DE289570C - - Google Patents
Info
- Publication number
- DE289570C DE289570C DENDAT289570D DE289570DA DE289570C DE 289570 C DE289570 C DE 289570C DE NDAT289570 D DENDAT289570 D DE NDAT289570D DE 289570D A DE289570D A DE 289570DA DE 289570 C DE289570 C DE 289570C
- Authority
- DE
- Germany
- Prior art keywords
- parts
- ammonium
- aluminum
- salts
- colors
- 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.)
- Active
Links
- 238000007639 printing Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 150000002823 nitrates Chemical class 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000001590 oxidative Effects 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- OHORFAFFMDIQRR-UHFFFAOYSA-P Hexafluorosilicic acid Chemical compound [H+].[H+].F[Si-2](F)(F)(F)(F)F OHORFAFFMDIQRR-UHFFFAOYSA-P 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 229920000084 Gum arabic Polymers 0.000 description 2
- 241000978776 Senegalia senegal Species 0.000 description 2
- 239000000205 acacia gum Substances 0.000 description 2
- 235000010489 acacia gum Nutrition 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- PRORZGWHZXZQMV-UHFFFAOYSA-O azanium;nitric acid Chemical compound [NH4+].O[N+]([O-])=O PRORZGWHZXZQMV-UHFFFAOYSA-O 0.000 description 1
- 125000005340 bisphosphate group Chemical group 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000004059 degradation Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- VKFFEYLSKIYTSJ-UHFFFAOYSA-N tetraazanium;phosphonato phosphate Chemical compound [NH4+].[NH4+].[NH4+].[NH4+].[O-]P([O-])(=O)OP([O-])([O-])=O VKFFEYLSKIYTSJ-UHFFFAOYSA-N 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Vr 289570 — KLASSE 15ä. GRUPPE Vr 289570 - CLASS 15ä. GROUP
Zusatz zum Patent 247820.Addendum to patent 247820.
Nach Patent 247820 wird mit einer Lösung gearbeitet, welche ausAccording to patent 247820, a solution is used which consists of
2 Teilen kieselfluorwasserstoffsaurem Aluminium, 2 parts of silicofluoric acid aluminum,
6 Teilen kieselfluorwasserstoffsaurem Ammonium, 6 parts of silicofluoric acid ammonium,
15 Teilen zweifachphosphorsaurem Ammonium, 15 parts of bisphosphate of ammonium,
19 Teilen salpetersaurem Ammonium,
7 Teilen salpetersaurem Aluminium19 parts of nitric acid ammonium,
7 parts of nitric aluminum
und aus 22 1 Wasser besteht, der 3 1 dicke Gummiarabikumlösung zugesetzt ist. Diese Ätze für lithographische Metallplatten färbt bei dem Vorgange des Ätzens vornehmlich die Zinkplatten etwas bräunlichgrau, und es ergeben sich leicht unruhig aussehende und wolkige Oberflächen, welche die Sicht erschweren, indem sie kleine Unreinlichkeiten verdecken, Linien, Punkte u. dgl. im Aussehen beeinflussen. Bereits die schwarze Einwalz- und Umdruckfarbe oder die schwarze Druckfarbe heben sich bei dieser Färbung der Platten schlecht ab; in noch störenderem Maße aber geschieht - dies bei hellen und lichten Tönen, z. B. bei grauen Farben bei dem Maschinendruck und besonders den rasch laufenden Maschinen. Kleine Schmutzflecken, Absetzen oder Ansätze (Tonen) werden allzu spät erkannt, nachdem gewöhnlich schon ein bedeutender Schaden geschehen ist, da die feldgraue Farbe der Platte die meist hauchdünnen Farben unsichtig werden läßt. Dies ist durch die Verwendung von Nitraten verursacht, da durch den schrittweisen und ungleichmäßig wirkenden Abbau aus einer hohen Oxydationsstufe zu niedrigeren und zuletzt zu Ammoniak die Reaktion ungünstig beeinflußt wird. Diesem Übelstand wird aber dann abgeholfen, wenn ein Oxydationsmittel, das sich nicht bis zur Base umändert, verwendet wird. Als solches ist die Überschwefelsäure, besonders in ihren löslichen Salzen, hervorragend geeignet. Durch deren Verwendung gelingt es, das früher erhaltene Ergebnis so zu verbessern, daß das Zink weißlich gefärbt erscheint und dabei wesentlich stumpfer aussieht. Infolgedessen sind auch die kleinsten Punkte und leichtesten Flecken rascher zu sehen, was von besonderem Vorteile bei den raschlaufenden Druckmaschinen ist, da der~5o Schaden auch rascher bemerkt wird. Insbesondere ist dies vorteilhaft bei den feinen Rastern aus geraden und gekreuzten Linien, bei allen Arten von Kornrastern und bei Farbendruck mit lichten Farben. Ein weiterer Vorteil ist, daß das neue Oxydationsmittel die Schicht noch dichter und saugfähiger herstellt, während die Reaktion ebenso schnell vor sich geht wie die im Patent 247820 beschriebene. Geeignet ist von den Persulfaten besonders das Ammoniumsalz, ferner das Aluminiumsalz und Kalziumsalz; aber auch dieand consists of 22 liters of water to which 3 liters of gum arabic solution is added. These Etch for lithographic metal plates predominantly colors in the process of etching the zinc plates are somewhat brownish-gray, and the result is slightly restless-looking and cloudy surfaces that make visibility difficult by covering up small imperfections, Affect lines, points and the like in appearance. Even the black roll-in and transfer printing ink or the black printing ink stand out poorly with this coloring of the plates; but occurs to an even more disturbing degree - this with light and light Tones, e.g. B. with gray colors in the machine printing and especially the fast running Machinery. Small spots of dirt, settlements or approaches (clay) are too late recognized after significant damage has usually already occurred, since the field gray Color of the plate makes the mostly wafer-thin colors invisible. This is caused by the use of nitrates, because of the gradual and uneven acting degradation from a high oxidation level to lower and finally to ammonia adversely affects the reaction will. This problem is remedied if an oxidizing agent is used not changed to base, is used. As such, supersulfuric acid is special in their soluble salts, excellently suited. By using them succeeds it is to improve the result obtained earlier so that the zinc appears whitish in color and looks much duller at the same time. As a result, even the smallest dots and lightest spots close more quickly see what is of particular advantage with the high-speed printing machines, since the ~ 5o Damage is also noticed more quickly. This is particularly advantageous with the fine ones Grids of straight and crossed lines, with all types of grain grids and with Color printing with light colors. Another advantage is that the new oxidizer makes the layer even denser and more absorbent, while the reaction is just as fast proceeds like that described in patent 247820. Is suitable from the persulfates especially the ammonium salt, also the aluminum salt and calcium salt; but also the
anderen löslichen Salze können als Ersatz der Nitrate verwendet werden, mit Ausnahme des löslichen Kaliumsalzes.other soluble salts can be used as substitutes for the nitrates, with the exception of the soluble potassium salt.
Die Zusammensetzung der Ätze besteht bei der neuen Mischung aus:The composition of the etch in the new mixture consists of:
2 Teilen kieselfluorwasserstoffsaurem Aluminium, 2 parts of silicofluoric acid aluminum,
6 Teilen kieselfluorwasserstoffsaurem Ammonium, 6 parts of silicofluoric acid ammonium,
ίο 1.5 Teilen zweifachphosphorsaurem Ammonium, ίο 1.5 parts of diphosphate ammonium,
20 Teilen überschwefelsaurem Ammonium, ίο Teilen schwefelsaurem Aluminium,-ίο Teilen überschwefelsaurem Aluminium, die in ungefähr 100 bis 120 Teilen Wasser aufgelöst sind, und wozu 10 Teile Gummiarabikum hinzugefügt werden. Aber die Mengenverhältnisse können ohne Schaden innerhalb gewisser Grenzen variiert werden ; insbesondere können statt der Ammoniumsalze auch die Natrium- und Kalziumsalze verwendet werden.20 parts of supersulphuric ammonium, ίο parts of sulphurous aluminum, -ίο Parts of supersulfuric aluminum dissolved in approximately 100 to 120 parts of water and to which 10 parts of gum arabic are added. But the proportions can be varied within certain limits without damage; in particular can Instead of the ammonium salts, the sodium and calcium salts can also be used.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE289570C true DE289570C (en) |
Family
ID=544591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT289570D Active DE289570C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE289570C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE856156C (en) * | 1941-10-10 | 1952-12-11 | Strecker Otto C Dr Kg | Primer for planographic printing plates |
-
0
- DE DENDAT289570D patent/DE289570C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE856156C (en) * | 1941-10-10 | 1952-12-11 | Strecker Otto C Dr Kg | Primer for planographic printing plates |
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