AT108443B - Flat printing process. - Google Patents
Flat printing process.Info
- Publication number
- AT108443B AT108443B AT108443DA AT108443B AT 108443 B AT108443 B AT 108443B AT 108443D A AT108443D A AT 108443DA AT 108443 B AT108443 B AT 108443B
- Authority
- AT
- Austria
- Prior art keywords
- printing process
- flat printing
- mixture
- printing plate
- printing
- Prior art date
Links
Description
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schwemmung und Härtungsstoff, entfernt werden. Auf die gleiche Art wird auch bei Klatschen für Farbendruck die K1atschfarbe entfernt.
Bei dem geschilderten Verfahren wird'das Plattenmaterial nicht angegriffen, und es vereinfacht sich daher die Art und Weise der Wiederverwendung gebrauchter Platten. Es genügt, die Druckfarbe mit Terpentin, Petroleum, Benzol od. dgl. zu entfernen und dann die Druckplatte, wenn sie aus Stein oder Zink besteht, mit Lauge, oder wenn sie aus Aluminium bEsteht, mit verdünnter Schwefelsäure zu behandeln. Das Neuschleifen des Steines oder das Neukörnen der Metallplatte wird erspart ; Metall- platten, deren Körnung durch Schaben stellenweise verlorengegangen ist oder durch oftmaligen Gebrauch stumpf geworden ist, müssen allerdings neu gekörnt werden.
PATENT-ANSPRÜCHE :
1. Flachdruckverfahren von lithographischem Stein. Metall usf., wobei die bereits die Zeichnung (Umdruck) tragende Druckplatte durch Behandlung mit einem nichtätzenden Mittel gegen die Aufnahme von Farbe an den von Zeichnung freien Stellen geschützt werden soll, dadurch gekennzeichnet, dass die Druckplatte aufeinanderfolgend mit zwei Mitteln behandelt wird, deren erstes einen an der Druckplatte festhaftenden Überzug erzeugt, der aber gleichzeitig auch einen Untergrund bildet, der das Festhaften der aus dem zweiten Mittel bestehenden Oberschicht gewährleistet, wobei für die Oberschicht eine Mischung eines im Wasser aufgeschwemmten Kolloids (z. B.
Gummiarabikum, Agar-Agar, Dextrin od. dgl.) mit einem dieses härtenden oder gerbenden Stoff (Gallussäure, Chromsäure, Formaldehyd, Tannin od. dgl.) benutzt wird.
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flooding and hardening agent, are removed. In the same way, if you clap for color printing, the clap color is removed.
In the process described, the plate material is not attacked, and the way in which used plates can be reused is therefore simplified. It is sufficient to remove the printing ink with turpentine, petroleum, benzene or the like and then to treat the printing plate with lye if it is made of stone or zinc, or with dilute sulfuric acid if it is made of aluminum. There is no need to regrind the stone or re-grain the metal plate; Metal plates, the grain of which has been lost in places through scraping or has become dull through frequent use, must, however, be grained again.
PATENT CLAIMS:
1. Planographic printing process of lithographic stone. Metal etc., whereby the printing plate already carrying the drawing (transfer printing) is to be protected against the absorption of ink in the areas free from drawing by treatment with a non-etching agent, characterized in that the printing plate is treated successively with two agents, the first of which creates a coating that adheres firmly to the printing plate, but at the same time also forms a substrate that ensures the adherence of the top layer consisting of the second agent, with a mixture of a colloid suspended in water (e.g.
Gum arabic, agar-agar, dextrin or the like) is used with a substance (gallic acid, chromic acid, formaldehyde, tannin or the like) that hardens or tans it.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT108443T | 1926-11-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT108443B true AT108443B (en) | 1927-12-27 |
Family
ID=3625063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT108443D AT108443B (en) | 1926-11-03 | 1926-11-03 | Flat printing process. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT108443B (en) |
-
1926
- 1926-11-03 AT AT108443D patent/AT108443B/en active
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