Note: Descriptions are shown in the official language in which they were submitted.
10478Z0
This invention relates to the art o~ photography and
particularly to photographic elements, such as color diffusion
transfer elements, employing oxidizing agents.
Color diffusion transfer processes generally involve
the use of a photographic element comprising a support, at least
one silver halide emulsion, and an image dye-providing material
which is contained in or contiguous said layer. After exposure,
such a photographic element is treated with an alkaline process-
ing solution to erfect imagewise discrimination in the element.
As is well-known in the art, the dye-providing material can be
initially immobile or initially mobile in the processing solu-
tion. Upon alkaline processing of an initially immobile dye-
providing material, a mobile dye or dye precursor can be
released imagewise or the material can be imagewise rendered
mobile. If the material is initially mobile, the processing
solution typically renders the material insoluble (and thus
immobile) in an imagewise fashion. Whether initially mobile or
immobile, upon treatment with a processing solution the dye-
providing material typically is oxidized under alkaline condi-
tions, thereby producing imagewise discrimination in the ele-
ment.
~ xemplary color diffusion transfer processes are those
using developing agents as disclosed in U.S. Patents 2,698,798
and 2,559,643 wherein a latent silver halide image is developed
with a color-developing agent. As development proceeds, the
color-developing agent reduces the exposed silver halide to
metallic silver and the color-developing agent which is oxidized
as a function of development forms an immobile species while the
unoxidized color-developing agent is free to migrate to a
receiving element. After migration, the color-developing agent
in the receiver is oxidized. The oxidized developing agent then
~'
-2- ~
782(~
self-couples or couples ~;~ith a co]or coupler to form a positive
dye image.
A more rccent example of' a photographic process in
~hich oxidation causes formation of an image dye is described by
I,cstlna and L3ush in l~elgian J'atent 792,59~, entitled "l'hoto-
graphic ~lements Containin~ Oxichromic Compounds". Those oxi-
chromic compounds are ones which undergo chromogenic oxidation
to form a ne~ chromophore. Useful materials of that type are
oxichromic compounds which contain a developing moiety and an
oxichromic moiety and have the general formula D-(OC), wherein
D- is a group wllich is a silver halide developer such as a
hydroquinone moiety and (OC) is a moiety which undergoes chromo-
genic oxidation to form an image dye. These oxichromic com-
pounds are particular]y useful in an image-transfer unit format
in which the respective initially diffusible oxichromic com-
pounds or the initially nondiffusible compounds are used in com-
bination with the appropriate silver halide emulsions.
In order to achieve optimum results when using such
oxichromic compounds, it is desirable to have an oxidant which
has no substantial absorption in the visible spectrum (i.e.,
colorless) and which can be easily incorporated in a photo-
graphic element with good stabillty. The oxidative conversion
of oxichromic compounds or of other color-providing materials is
necessary in order to achieve color image formation. Accord-
ingly, there is a continuing need in the art for materials which
exhibit suitable oxidation capability.
I have found a class of oxidants well-suited for use
in color diffusion transfer color elements and in any other pho-
tographic element in which an oxidant is a necessary or desira-
~le in~redient. I~hen used in photographic elements containing
:: \
10478Z0 ..
certain oxichromic compounds, the oxidant readily oxidizes theoxichromic moiety.
Generally, the photographic elements of this invention
comprise a support and at least one layer thereon containing an
iodoso compound or an iodoxy compound of the formula R-Q wherein
Q is an iodoso group which contains an iodine atom and an oxygen
atom or Q is an iodoxy group including iodoxy derivatives, i.e.,
such as iodoxy diacetates, and R is a carbocyclic or heterocy-
clic group containing from 5 - 7 atoms i~ the cyclic moiety
and wherein the iodine atom of Q is covalently bonded to a car-
bon atom in said cyclic group. Preferabl~, R comprises an aro-
matic group covalently bonded through a carbon atom to the
iodine atom in Q. These iodoso and iodoxy compounds can be
incorporated in photographic elements as oxidants with reduced
danger of explosion which is associated with closely related
compounds such as periodates, and with better control of where
oxidation occurs during processing.
In one highly preferred embodiment, the photographic
elements of this invention contain iodoso compounds of the for-
20 mula:
I=0
,'C`c_x
~Z~ ' , -
wherein X is a carboxylic acid group, a sulfonic- acid group and
the like, and Z represents a group containing the atoms neces-
sary to form a 5- to 7-membered ring with the remainder of said
atoms of said formula.
In another highly preferred embodiment, the photo-
graphic elements of this invention contain iodoxy compounds hav-
ing the formula:
--4--
_~ . ...
~47820
cv.
~ , .
wherein Q represents an iodoxy group which can be the group
-I-02 or is preferably an iodoxy derivative, for example, an
iodoxy diacetate such as an iodoxy ethyl diacetate, an iodoxy
propyl diacetate, an iodoxy methyl diacetate, an iodoxy maleate
and the like, and Z represents a group containing the atoms nec-
essary to form a 5- to 7-membered carbocyclic or heterocyclic
ring with the carbon atom as shown in the formula.
In one highly preferred embodiment of this invention,
the iodoso compound or iodoxy compound contain a group thereon
which is sufficiently large to render the compound substantially
nondiffusible in the photographic element. Typically, ballast
groups which are useful are aliphatic groups containing at least
8 carbon atoms.
The iodoso compounds and iodoxy compounds which give
particularly good results in the practice of this invention can
be characterized in terms of their polarographic halfwave poten-
tials, i.e., their oxidation or reduction potentials as deter-
mined by polarography. Cathodic measurements of the reduction
potential can be made with-a solution of the iodoso compound or
iodoxy compound, typically in a basic solvent such as potassium
hydroxide, using a dropping mercury electrode with the polaro-
graphic halfwave potential for the most positive wave being des-
ignated Ec. In each measurement, the reference electrode is a
standard calomel electrode. Electrochemical measurements of
this type are known in the art and are described in New Instru-
mental Methods in Electrochemistry, by Delahay, Interscience
Publishers, New York, New York, 1954; Polarography, by Kolthoff
and Lingane, 2nd Ed., Interscience Publishers, New York, New
York, 1952; Analytical Chemistry, 36, 2426 (1964) by Elving, and
~)47820
Analytical Chemistry, 30, 1576 (1958) by Adams. Plus amd minus
signs are according to IUPAC (International Union of Pure and
Applied Chemistry), Stockholm Convention, 1953. Useful com-
pounds should have a polarographic reduction potential which is
more positive than the polarographic oxidation potential o~ the
ingredients to be oxidized. In general, useful compounds
inelude those having a polarographic reduction potential more
positive than about -0.5 v. Typical iodoso compounds or iodoxy
~ompounds for use in oxiehromie proeesses, as described by
Lestina and Bush in Belgian patent 792,598 mentioned above, are
those having a reduetion potential, Ec, between about -O.l and
-0.5 Y.
Typieal useful iodoso eompounds are as follows:
CH3COO-I-OCOCH3
Compound I ~ ¦
I=O OH
~o~e- ~l 7 ~J - COO ~ ~ic,
I=O O
Compound 3 C15H31 ~ ~ C-OH
I(OCCH3)2 .
Compound 4 1 ,, _
NHCCHO ~ \\
C H \~
I(OCC81ll7)2
cOmpOUnd~ J~i 1
-6-
1()47820
- o -
I(OCC2H5)2
Compound 6 ~'~
NHC(CH2)5 2
Compound 7~ /0-C-CH2
b-C -CH2
o
- The iodoso and iodoxy compounds can generally be pre-
pared by methods known in the art. Generally, the iodoxyarylene
diester compounds can be prepared by taking the respective
iodoxyarylene dichlorides prepared according to Organic ~ynthe-
sis, Vol. 22, John Wiley and Sons, 1942, pp. 69-72, and reacting
them with the appropriate acid to yield the diester as described
in J. Chem. Society, 1970, pp. 862-864. The iodoxy compounds
containing the iodine atom in a heterocyclic ring can also be
prepared as described in the latter publication.
The oxidants described herein can be used in a wide
variety of photographic elements or in photographic film units.
In certain embodiments, the oxidants can be used in
photographic elements or film units to provide an oxidant for
the synthesis of image dyes. The oxidants can be used to gener-
ate oxidized color-developing agent which then reacts with a
color coupler to form the image dye. Additionally, these com-
pounds can be used to oxidize a compound directly to an image
dye as in the case of leuco indoanilines, leuco indophenols,
leuco triarylmethanes and other dye precursors.
In one embodiment, the present oxidants are useful in
color diffusion transfer processes such as those in which unre-
acted color formers in undeveloped or partially developed areas
1~78Z~
of a photographic element diffuse imagewise, after color devel-
opment of the exposed layers, to a receiving layer in which the
color formers react with oxidized color developer to produce an
imagewise distribution of dye. By including a useful oxidant in
the receiving layer or having it in association therewith, dyes
are formed imagewise in that element as a result of the interre-
action of the oxidant, color developer and diffused color
former. Processes of this type are described further in British
Patent 926,462 dated May 15, 1963.
Examples of processes in which an image is formed upon
oxidation of transferred color developer and color coupler are
described in U.S. Patents 2,559,293 and 2,698,798. Similarly,
the present oxidants can be used in imaging processes based on
leuco anthraquinones and other dye precursors which produce dyes
when oxidized, or processes based on developers which self-
couple upon oxidation, thereby producing dyes. Processes of
these latter types are described further in U.S. Patents
2,892,710 and 2,698,798, respectively. Likewise, the described
oxidants have utility in color diffusion transfer processes
20 using a leuco developing agent, as discussed in U.S. Patents
2,992,105 and 2,909,430.
In another embodlment, the oxidants can be used to
oxidize the developer portion of a dye developer (i.e., a com-
pound which contains a silver halide developing moiety and a
separate moiety which contains the chromophore of an image dye).
As mentioned above, the oxidants selected must have an oxidation
potential sufficient to oxidize the developer portion of the
molecule, such as the hydroquinone portion. In this embodiment,
the oxidant can function to immobilize the dye developer, such
30 as when it diffuses to the receiver layer, by forming the qui-
none, quinonimide, etc., of the developer moiety which is gener-
ally quite insoluble in an alkaline processing solution.
1~7820
~ n still other embodiments, a photographic element
containing an oxidant can be treated to ~orm an imagewise dis-
tribution of the oxidant. The photo~raphic element can then be
contacted ~ith a material ~hich will undergo oxidation to pro-
duce an image record in the photographic element. Also, the
photographic elcment containing the imagewise distribution of
oxidant can be treated to effect di~fusion o~ the oxidant to an
adjacent layer wherein it can oxidize materials to produce an
image record. In one example of this embodiment, a photographic
element containing a silver halide emulsion and an adjacent
layer containing a nondiffusible iodoso or iodoxy oxidant can be
developed with a silver halide developer. Where silver halide
is not developed, the oxidant ~7ill be reduced. The element can
then be contacted with a solution of color coupler and color
developer to react with the remaining image~7ise distribution of
the described oxidant and produce an image dye
The o~id~rl~s ~r ~his irlvention are paï ticula-l^ly -~ell-
suited for use as oxidants in photographic elements or film
units ~hich contain an oxichromic compound of the type described
in Belgian Patent 792,598 by Lestina and Bush, mentioned above.
Preferred oxichromic compounds are those which undergo chromo-
genic oxidation to form a photographic image dye In one
embodiment, the oxidants of this invention are incorporated into
pho'ographic elements containing oxichromic compounds of the
formula:
D-(COUP)-N-Ar-J
~:herein (COUP) is a photographic color coupler linked to the
nitrogen atom through a carbon atom at the coupling position,
such as a phenolic coupler~ a pyrazolone coupler, a pyrazolotri-
azolc coupler, couplers having open~chain ketomethylene groups
_9_
' ' ~
~471~ZO
and the like; Ar is an arylene group containing from 6-20 carbon
atoms, including substituted and unsubstituted arylene groups,
fused-ring arylene groups and the likej J can be an amino group,
including substituted amines, an hydroxyl group or the group:
-O-C-R
in which R2 is a group containing from 1-12 carbon atoms, which
can be an alkyl group, an aryl group, including a substituted
alkyl group, a substituted aryl group and the like; Rl is a
hydrogen atom or the group:
o
-C-R
in which R2 is as defined above and is preferably a polyhalo-
genated alkyl group; and D is a group which is (1) a silver hal-
ide developing agent which is preferably an aromatic group poly-
substituted with hydroxy, amino or substituted amino groups or
(2) an oxidizable releasing group (i.e., a group which can be
oxidized to facilitate subsequent release of a group or a group
which can be oxidized to prevent the normal release of a group
under the processing conditions). When D is a silver halide
developing agent, the resultant compound preferably is initially
mobile. When D is an oxidizable releasing group, the resultant
compound preferably is initially immobile.
In still another embodiment, the oxidants of this
invention can be used in photographic elements where leuco com-
pounds are employed which provide anthraquinone dyes upon oxida-
tion. The leuco compounds can be of the type mentioned in U.S.
Patent 2,892,710 issued June 30, 1959, or they can also be
improved compounds such as leuco anthraquinone compounds
attached to hydroquinone moieties, for example, the compound:
--10--
~7~2~
CH3
OH OH N-CH2-CH2-~
\t/ \H \~
H2OH
OH OH N-CH2-CH2-
CH3\~
0~
Typically, the present oxidants are used in either the
processing fluid or the image-receiving layer of a dif'f'usion
transfer film unit employing other image dye-providing materials
mentioned above. The image-transf'er film units can be any of
those described in the following patents: U.S. Patents 2,543,181,
2,983,606, 3,227,550, 3,227,552, 3,415,644, 3,415,645, 3,415,646
and 3,635,707, Canadian Patent 674,082, and Belgian Patents
757,959 and 757,960, both issued April 23, 1971.
When used in the processing fluid of various color
diffusion transfer film units, the iodoso compounds or iodoxy
compounds are typically present in solution in a concentration
of about 0.01 to about 0.1 molar. When not contained in the
processing fluid~ the present oxidants are coated in at least
one layer which typically contains a binder such as gelatin,
poly(vinyl alcohol), etc. Of course, the oxidants described
herein can also be one of several ingredients as a given layer.
~or example, when used in color diffusion transfer units, the
described oxidant can be contained in a mordant layer. In gen-
20 eral, the iodoso compounds or iodoxy compounds are coated at a
7820
coverage of about 4 to 54 mg/dm2. In preferred emhodiments,
the iodoso compounds and iodoxy compounds are used in image-
transfer film units which are designed to be processed with a
single processing solution, and the resulting positive image is
viewed through a transparent support against an opaque back-
ground, preferably where all of the silver halide recording lay-
ers and the image-receiving layer remain laminated between two
dimensionally stable supports after processing.
A suitable image-transfer film unit in which the pres-
.ent oxidants are useful typically comprises:
1) a photosensitive element comprising a support hav-
ing thereon at least one layer containing a silver halide emul-
sion having associated therewith an image dye-providing material
and preferably at least three of said layers wherein one layer
- . contains`a blue-sensitive silver halide emulsion, one layer con-
tains a green-sensitive silver halide emulsion, and one layer
contains a red-sensitive silver halide emulsion;
2) an image-receiving layer which can be located on a
separate support superposed or adapted to be superposed on said
photosensitive element or, preferably, which can be positioned
in the photosensitive element on the same support adjacent the
photosensitive silver halide emulsion layers; and
3) means containing an alkaline proc~sing composi-
tion adapted to discharge its contents within said film unit.
Where the receiver layer is coated on the same support with the
photosensitive silver halide layers, the support is preferably a
transparent support, an opaque layer is preferably positioned .
between the image-receiving layer and the photosensitive silver
halide layer, and the alkaline processing compositi.on preferably
contains an opacifying substance such as carbon or pH-indicator
dye which is discharged into the film unit between a dimension-
ally stable support or cover sheet and the photosensitive ele-
, -12-
- 1~4782~
ment. In certain embodiments, the cover sheet can be superposed
or adapted to be superposed on the photosensitive element7 The
image-receiving layer can be coated on the cover sheet. In cer-
tain preferred embodiments where the image-receiving layer is
located in the photosensitive element, a neutralizing layer is
located on the cover sheet.
The means for containing the alkaline processing solu-
tion can be any means known in the art for this purpose, includ-
ing rupturable containers positioned at the point of desired
discharge of its contents into the film unit and adapted to be
passed between a pair of juxtaposed rollers to effect discharge
of the contents into the film unit, frangible containers posi-
tioned over or within the photosensitive element, hypodermic
syringes, and the like.
The silver halide emulsions useful in my invention are
well-known to those skilled in the art and are described in
Product Licensing Index, Vol. 92, December3 1971, publication
9232, p. 107, par. I, "Emulsion types"; they may be chemically
and spectrally sensitized as described on p. 107, par. III,
"Chemical sensitization", and pp. 108-109, par. XV, "Spectral
sensitization", of the above article; they can be protected
against the production of fog and can be stabilized against loss
of sensitivity during keeping by employing the materials
described on p. 107, par. V, "Antifoggants and stabilizers", of
the above article; they can contain development modifiers, hard-
eners and coating aids as described on pp. 107-108, par. IV,
"Development modifiers", par. VII, "Hardeners", and par. XII,
"Coating aids", of the above article; they and other layers in
the photographic elements used in this invention can contain
plasticizers, vehicles and filter dyes described on p. 108, par.
XI, "Plasticizers and lubricants", and par. VIII, "Vehicles",
and p. 109, par. XVI, "Absorbing and filter dyes", of the above
1~47820
article; they and other layers in the photographic elements used
in this invention may contain addenda which are incorporated by
using the procedures described on p. 109, para. XVII, "Methods
of addition", of` the above article; and they can be coated by
using the various techniques described on p. 109, para. XVIII,
"Coating procedures", of the above article.
Any material can be employed as the image-receiving
layer in this invention as long as the desired function of mor-
danting or otherwise fixing the dye images will be obtained.
The particular material chosen will, of course, depend upon the
dye to be mordanted. If acid dyes are to be mordanted, the
image-receiving layer can contain basic polymeric mordants such
as polymers of amino guanidine derivatives of vinyl methyl
ketone such as described by Minsk, U.S. Patent 2,882,156 issued
April 14, 1959, and basic polymeric mordants such as described
by Cohen et al, U.S. Patent 3,709,690 issued January 9, 1973.
Additional mordants include cationic mordants such as
polymeric compounds composed of a polymer having quaternary
nitrogen groups and at least two aromatic nuclei for each qua-
ternary nitrogen in the polymer cation (i.e., having at leasttwo aromatic nuclei for each positively charged nitrogen atom),
such polymeric compounds being substantially free from carboxy
groups. Useful mordants of this type are comprised of units of
the following formula in copolymerized relationship with units
of at least one other ethylenically unsaturated monomer:
R7
_ -CH--C-- ._
R (E)
R1 1--N~--R~ e
I G
R1 o
-14-
~.., ',
~47~3~0
~herein each of R7 an~ R8 represents a hydrogen atom or a lower
alkyl radical (of 1 to about 6 carbon atoms), and R8 can addi-
tionally be a group containing at lea.st one aromatic nucleus
(e.g., phenyl, naphthyl, tolyl; E can be a divalent alkylene
radical (of 1 to about 6 carbon atoms), a divalent arylene radi-
cal, a divalent aralkylene radical, a divalent alkarylene radi- :
cal,
O O O
_C_oR12_, 0c-Rl2- or -c-NH-Rl2-
wherein R12 is an alkylene radical; or R8 can be taken together
with E to form a
~0 . .
~N-R12- ' ~, .
' , ~C~o ' ' .
group; R9, R10 and Rll can be lower alkyl or aryl, or R9 and R10
and the nitrogen atom to which they are attached can together
with E represent the atoms and bonds necessary to form a quater-
nized nitrogen-containing heterocyclic ring, and G ~. is a mono-
valent negative salt-formin~ radical or atom in ionic relation-
ship with the positive salt-forming radical; wherein said poly-
mer is substantially free from carboxy groups and wherein the
positive salt-forming radical of said polymer comprises at least
two aryl groups for each quaternary nitrogen atom in said poly-
mer. These preferred.polymeric cationic mordants are described
~urther in the above-mentioned U S. Patent 3,709~690. .
Other mordants useful in my invention include poly-4- ..
vinylpyridine, the 2-vinylpyridine polymer metho-p-toluenesul- .
fonate and similar compounds descri~ed in Sprague et al, U.S.
Patent 2,484,430 issued October 11, 1949, and cetyl trimethylam-
monium bromide, etc. Effective mordanting compositions are also
-15-
. . ~
~L~)47B20
described in U.S Patents 3,271,11~8 by Whitmore and 3,271,147 by
Bush, both issued September 6, 1966.
The term "image dye-providing material" as used herein
is understood to refer to those compounds which either 1) do not
require a chemical reaction to ~orm the image dye or 2) undergo
reactions encountered in photographic imaging systems to produce
an image dye, such as with color couplers, oxichromic compounds
and the like. The first class of compounds is generally
referred to as preformed image dyes and includes shifted dyes,
etc., while the second class of compounds is generally referred
to as dye precursors.
The terms "initially mobile" and "initially immobile"
as used herein refer to compounds which are incorporated in the
photographic element and, upon contact with an al~aline process-
ing solution, are substantially mobile or substantially immo-
bile, respectively.
The following examples are included for a further
understanding of the present invention. In these examples, all
temperatures indicated are centigrade. All oxidants referred to
are found in Table 1 below The structural formulas for other
compounds used are found in the footnotes to the examples.
Example 1
The oxidants listed in Table 1 below are tested as
follows: A matrix element is prepared comprising a transparent
film base support having a layer of 125 mg./ft.2 gelatin and 50
mg./ft.2 of oxichromic compound dissolved in 75 mg./ft.2 of
diethyl lauramide. A receiver element i prepared comprising a
transparent film base support having on it a first layer of 200
mg./ft.2 of the mordant copoly[styrene:N,N-dimethyl-N-benzyl-_-
3-maleiimidopropyl)ammonium chloride] in 100 mg./ft.2 of gelatin
and a second layer (over the first layer) comprising 2000 mg./
ft 2 of titanium dioxide in 200 mg./ft.2 of gelatin. The two
-16-
, . ~
-
~6~478ZU
elements are then placed in fac -to-face contact for 60 sec.
with an alkaline processing composition, comprising 20 g. of
oxidant/liter o~ an aqueous solution o~ 4~ potassium hydroxide
and 2.5~ hydroxyethyl cellulose, spread between the elements.
Upon contact of the two elements, the oxichromic compound
migrates ~rom the matrix through the processing composition and
the titanium dioxide layer into the mordant layer o~ the
receiver. The oxichromic compound is oxidized by the iodoso
oxidant to the corresponding dye which is visible through the
transparent support and against the white background of the
titanium dioxide layer. The oxichromic compounds and the oxi-
dants used, as well as the color and reflection density of the
dye in the receiver are shown in Table 1 below.
Table 1
Color of Dye
Oxidant* Oxichromic Compound** in Receiver Dmax
1 A yellow 1.75
1 B magenta 1.00
1 C cyan 1.45
2 A yellow `1.30
2 B magenta 2-35
2 C cyan 1.34
*Oxidants:
CH30CO-I-OCOCH3
Oxidant 1
I=O
Oxidant 2 tl~"~
**Oxichromic Compound:
O O OCH3 OH
(CH3)3CCCHC~l \ ~ N~I ( 2)4
c 1 J~ ~Cl OH
OCOCH3
,
1~D478ZO
OH
N - N "(C~2)3 ~\ ~ ~ICO(CH2)4 ~ j
NH H OH
Cl ~
OCOCH3
OH . ) J
OH J ~ - NIICO~F
C j ~ (cH2)4coNH ~,l FF'
NCOCF3
OH ~ `
Cl- ~ - Cl
OH
Example 2:
An integral color-transfer, photographic element is
prepared having the following structure:
1) transparent polyethylene terephthalate support;
2) dye mordant layer containing gelatin at 100 mg./ft.2,
- copoly[styrene:_-benzyl-N,N-dimethyl-N-(3-maleimidopropyl)-
ammonium chloride] at 200 mg./ft.2 and iodoso Oxidant 1 at
200 mg./ft.2;
3) layer containing titanium dioxide at 2000 mg./ft.2 and gela-
tin at 200 mg./ft.2;
4) layer containing carbon opacifying agent at 200 mg./ft.2 and
gelatin at 156 mg./ft 2;
5) layer containing gelatin at 75 mg./ft.2, 2,5-di-sec-dodecyl-
hydroquinone at 70 mg./ft.2 and tricresyl phosphate at 23
mg./ft.2;
6) layer containing a red-sensitive silver bromoiodide emulsion
at 70 mg./ft.2 based on silver, gelatin at 230 mg./ft.2,
Compound D* at 42 mg./ft.2 dispersed in diethyl lauramide at
73 mg./ft.2, 5-(2-cyanoethylthio)-1-phenyltetrazole at 5
mg./ft.2 dispersed in tricresyl phosphate at 15 mg,/ft.2 and
; -18-
.
1~47820
5,6,7,8-tetrahydro-5,8-methano-1,4-naphthalenediol at 10
mg./ft 2,
OH
OH ~ ~ ~ NHCC ~ ~ C5Hll n
D ~ J (CH2)4CONH ~
NCOCF3
OH
Cl ~ Cl
OH
7) layer containing gelatin at 300 mg./ft.2, 2,5-di-sec-dodec-
ylhydroquinone at 70 mg./ft.2 and a magenta filter dye at 30
mg./ft.2 dissolved in diethyl lauramide at 50 mg./ft.2;
8) layer containing green-sensitive silver bromoiodide emulsion
at 70 mg./ft.2 based on silver, gelatin at 230 mg./ft.2,
Oxichromic Compound B at 54 mg./ft.2 dispersed in diethyl
lauramide at 64 mg./ft.2, 5-(2-cyanoethylthio)-1-phenyltet-
razole at 5 mg./ft.2 dispersed in tricresyl phosphate and
5,6,7,8-tetrahydro-5,8-methano-1,4-naphthalenediol at 10
mg./ft.2;
9) layer containing gelatin at 300 mg./ft.2, 2,5-di-sec-dodec-
ylhydroquinone at 70 mg./ft.2 and a yellow filter dye at 100
mg./ft.2 dispersed in diethyl lauramide at 28 mg./ft.2,
10) layer containing a blue-sensitive silver bromoiodide emul-
sion at 70 mg./ft.2 based on silver, gelatin at 210 mg./
ft.2, Oxichromic Compound A at 64 mg./ft.2 dispersed in
diethyl lauramide at 106 mg./ft.2, 5-(2-cyanoethylthio)-1-
phenyltetrazole at 5 mg./ft.2 dispersed in tricresyl phos-
phate at 15 mg./ft.2 and 5,6,7,8-tetrahydro-5,8-methano-1,4-.
naphthalenediol at 10 mg./ft.2;
11) layer containing gelatin at 50 mg./ft.2.
A transparent cover sheet for the above element is
prepared as follows:
1) transparen~ polyethylene terephthalate support;
-19-
- .: ' ' ':
1~47~3ZO
;2) layer containing gelatin at 900 mg./ft.2, polyacrylic acid
at 900 mg./ft.2 and imidazole at 760 mg./ft.2;
3) layer containing cellulose acetate at 1140 mg./ft.2 and
copoly(styrene-maleic anhydride) at 60 mg./ft.2.
The photographic element is exposed through a multi-
color, graduated-density test object, the transparent cover
sheet is superposed on the element, and a pod containing an
opaque processing composition is ruptured to discharge between
the cover sheet and the photosensitive element by passing the
film unit through juxtaposed rollers having a gap of about 8
mils. The processing composition is as follows:
potassium hydroxide 51 g./l.
hydroxyethyl cellulose 30 g./lh
potassium bromide 40 g./l.
~-benzylpicolinium bromide 15 g./l.
5,6,7,o-tetrahydro-5,8-methano-1,4- 15 g./l.
naphthalenediol
carbon 40 g./l.
After about 1 to 2 min., a well-defined color image
with excellent color reproduction is viewed through the trans-
parent support of the integral element.
AIthough the invention has been described in consid-
erable detail with particular reference to certain preferred
embodiments thereof, variations and modifications can be effec-
ted within the spirit and scope of the invention.
,~
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