution containing salts of one of the metals, whereby said print 'is coated With-said saltsfand then treating said print with a solution which will change the deposited metal into a v sulfid.
  • photographic paper which consists in placing a photographic print in a solution containing a salt of copper, whereby saidprint is coated with said-sc opper andtransferring said print into a solution which will change the deposited copper into a sulfid.
  • the herein described method of treating photographic paper which consists in placing a photographic print in a solution containing a salt of one of the'metals, whereby said print is coated with said salt, washing said print, and inserting said print into a second solution containing a sulfid, whereby said sulfid acts on the coating on said print to change said salt in said coating into sulfid, and then Washing and drying the print.

Description

EDWARD ALBERT CUNNINGHAM, OF AMBRIDGE, PENNSYLVANIA.
METHOD or TREATING rnoroennrmc PAPER.
Specification of LettersPatent.
meanin 11, 1908.
Application filed April 9, 1908. Serial No. 426,001.
' T 0 all whom 'itmay concern:
Be it known that I, EDWARD ALBEl-t'l CUN- NINGHAM, of Ambridge, in the county of Beaver and State of Pennsylvania, have inventeda new and useful Method of Treating Photographic Paper, of which the following is a specification.
My invention relates to photographic paper and has for'its object the economical treatment of photographic paper, so that prints of any suitable color may be made,
and other prints made from those first treated. i
'A further object to providea cheap and efficient photographic paper which will be unaffected by sunlight and other climatic conditions. I g V My invention isspecially adapted for the treatment of the paper used in what is known as the blue printing process, since by its application I am able to change the actinic blue color of the prints to a non-actinic color,
In carrying out my invention I treat the prints, after being washed, with a solution or solutions ofasalt of one or more of the elements, preferably of the double salts of cop per and potassium chlorid, thereby coating those portions of the prints which have been acted on by light. The print is-then washed and transferred to a solution or solutions of at least one of the sulfide or thio-sulfates. preferably the sulfid of sodium, which changes the coating obtained by the first treatment into a sulfid of the element or elements used. The print is then washed or dried in the usual manner. If the double salts of copper are used in the coating treatmeni, then, whcnthc print is subsequently treatedby the sulfide or thi osulfates, the double salts of copper will accordingly be changed into sulfids ofcoppe l? Those skilled. 'I'nthe art may vary' the method of treatment described above without departing from the scope and spirit of my invention, since i.
What I claim is:
1. The herein described method of treat ing photographic paper, which consists in placing a photographic print in a solution containing salts of one of the metals, whereby said print 'is coated With-said saltsfand then treating said print with a solution which will change the deposited metal into a v sulfid.
ing photographic paper, which consists in placing a photographic print in a solution containing a salt of copper, whereby saidprint is coated with said-sc opper andtransferring said print into a solution which will change the deposited copper into a sulfid.
3. The hereln described method of treating photographic paper, which consists in placing a photographic print in a solution containing double salts of copper and potassium chlorid whereby the print is coated with said salt, and then subjecting said print to a solution which will change the deposited copper into a sulfid of copper.
4. The herein described method of treat- 2. The herein described iriethod of treat-- ing photographic paper, which consist in placing a photographic print in a soiulion containing a salt of one of the metals, where by said print is coated with said salts, and transferring said print into a solution containing a salt of sodium, wherebythe salt of the metal is changed into a sulfid.
5. The herein described method of treating photographic paper, which consists in placing a photographic print in a solution containing a salt of one of the'metals, whereby said print is coated with said salt, washing said print, and inserting said print into a second solution containing a sulfid, whereby said sulfid acts on the coating on said print to change said salt in said coating into sulfid, and then Washing and drying the print.
6. The herein described method of treat- Q ing photographic paper, which consists in immersing a photographic print ina solution containing the double salts of copper and po.
US42600108A 1908-04-09 1908-04-09 Method of treating photographic paper. Expired - Lifetime US895970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US42600108A US895970A (en) 1908-04-09 1908-04-09 Method of treating photographic paper.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42600108A US895970A (en) 1908-04-09 1908-04-09 Method of treating photographic paper.

Publications (1)

Publication Number Publication Date
US895970A true US895970A (en) 1908-08-11

Family

ID=2964397

Family Applications (1)

Application Number Title Priority Date Filing Date
US42600108A Expired - Lifetime US895970A (en) 1908-04-09 1908-04-09 Method of treating photographic paper.

Country Status (1)

Country Link
US (1) US895970A (en)

Similar Documents

Publication Publication Date Title
US3298852A (en) Metal offset plate and method for manufacture
US895970A (en) Method of treating photographic paper.
US2233573A (en) Coating composition for lithograph plates and method of applying the same
US1351071A (en) Recording device
US223873A (en) Process of autographic printing
US1225146A (en) Coating material for paper for photographic uses.
DE486964C (en) Process for avoiding so-called white spots on photographic developing paper
SU58982A1 (en) The method of dissolving silver sulfide
US1539993A (en) Impression metal
US916236A (en) Producing impressions on metal plates.
US337703A (en) Island
DE1914762A1 (en) Radiation-sensitive element
US917418A (en) Method of treating photographic paper.
US1544579A (en) Electrotype plate
US1998883A (en) Blue printing
US2197015A (en) Method and article for producing shaded designs
US1948604A (en) Process for the photochemical production of forms or patterns for planographic printing
US418675A (en) Direct-printed adhesive negative
US272575A (en) Xjohn m matthew moss
US1169520A (en) Stencil fabric and process of producing the same.
US1634659A (en) Photoprinting
US1656154A (en) Process of treating fouled enamel-removing solutions
SU711076A1 (en) Method of work up of writing chalk beams
US930578A (en) Compound for the treatment of photographic prints.
SU623174A1 (en) Method of making scale on electron-beam tube screen