CS239452B1 - A method of fluidly developing diazographic material - Google Patents

Abstract

A method for the fluid development of a diazographic material comprising a metallizing agent comprising at least one metal salt, preferably sodium, potassium, magnesium, zinc, nickel and / or aluminum salts, and optionally a color-forming slut or / and a blue passive component whose the essence is that a developer is used which also contains the said processing example and optionally contains such a blue or / and yellow passive component, the content of which in the developer relative to the content in the diazograph of the material is equal to 0:10 to 10: 0 , β preferably 4: 1.

Description

The invention relates to a process for the liquid development of diazographic material.

The disadvantage of many diazographic materials, especially pakjro liquid induction, is in the first place considerable demands on the raw materials used and hence the usually complicated preparation of these substances and their high cost. The universal developer described in the literature, which utilizes liquid organic bases, encounters a complicated adjustment process beyond the often increased aggressiveness of the resulting azo color. The general drawback of a series of azo dyes, which are either single or tolerant, constitutes the essence of the resulting latent image for subsequent fluid development and visibility, the so-called drawing bleeding, which is due to a number of factors such as the very nature of individual or mixed azo dyes. Especially in the case of liquid diazosystems, this drawback has not been remedied, which has resulted in the search for special, often difficult-to-access components that have partially eliminated the drawback. The quality of the resulting azoimage is then acceptable, but it is characterized by the aforementioned inaccessibility of the substances used, their complex preparation, demanding intermediates, and thus the generally high price.

We have now found a palzographic metallized material for the liquid or ammoniacal development of mixed azo dyes by the developer, which contains, in addition to conventional diazography, an increased concentration of metal salts such as sodium, potassium, magnesium, aluminum, zinc which are applied in the same 1 in the base material so that the paper-developer system is characterized by the state of these metal salts.

Thus, the above drawbacks have no method of liquid developing a diazographic material comprising a metallizing additive comprising at least one metal salt, preferably sodium, potassium, magnesium, zinc, nickel and / or aluminum salt, and optionally a coloring yellow and / or blue passive component, characterized in that a developer is also used which also contains said metallising additive and optionally also contains a blue and / or yellow passive component, whose content in the developer in relation to the content in the diazographic material is 0: 10 to 10: 0, preferably 4: 1.

It is not contrary to the invention to utilize different chemical compositions of the blue passive components, but it is only necessary to monitor the formation of the azo dye in terms of the coupling kinetics of the components involved in the final reaction in the liquid induction process. The final effect achieved by the invention, ie the double use of the blue coupling component, both in the material and in the developer, with a sufficient concentration of salting agents used in the form of the above-mentioned salts, is surprising.

In practice, there is nothing to prevent the use of others in the diazography of conventional substances, such as other coloring agents, single or mixed diazo compounds, buffering agents, antihalatants, wetting agents, other metallizing agents, microcolloid additives, microcolloid silicates and silicon dioxide and the like. pH regulators, stabilizers, reducing agents, amateurs, etc. It is understandable that to increase system stability

- the developer can, in the case of predominantly liquid induction, eliminate or reduce hygroscopic flights or generally coupling acceleration patterns. Conversely, brightening optical preparations / the like can be added to the developer to improve the substrate.

Universal palzographic metallized material is therefore a system - material

- the developer and the main effect of the liquid induction is given by the state of latently coupled passive and active components, i.e. the latent formed azo dyes or a mixture of azo dyes.

A variety of regulated metallized diazo assemblies, preferably substituted p-phenylenedianine-derived diazo compounds and a heterocyclic moiety, or a mixture of two or more diazo compounds according to a final requirement, characterized, for example, by sensitivity, can be used to form mixed latent azo dyes.

As diazo compounds according to the invention, for example, simple or substituted p-phenylenediamine derivatives, preferably 4-diazo-dialkyl or 4-diazo-alkyl-alkoxy-p-phenylenediamine or the corresponding diazo compounds with a heterocyclic radical, e.g. morpholino, piperidine, can be used. or pyrrolidine, further diazo compounds substituted in the 2,5-position on the nucleus by alkyl or alkoxy or halogen, diazo compounds substituted in the branched chain on tertiary nitrogen and diazo compounds derived from simple, optionally substituted diphenylamines.

As yellow components, for example, acetyloacetylated derivatives of aniline, benzamide, toluidine, anisidine or polyhydroxyphenols and PeIi substituted derivatives, < RTI ID = 0.0 > tylenediamine-bis-acetoecetemide < / RTI >

The blue components used may be, for example, simple or substituted amides of hydroxycarboxylic acids, further preferably morpholinopropylamides, diethanolamides or piperidides or piperazides of these acids or components derived from hydroxy or polyhydroxy naphthalene or the corresponding sulfonic acids or their salts, preferably beta-aminoethylaid 2-oxy-3-naphthoic acid. >

Example 1

Prepare a mixture of the following composition:

Distilled or deionized water 900 ml Tartaric acid 18 g Urea 20 g Thiourea 13 g Zinc chloride 15 g Aluminum sulphate 15 g Barium chloride 5 g 4-Diazo-N-ethyl-NP-oxyethylaniline 1/2 Zn & ₂ 20 g 2 -oxy-3-acid. This mixture is made up to 1350 ml with distilled water or deionized water. The assembly is applied to a paper or foil mat and dried.

Example 2

Prepare a mixture of the following composition:

Water distilled or deionized 900 ml

Alavelic acid 18 g

Urea 20 g

Thiourea ¹ 3 S

Sodium chloride 15 g

Potassium chloride 15 g

4-Diazo-N-ethyl-N-p-oxyethylaniline. 1/2 ZnCl ^ 20 g

2-Oxy-3-naphthoic acid p-aminoethylamide 15 g (this mixture is made up to 1350 ml with distilled water or deionized water).

The assembly is applied to a paper or foil mat and dried.

Example 3

Prepare a mixture of the following composition:

Distilled or deionized water 900 ml

Citric acid 30 g

Boric acid 10 g

Urea 20 g

Thiourea 13 g

Zinc chloride 15 g

Magnesium chloride 5 g

Sodium chloride 5 g

Potassium chloride 5 g

4-Azo-N-ethyl-N-β-oxyethylaniline. 1/2 SnCl ^ 20g

2-Oxi-3-naphthoic acid morpholinopropylamide 15 g;

this mixture is made up to 1350 [mu] l with deionized or deionized water.

The assembly is applied to a paper or foil mat and fixed.

Example 4

Universal developer for 1 liter of solution:

Ethylenediamine-N, N-bis-acetoacetamide 1 g Acetoacetanilide 1 g 2-oxy-3-naphthoic acid β-aminoethylamide 4 g Borate mixture 70 g Sucrose 40 g Sodium chloride 20 g Potassium chloride 10 g.

The borate mixture is a mixture of meta and potassium tetraborate in such a ratio that was 10-12.

Example 5

Universal developer for 1 liter of solution:

make pH developer

Acetoacetanilide 2 g Morpholinopropylamide 2-oxy-3-naphthoic acid 4 g Boret mixture 70 g Sucrose 40 g Potassium chloride 30 g.

The borate mixture is a mixture of meta and potassium tetraborate in such a ratio, the troops were 10 to 12.

When developing, the developer is applied to the material in the developing machine, by spreading, for example with cotton wool.

to make the pH of the solution preferably even

Claims (1)

BACKGROUND OF THE INVENTION A process for liquid developing a diazographic material comprising a metallising additive consisting of at least one metal salt, preferably sodium, potassium, magnesium, zinc, nickel and / or aluminum salt, and optionally a coloring yellow or / and a blue passive component, characterized in that a developer is also used, which also contains said aetallising additive and optionally contains such a blue and / or yellow passive component, whose content in the developer relative to the content in the diazographic material is 0: 10 to 10: 0, preferably 4: 1.