US2334215A - Photographic tracing cloth - Google Patents

Photographic tracing cloth Download PDF

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Publication number
US2334215A
US2334215A US401768A US40176841A US2334215A US 2334215 A US2334215 A US 2334215A US 401768 A US401768 A US 401768A US 40176841 A US40176841 A US 40176841A US 2334215 A US2334215 A US 2334215A
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US
United States
Prior art keywords
cloth
gelatin
layer
waterproofing
layers
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
US401768A
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English (en)
Inventor
Gale F Nadeau
Carl F Smith
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
Original Assignee
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
Priority to FR956671D priority Critical patent/FR956671A/fr
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US401768A priority patent/US2334215A/en
Application granted granted Critical
Publication of US2334215A publication Critical patent/US2334215A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/7642—Photosensitive materials characterised by the base or auxiliary layers the base being of textile or leather

Definitions

  • This invention relates to a'material on which tracings and drawings may be reproduced pho-
  • the method we use is to coat a sized cloth base I on both sides with a solution of gelatin and celtographically and more-particularly to a simplified method for producing said material.
  • Photographic tracing cloth consists of a sheet of sized tracing cloth which is waterproofed on both sides to prevent aqueous photographic solutions from attacking the sizing of the cloth, a photographic light sensitive layer being coated over one or both of the waterproofing layers.
  • the waterproofing layers consist of a cellulosic material such as cellulose nitrate, which material does not properly adhere to a starch-sized cloth without the application of some intermediate subbing material.
  • the waterproofing layers may come loose and permit the water to reach and swell the starch sizing of the cloth, thereby making the drawing or tracing useless.
  • Another objection to tracing cloth which is made in this way is that after photographic processing and drying of the material, the waterproofing layer and its emulsion sometimes peel or strip from the cloth base.
  • the principal object of the present invention is to provide a method for overcoming the difficulties of complicated manufacture by the prior art methods, and to provide a photographic tracing cloth having superior qualities.
  • the objects are accomplished by preparing a material having fewer layers than the prior art product, and relatively thick waterproofing layers of gelatin and a cellulose ester; on each side of a sized cloth base.
  • the objects are accomplished in other ways described hereinafter.
  • Fig. 1 of the accompanying drawing is a sectional view of the material prepared according to the method of the prior art cited.
  • Fig. 2 is a sectional view of the material prepared in the manner of the present invention.
  • lulose ester of such consistency that a relatively thick coating is obtained.
  • a layer of gelatin or a cellulose ester such as cellulose acetate, to the other side of the base to control curl.
  • i represents the calendered starchsized tracing cloth base on which have been coated layers 1, consisting of gelatin and cellulose nitrate, from a solution of the following composition:
  • the cellulose nitrate used in the solution is preferably a highly alcohol soluble low vsicosity nitrate.
  • a suitable composition would be one which had an ethyl alcohol solubility of 30-100%, a viscosity of 2 to 5 seconds by the dropping ball method" and a nitrogen content of 11 to 12%.
  • This composition is given merely as an example, nitrates of diflerent compositions being also suitable.
  • the nitrogen content in particular, may be higher or lower than that of the example stated above.
  • the preferred proportion of gelatin to cellulose nitrate in the solution is 1 to 4; although a ratio of 1 to 3 gives fair results. A ratio of 1 to 2 gives very poor results.
  • the concentration of the gelatin and cellulose nitrate in the solution is a very critical factor also. We have found that when the concentration of these materials is as low as 2.4%, layers I do not adequately waterproof the tracing cloth. A concentration of approximately 4% gives fairly satisfactory results and higher concentrations such as 5-7% and higher, impart superior qualities to the element, since layers of the required thickness may be coated from solutions of such concentrations.
  • Another feature which cooperates with the concentration of solution to give a superior product- is the ratio of the gelatin to cellulose nitrate.
  • the preferred ratios are not sufiicient, per se, to impart 'thequalities we desire, but in combinat on with the preferred solid concentration of the coating solutions, superior qualities are obtained.
  • Fig. 2 has a more simple structure, and it has all the advantages the waterproofing layers 3 of the prior art element; are not present, and their function is now s rved by the relatively thick layers 1 of gelatin and cellulose nitrate.
  • an emulsion layer 5 of the desired sensitivity is coated in a well known manner.
  • cellulose nitrate we may use other cellulose esters in the waterproofing layers 1, e. g., hydrolyzed esters, such as, cellulose acetate (precipitation value, 70%).
  • hydrolyzed esters such as, cellulose acetate (precipitation value, 70%).
  • cellulose acetate precipitation value, 70%
  • a sulliciently concentrated dope solution of these esters that a waterproofing layer of adequate thickness (of the order of .0005.002 in. or more) is obtained.
  • the ratio of elatin to these cellulose esters is also regulated to obtain the desired adhesion of the waterproofing to the cloth, and to simultaneously impart the desired clarity and waterproofing characteristics.
  • precipitation value is defined as described in the patent above cited and refers to a means for classifying cellulose ester according to their. degree of hydrolysis.
  • the support may be any type of tracing cloth or tracing paper which has been sized with materials that swell or dissolve in water.
  • Other materials may be used for the waterproofing layer and additional layers of 1 sized cloth base, a single waterproofing layer of gelatin and cellulose ester at least .0005 inch thick and containing at least 7 5 per cent cellulose ester, and a light sensitive layer over the waterproofing layer.
  • a light sensitive tracing cloth comprising a sized cloth base, a single waterproofing layer of gelatin and cellulose ester at least .0005 inchthick and containingat least 75 per cent cellulose ester on both sides of the base. and a light sensi tive layer over one of, the waterproofing layers.
  • a light sensitive tracing cloth comprising a sized cloth base, a single waterproofing layer of gelatin and cellulose nitrate at least .0005 inch thick and containing at least 75 per cent cellulose nitrate on both sides of the base, and a light sensitive layer over one of' the waterproofing layers.
  • a light sensitive tracing cloth comprising a sized cloth base, asingle waterproofing layer of gelatin and cellulose nitrate at least .0005 inch thick andcontaining at least 75 per centv cellulose nitrate on both sides of the-base, a gelatin layer over oneofthe waterproofing layers, a lightsensitive layer over the gelatin layer, and a cellulose acetate layer over the other waterproofing layer,
  • a light sensitive tracing cloth comprising a sized cloth base, a single waterproofing layer of gelatin and cellulose nitrate .001 inch thick and containing at least 75 per cent cellulose nitrate on both sides of the base, a gelatin layer over one of the waterproofing layers, a li htsensitive layer over the gelatin layer, and a cellulose acetate layer over the other waterproofing layer.
  • a light sensitive tracing cloth comprising a sized cloth base, a single waterproofing layer of gelatin and cellulose nitrate .001 inch thick and containing per cent cellulose nitrate on both sides of the base, a gelatin layer over one of the waterproofing layers, a light sensitive layer over the gelatin layer, and a cellulose acetate layer over the other waterproofing layer.
  • a process of making a light sensitive tracin cloth which comprises coating a sized cloth with a single waterproofing layer of gelatin and a cellulose ester from a solution depositing a layer at least .0005 inch thick and containing at least '15 per cent cellulose ester, and applying a light sensitive layer over said waterproofing layer.
  • a process of making a light sensitive tracing cloth which comprises coating a sized cloth on both sides with a single waterproofing layer of gelatin and cellulose ester from a solution depositing layers at least .0005 inch thick containing at least '15 per cent cellulose ester, and applying a light-sensitive layer over one of said waterproofing layers.
  • a process of making a light sensitive tracing cloth which comprises coating -a sized cloth on both sides with a single waterproofing layer of gelatin and cellulose nitrate from a solution depositing layers at least .0005 inch thick containing a at, least 75 per cent ,cellulose nitrate, and applying a light sensitive layer over one of said waterproofing layers.
  • a process of making a light sensitive tracmg cloth which comprises coating a sized cloth on both sides with a single waterproofing layer of gelatin and cellulose nitrate from a solution on both sides with a single waterproofing layer of gelatin and cellulose nitrate from a solution depositing layers .001 inch thick containing at least per cent cellulose nitrate, applying a gelatin layer over one of the waterproofing layers, applying a light sensitive layer over the gelatin layer, and applying a cellulose acetate layer over the waterproofing layer on the other side of the cloth.
  • a process of making a light sensitive tracing cloth which comprises coating a sized cloth on both sides with a single waterproofing layer of gelatin and cellulose nitrate from a solution depositing layers .001 inch thick containing per cent cellulose nitrate, applying a gelatin layer over one of the waterproofing layers, applying a light sensitive layer over the gelatin layer, and applying a cellulose acetate layer over the waterproofing layer on the other side of the cloth.
  • GALE F NADEAU. CARL F. SMITH.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Laminated Bodies (AREA)
US401768A 1941-07-10 1941-07-10 Photographic tracing cloth Expired - Lifetime US2334215A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR956671D FR956671A (ja) 1941-07-10
US401768A US2334215A (en) 1941-07-10 1941-07-10 Photographic tracing cloth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US401768A US2334215A (en) 1941-07-10 1941-07-10 Photographic tracing cloth

Publications (1)

Publication Number Publication Date
US2334215A true US2334215A (en) 1943-11-16

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ID=23589153

Family Applications (1)

Application Number Title Priority Date Filing Date
US401768A Expired - Lifetime US2334215A (en) 1941-07-10 1941-07-10 Photographic tracing cloth

Country Status (2)

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US (1) US2334215A (ja)
FR (1) FR956671A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592368A (en) * 1947-11-04 1952-04-08 Eastman Kodak Co Gelatine silver halide emulsion layer containing a dihydroxy diphenyl tanning developing agent
US2835578A (en) * 1955-10-31 1958-05-20 Eastman Kodak Co Light-sensitive photographic paper containing an ethenone material
US2848327A (en) * 1953-02-19 1958-08-19 Screen Engineering Co Glass fabric resin impregnated base coated with a light sensitive layer
US2874046A (en) * 1955-06-25 1959-02-17 Agfa Ag Process for the retreatment of foils consisting of highly polymeric substances for the application of hydrophilic colloids
US3072482A (en) * 1958-01-10 1963-01-08 Keuffel & Esser Co Subbed photographically sensitive film element
US6187518B1 (en) * 1998-10-23 2001-02-13 Eastman Kodak Company Backing layers with reduced scum formation for photographic films

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592368A (en) * 1947-11-04 1952-04-08 Eastman Kodak Co Gelatine silver halide emulsion layer containing a dihydroxy diphenyl tanning developing agent
US2848327A (en) * 1953-02-19 1958-08-19 Screen Engineering Co Glass fabric resin impregnated base coated with a light sensitive layer
US2874046A (en) * 1955-06-25 1959-02-17 Agfa Ag Process for the retreatment of foils consisting of highly polymeric substances for the application of hydrophilic colloids
US2835578A (en) * 1955-10-31 1958-05-20 Eastman Kodak Co Light-sensitive photographic paper containing an ethenone material
US3072482A (en) * 1958-01-10 1963-01-08 Keuffel & Esser Co Subbed photographically sensitive film element
US6187518B1 (en) * 1998-10-23 2001-02-13 Eastman Kodak Company Backing layers with reduced scum formation for photographic films

Also Published As

Publication number Publication date
FR956671A (ja) 1950-02-02

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