DE1597594A1 - Process for making a photographic film - Google Patents

Description

PATENT ANWXLTE

DR, E. WIEGAND DIPL-ING. W. NIEMANN DR. M. KÖHLER DIPL-ING. C. GERNHARDT

MÖNCHEN HAMBURG 1 5 3 7 O O 4

Dec. 22, 1967

PHONE; 555476 8000 MÖN CHEN 15,

TELEGRAMS: KARPATENT NUSSBAUMSTRASSE 10

Wo 13 475/67 13 / ko

■ Fuji Shashin film Kabushiki Kaisha Kanagawa (Japan)

Process for making a photographic Films

The invention relates to a process for preparing a photographic film ₀ In the conventional photographic film is a negative - or intermediate coating of gelatin or certain polymer j of the properties is not affected of a photosensitive material and other materials and hydrophilic, necessary to obtain a Bringing emulsion layer using gelatin as a binder and water as a solvent in tight 'contact with a hydrophobic support member. However, the creation of such a basic

BATH ORIGINAL

009119/158;

Coating layer not only to an increase in the manufacturing steps of a photographic film, but also to an increase in the drying time and the limitation on the coating speed, _{or the like}

A primary purpose of the invention is to provide a method of making a photographic film without the need for a base or intermediate coat

Research has been carried out to overcome such drawbacks, and the particular method according to the invention has been found, the features of which are explained in more detail below, _etc.

According to the invention there is a method of manufacturing of a photographic film which is characterized by using the photographic film a hydrophobic carrier, dispersing an emulsion in an organic solvent, and then Applying the same to the carrier produces.

As used herein, photographic film, comprises all of the films using a hydrophobic carrier, such as ₀ A photographic film, paper photοgraphisches, Diffusionsubertragungsfilm, Diazokopierfilm and photosensitive polymer film *

009819/1584

The organic solvent can be selected from such which each have a caustic ability, e.g. acetone, Methyl ethyl ketone, methylene chloride, ethylene chloride and cyclohexanones ■ '■ ■

Carriers are those of the cellulose, vinyl, ficryl and styrene resin type used

Alcohols such as methyl alcohol and ethyl alcohol are considered Diluents are used and acidic materials such as salicylic acid, acetic acid and boric acid are used as a dispersion aid used for the emulsion

In Lall the use of a carrier which is relatively soluble in an organic solvent, _e B "cellulose, vinyl, acrylic or styrene resin, which use results in an organic solvent with an etch with respect to the polymer in the elimination of the base or between the coating layer It is a film without an intermediate or undercoat layer as shown in Fig. 2 of the drawings obtained by directly coating the support. Fig. 1 of the drawings illustrates the conventional photographic film comprising a support member 1, an undercoat layer 2 and an emulsion layer 3 includes. ₀ 2 shows the photographic film according to the invention comprising a support member 1 and an emulsion layer 3 o.

009819 / 1S8A

Moreover, the invention reach almost the method according to a an intermediate or undercoat layer having carrier for application, such as ₀ to a support of a to organic solvents relatively resistant resin such as polyester-j polypropylene or Polycarbonatharzo The drying can be shortened so that a long loop drying, which was used in the emulsion application according to the prior art, is out of use, namely a drying zone of at most several meters The photographic film thus obtained is in no way inferior to the conventional photographic film using a round or intermediate coating agent with respect to various properties.

The invention is explained in more detail below with the aid of examples, in which all specified ratios or parts by weight are o

example 1

25 parts of silver halide were made into a solution 2 parts of salicylic acid, 1Ό parts of methylene chloride, 70 parts Dispersed acetone and 30 parts of methanol and applied to a film of cellulose triacetate and dried.

009819/1584

The drying speed was reduced to 1/20 of the duration of the previous technique. The FiIm thus obtained was exposed to _"f and develops the photographic characteristics in any way to those of the gewähnlichen

inferior
photographic film * were.

Example 2

An emulsion for a diffusion transfer positive film having the composition given below used:

Parts

Diffusion transfer cores 10

(colloid-dispersed in aqueous gelatin)

Gelatin 5 '

Salicylic acid 1

Water 8

Development agent low minge

(Micromount;

Hardener small amount

Xiäikromenge)

Methyl alcohol 40

Acetone 60

The emulsion was coated on a paper sheet in the usual manner and dried below 100 ⁰ C to form a diffusion transfer Positivf! Immaterial, which was coated with Oarboxymethylaellulose yield. The drying rate was about 1/20 that of the prior art and the effective emulsion time was about twice that.

BATHROOM OFMGINAL

000019/1584

Example 3

25 parts of a silver halide emulsion were dissolved in a solution of 2 parts of salicylic acid, 70 parts of acetone, 30
Parts of methanol and 1 part of titanium oxide dispersed as
Coating applied to a transparent film of cellulose triacetate and dried to give a white PiIm
became. The film thus obtained was used as a substitute for conventional copier paper. This film had such advantages that the water wash time within the
Range was up to 5 minutes, the drying time was short and no discoloration due to the passage of time and none
Eindrehänderung available due to moisture were _o

009819/1584

Claims (1)

Claim A process for producing a film photοgraphischen, characterized in _t that a hydrophobic carrier, dispersing an emulsion in an organic solvent and applying subsequently produced photographic film using the carrier 8AD ORiGINAt QQ9819 / 1S84