DE1286899B - Photographic image transfer process - Google Patents

Description

1 2

The invention relates to a photographic image-coated state on 1 kg about 1.54 g form transfer process in which an uncured silver halide about 0.62 g formaldehyde located on an aldehyde (100%) or after 3 to 6 months of storage contain. Such non-emulsion layers containing a water-hardened silver halide emulsion layers are image-wise exposed with the tanning SO ₂ adduct of a silver halide 5, for example in US Pat. No. 2,596,756 and developing substance, described with a 2,716,059.

alkaline solution hardened imagewise and in still To carry out the method of the invention

suitable water-soluble tanning SO ₂ adducts of

will. Silver halide developers can e.g. B. be

There are, for. B. from the _{USA patents 2,596,756 io the SO a} adducts of toluhydroquinone, chlorohydro-

and 2,716,059, known image transfer method, quinone, pyrogallol monocarbonate, 4,4 '- (2,3-dimethyl-

in which a practically unhardened silver halide- tetramethylene) -dibrenzcatechol, gentisic acid and

emulsion layer consisting of a tanning and a non-catechol carbonate or mixtures thereof

tanning developer substance contains, imagewise, bel-phenyl- ^ dimethyl-S-pyrazolidone and hydroquinone

clears and then by treatment with 15 or N-methyl-p-aminophenol sulfate and hydrochi-

an alkaline activator solution is developed. non. The SO _a adduct of catechol has proven to be

The exposed and activated silver halide emulsion proved particularly advantageous because it works particularly well

layer is then pressed against an image-receiving sheet, is water-soluble and gelatin is primarily attached to the emulsion

whereby a layer of the partially developed and surface hardens.

uncured silver halide emulsion layer on the 20 The production of SO ₂ adducts is exemplified

Image receiving sheet is transmitted. The transmission method in the journal Chemical Reviews, Vol. 59,

stage can be repeated, so that a silver 1959, pp. 827 to 830, described,

halide emulsion layer made several prints The concentration of the SO ₂ adduct in the emulsion

can be. The ionic layer can fluctuate within wide limits.

The disadvantage of the known method is that the 25 expediently 0.01 to 0.10 mol of silver halide

The number of prints that can be made depends on how developing substance per mole of the

The individual transfers take place quickly, because the in. The silver halide during manufacture

through which the binder, especially gelatin, of the emulsion uses silver nitrate,

hardening developer substance over time also the transferred to the Biltiempfannblatt

unexposed areas of the layer are hardened. 30 layer should have sufficient optical density,

It is also known that in the context of an image over the silver halide emulsion layer before the transfer process, a photographic recording exposure pigments or other colored substances can be added material with a silver halide emulsion or to use in the transferred emulsion layer, which are formed as a developer substance. In order to accelerate the development of the mixture of a water-soluble tanning SO ₂ - 35 silver halide in the transferred layer, the adduct of β-diethylaminoethanol, l-phenyl-4,4-diminigen, can optionally be heated. contains methyl-3-pyrazolidone and hydroquinone. After- Also, obscuring agents, e.g. B. Thiournteilig is involved in the use of such photographic material, on the surface of the receiving sheet recording materials that are used in their use. If necessary, in the context of the usual image transfer vergenide emulsion layer, a color development process containing only brownish images or prints can be added to the silver halide which can then be transferred. Layer gives the required optical density.

The object of the invention is to provide an image transmission. According to one embodiment of the invention, a

process to specify the regardless of how silver halide emulsion layer is used as

the individual transfers take place quickly, a 45 physical development nuclei colloidal silver,

larger number of prints can be made colloidal gold, silver oxide, silver proteinate, cad

and in which black images are also obtained. medium sulfide, cobalt sulfide, zinc sulfide or nickel sulfide

The subject matter of the invention proceeds from a contains.

A photographic image transfer process in which the image-receiving sheet is preferably composed of

an uncured 50 sheet of paper on a substrate. However, images can also be

Silver halide emulsion layer containing catch leaves can be used which e.g. B. from cellulose

a water-soluble tanning SO ₂ adduct of an acetate, polyethylene terephthalate, polyethylene, poly

Silver halide developing substance consist of styrene, glass, wood and the like in an imagewise fashion,

cleared, imagewise formed with an alkaline solution The silver halide of the silver halide emulsion

hardens and when still moist on a picture layer is preferably made of silver chloride. That

Receiving sheet is pressed from and is thereby obtained. However, silver halide can also be made from one of the

indicates that a silver halide emulsion - common other silver halides, such as silver bromide,

layer containing physical development nuclei, silver iodide, silver chloride bromide, silver chloride iodide,

and an alkaline solution containing a silver halide, silver bromide iodide and silver bromide chloride iodide,

contains solvents. 60 stand.

What is achieved by the invention is that, regardless of how fast the individual transfers are suitable for carrying out the method of the invention, a larger number of prints can be produced, e.g. B. 0.003 to 0.015 mol of silver halide can be, which are characterized by a deep dark blue and 0.001 to 0.005 g physical development black tone. 65 germs per 0.09 m ^a carrier area and 0.01 to 0.10 mol

To carry out the method of the invention of a water-soluble tanning SO ₂ adduct a

silver halide emulsion layers are suitable which contain silver halide developing substance per mole of silver

are not harder than gelatin layers that are contained in the fresh halide of the emulsion layer.

3 4

As an activator solution, the usual known graphic material can be excess liquid Activator solutions are used, e.g. B. those that are removed by pressing.

Contain sodium carbonate and urea, if only then the transfer takes place by means of

a silver halide solvent is present. Appropriate pressing of the exposed and activated silver halide

Silver halide solvents are, for example, Na emulsion layer on an image-receiving sheet 8. The

trium thiosulfate, sodium rhodanide and sodium sulfite. when the deduction is obtained, as can be seen from FIG. 3

In order to obtain the color obtained by the method of the invention, from the image-receiving sheet 8 with the over-producible To improve deductions, the image-bearing districts 9.

transfer process in the presence of the diffuse After moistening of the silver halide emulsion

ion transfer process conventional toner through-layer with further activator solution can be further

leads to be. Such toners are, for example, prints using fresh image receiving

in U.S. Patent 3,017,270. leaves are made.

In order to facilitate the transfer, the halide emulsion layer on an alkaline solution image-receiving sheet may contain an emollient, e.g. B. urine-containing material can optionally also be used as 15 substance, salicylic acid, formamide, ethylene chlorohydrin printing plate if the transferred or sodium nitrate are added. If necessary, the image is colored with a bold color. In this case, however, the emollient can also instead of being expedient to post-treat the image with one of the usual alkaline solutions in a special solution in the known agent, by means of which following the development in concentrations of the different absorption levels present per se 20% depending on the silver halide ability of the image area and the support used for the fatty emulsion layer and the color developing conditions. Such agents will be applied
for example in US Pat. No. 2,794,388, Example 1
wrote.

To prepare the silver halide emulsion layer 25 of 920 g of a silver chloride emulsion containing 1 mol can contain a wide variety of hydrophilic organic silver chloride and 64 g of gelatin, colloids have been used as binders, forward-150 ml ml with 250 of a 10 ° / ₀ by weight bone gelatin Suppose that diluted them with tanning silver halide solution and 50 ml of water,
development substances are tanned or hardened. To 90 ml of the diluted emulsion, 4 ml, apart from the gelatine 30 preferably used, of a 5 g solution saturated with sulfur dioxide, the colloids can consist, for example, of catechol in 50 g of distilled water. Proteins such as soybean protein and casein. Others 1 to suitable hydrophilic colloids of synthetic nature were added to the diluted emulsion, 3 ml of a silver proteinate solution containing 2% gel per liter and consisting, for example, of polyvinyl alcohol, latine and 1 g of silver proteinate according to Mallinckrodt hydrolyzed cellulose esters and the like. The emulsion was then

The light-sensitive silver halide emulsion is applied in a thickness of 0.254 mm, measured wet, to a cellulose acetate support under suitable safety light conditions,
The photographic recording material obtained was wound, as in FIG. 1 shown, a reflex

For example, the method of the invention can be subjected to 40 exposure. After the exposure it was

in the manner shown in the drawing through the material with an activator that is per 11 aqueous

be guided. Solution 50 g sodium carbonate, 30 g urea and 14 g

According to FIG. 1 is a photographic containing sodium thiosulphate treated.

Drawing material, consisting of the layer carrier 1 A well-differentiated hardness relief was obtained,

and the silver halide emulsion layer 2 one before 45 of that by transfer to image-receiving sheets

position 3, exposed. The exposure is through the 17 prints of excellent quality and one

Carrier 10, d. That is, there is a reflex exposure. The superbly black image tone can be obtained

Silver halide emulsion layer is through that.

exposed the wearer to urgent light, whereby in the same favorable results were then obtained Districts 4 and 5 show the shadow and the high 50, respectively, if a silver chloride emulsion was used Lights corresponding to the original contain latent images instead of the silver protein will. winding seeds from colloidal silver, colloidal

The exposed recording material is then treated with gold, silver oxide, cobalt sulfide, zinc sulfide and nickel alkaline solution hardened imagewise. The sulfide contained.

Curing can be achieved, for example, at 27 ° C with a 55 Equivalent results were also obtained

5% sodium carbonate, 3% urea and 1% Na- if a silver chloride emulsion was used, the

trium thiosulfate containing solution are hardened. instead of the SO ₂ adduct of catechol

As in Fig. Shown 2, metallic speaking adducts of silver halide developers

Silver, partly as a result of the imagewise substances such as toluhydroquinone, chlorohydroquinone,

exposure and partly due to exposure to 60 pyrogallol monocarbonate, pyrocatechol carbonate, 4,4'-

through the carrier. (2,3-dimethyltetramethylene) dibrenzatechol, genti-

District 6 of the silver halide emulsion layer, acidic or l-phenyl ^^ - dimethyl-S-pyrazolidone-

the less exposed and therefore less hardened hydroquinone mixtures or N-methyl-p-aminophenol-

is transferable, while districts 7 contained sulfate-hydroquinone mixtures as a result. s | i = ^

the stronger exposure also hardened more strongly, 65 The individual prints could gradually be made

that a transfer of these districts is no longer possible, d. that is, it wasn't like the

is borrowed. common known image transmission methods

From the one shown in FIG. 2 illustrated evolved photo-necessary to work quickly.

Example 2 iVerdeichsbeisoien

For comparison purposes, a photographic Prior art image transmission method as it is, for example, in the German interpretative document 1098 360 is performed.

To prepare a water-soluble developer solution suitable for incorporation into a silver halide emulsion, gaseous sulfur dioxide was passed into 2-diethylaminoethanol until at least 0.5 mol of sulfur dioxide had reacted with 1 mol of the amine and an acidic solution had formed. To 50 g of the SO ₂ adduct of 2-diethylaminoethanol, 0g4,4-dimethyl-3-pyrazolidone and 10% hydroquinone were added 64 g of gelatine were added. The emulsion was diluted with 250 g of a 10% _ao gelatin solution and 100 ml of distilled water and then applied to a cellulose acetate carrier in a thickness of 0.254 mm, measured moist.

carried. ,., · ..,

The photographic recording _ag niatenal obtained was then, as described in Example 1,

exposed. ,,. ",.

The exposed material was then with treated with a 5 ″ sodium carbonate solution.

Then the developed silver halide emulsion layer became pressed onto a picture receiving sheet. After removing the emulsion layer Material remained a brown image on the receiving sheet. After reactivating the Silver halide emulsion layer and use of fischer Image receiving sheets could be made more copies.

For the production of particularly black-toned prints it was necessary to like the recording material to process follows:

1. exposure;

2 »1 minute activation in a 5% soda solution;

3. Rinse with water for 10 seconds;
at a distance of 0.6 m;

4. 10 seconds of flashing with a 100 watt lamp _{at a distance of} 0 6 no

_{3 Develop into an} ' _em developer of the following

_4o

^W * f ^e 5> f ^{twa 5C} \ ^C ■ y ■ ··; f

p-methylammophenol sulfate 3.0 g

Sodium sulfite, dehydrated 45.0 g

Hydroquinone 12.0 g

Na carbonate, monohydrate 80.0 g

Potassium bromide. 2.0 g

^topped up ^{with water mm lter
6} x 1 minute rinse.

_{From the} results _obtained thus, results _{that will Qach tdlt the method of the} invention black _{önte Abzü in significantly simple} e _rer manner ago * _kÖQnen

Claims (1)

Claim: ^ Photographic image transfer method in which a rib located on a substrate, _uncured silver halide emulsion layer _{containing a water-soluble gerbe} ligand SO, adduct _exposes a silver halide winding _{substaQZ bildmäßi with a a} i _n i _{^ical en Lö biIdmaßig ge} Mrtet and still _{moist aQ eb BiIdempfangsblatt ge} p _re SST, characterized geke η η ζ e ic h η et that a silver halide emulsion layer containing physical _En twicklungskeime and an alkaline _{Lö, the} silver halide _dn corresponds _{Mlt v rwendet} °. _2. Photographic image transfer process according to claim 1, characterized in that _a silver _{halide emulsion layer is used which contains the physical} development _{nuclei co} noida i _es silver, colloidal gold, silver oxide, silver proteinate, cadmium sulfide, obalt sulfide, zinc sulfide or nickel sulfide. 1 sheet of drawings