EP2734377A1 - Materials and process for making decalcomanias - Google Patents

Materials and process for making decalcomanias

Info

Publication number
EP2734377A1
EP2734377A1 EP12737894.1A EP12737894A EP2734377A1 EP 2734377 A1 EP2734377 A1 EP 2734377A1 EP 12737894 A EP12737894 A EP 12737894A EP 2734377 A1 EP2734377 A1 EP 2734377A1
Authority
EP
European Patent Office
Prior art keywords
primer
decalcomanias
components
ceramics
glass
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.)
Granted
Application number
EP12737894.1A
Other languages
German (de)
French (fr)
Other versions
EP2734377B1 (en
Inventor
Marco ALBERTINI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polistampa Linea Decalco Srl
Original Assignee
Polistampa Linea Decalco Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Polistampa Linea Decalco Srl filed Critical Polistampa Linea Decalco Srl
Publication of EP2734377A1 publication Critical patent/EP2734377A1/en
Application granted granted Critical
Publication of EP2734377B1 publication Critical patent/EP2734377B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/12—Transfer pictures or the like, e.g. decalcomanias

Definitions

  • Ceramic decoration can be carried out using many techniques. In industrial production and for ceramics or glass baked at temperatures ranging between 500 and 1300° decalcomanias are also used.
  • the decalcomania decoration consists in a process which, having a lower cost than that of hand painting, has almost completely superseded this technique.
  • the colors used in the decalcomania decorating process are obtained with frits of metals.
  • One decalcomania system is the water-slide decalcomania or water-dip decalcomania, wherein, once the decoration has been transferred onto a workpiece, the latter undergoes a further firing process.
  • the photomechanical film is a means which is now used only in very restricted sectors and its production has become particularly onerous as a consequence of the very poor sales.
  • photomechanical film is that used for Cromalin film, a trademark of Du Pont, which provides for the following processing steps.
  • the image to be reproduced is digitized by a scanner and separated into the four primary colors, for each separated color a transparent photographic film, i.e. a photomechanical film, is to be printed.
  • a transparent photographic film i.e. a photomechanical film
  • the printing of the initial image is effected, using Du Pont's Cromalin product as follows: a dedicated larninating machine transfers onto paper Du Pont's photosensitive Cromalin film, on which the photographic film of one of the previously separated colors (e.g.
  • Cyan is laid down, the sheet now consisting of the paper layer, Du Pont's Cromalin film and the transparent photographic film is exposed to UV light so that all the sheet portions not covered with the film will be cured by UV light, while leaving the film-covered portions intact; the covered portions will be slightly tacky and therefore suitable to receive and hold the Cyan pigment, which will be spread with a soft brush or a proper machinery.
  • the object of the present invention is to provide the components and the manufacturing process by which the decalcomania production is executed using, inter alia, also a common inkjet printer.
  • the object of the present invention is the production of color and non-color decalcomanias for ceramics and glass for baking at temperatures between 500° and 1300°, which are made by the use of sheets of laminating release paper coated with a primer layer transferred with a laminating machine onto a decalcomania transfer paper, and a common inkjet printer which uses a specific liquid activator of the "primer" instead of common ink.
  • the "primer" to be coated on a paper with a high release index consists of:
  • Vegetable resin such as oil of turpentine or shellac, so as to confer vulnerability to the primer film towards the activator liquid which is ethanol-based; Silicone oil whose function is to improve the coating on the release paper;
  • the compound in the form of paste thus obtained is accurately milled and prepared to be coated on the sheet of laminating release paper using a flexographic or lithographic or silkscreen or pad or inkjet or spray type printing machine.
  • the mixture comprising colophony and aromatic hydrocarbon, which are present in a ratio ranging from 1:1 to 1:3 and dissolved at a temperature of 70/80°, is laid down on the primer sheet.
  • the laminating release paper treated with the primer is ready to use.
  • the specific liquid functioning as a primer activator is formulated so as to respect the features of common inkjet printers and accordingly it has the following characteristics indispensable for a proper and long-lasting use: - Fluidity suitable for the proper flowing within the ink feeding circuits without altering, under no circumstances, their normal operation.
  • the formulation of the specific liquid serving as a primer activator is a composition of ethanol or methanol, butyl glycol or propylene glycol, vegetable oil, such as oil of turpentine or another oil with an adequate content of ricinoleic acid.
  • the decalcomania manufacturing process is based on the CMYK system.
  • the primer activator liquid concerning each of the files of one of the four colors will be sprayed by the inkjet printer and pigmented one at a time, each one on the relevant primer previously coated on the sheet.
  • the manufacturing process comprises the following steps:
  • the first primer layer is laid on the transfer paper sheet using a hot laminator machine at a temperature of 60/120°;
  • the primer activator liquid of the file related, for example, to Cyan is transferred by means of the inkjet printer connected to a PC which has separated the overall image into four files, each one concerning one of the four colors; once the primer activator liquid has been transferred in the areas defined by the file of the Cyan color and as the ethanol has completely evaporated, there will be an adequate "tac” or tackiness in the sheet areas which have been covered by the activator liquid so as to make the powdered ceramic pigment adhere, which will be evenly and carefully spread over the entire sheet surface with the help of a soft brush, a cotton wad or a proper machine.
  • the powdered ceramic pigment will tend to stick only on the areas where the inkjet printer has deposited the primer activator liquid and the image will be gradually detected and perfectly visible in all its details.
  • the sheet Before the subsequent lamination step, the sheet will be perfectly cleaned by removing all the residual ceramic pigment in the white areas of the sheet using soft cotton, making sure that this is free from impurities so as to avoid scratching the just printed image and, at the same time, guarantee the proper sheet cleaning and allow the perfect adhesion of the subsequent primer during the hot lamination process.
  • the described processing steps Coating the primer on a release paper
  • the sheet if necessary, will be coUodionized and dried for at least one hour, afterwards the decalcomania is ready to be applied and put in an oven at a temperature suitable for the type of pigment used.
  • the four CMYK colors may be indifferently transferred in the sequence which an operator considers more appropriate.

Landscapes

  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Glass Compositions (AREA)

Abstract

An object of the present invention is to provide the components and the manufacturing process by which a decalcomania is carried out using, inter alia, a common inkjet printer; the purpose of the present invention is the production of color and non-color decalcomanias for ceramics and glass for baking at temperatures between 500° and 1300°, which are made by the use of sheets of laminating release paper coated with a primer layer transferred with a laminating machine onto a decalcomania transfer paper, and a common inkjet printer which uses a specific liquid activator of the "primer" instead of common ink.

Description

MATERIALS AND PROCESS FOR MAKING DECALCOMANIAS
Prior art
Ceramic decoration, as known, can be carried out using many techniques. In industrial production and for ceramics or glass baked at temperatures ranging between 500 and 1300° decalcomanias are also used.
The decalcomania decoration consists in a process which, having a lower cost than that of hand painting, has almost completely superseded this technique. The colors used in the decalcomania decorating process are obtained with frits of metals. One decalcomania system is the water-slide decalcomania or water-dip decalcomania, wherein, once the decoration has been transferred onto a workpiece, the latter undergoes a further firing process.
Currently, industrial decalcomanias are manufactured by means of a photomechanical film, with which a printing stereotype, enabling to print also color decalcomanias, is substantially made.
The photomechanical film is a means which is now used only in very restricted sectors and its production has become particularly onerous as a consequence of the very poor sales.
An use example of the photomechanical film is that used for Cromalin film, a trademark of Du Pont, which provides for the following processing steps.
The image to be reproduced is digitized by a scanner and separated into the four primary colors, for each separated color a transparent photographic film, i.e. a photomechanical film, is to be printed. Through the four films of the primary colors, the printing of the initial image is effected, using Du Pont's Cromalin product as follows: a dedicated larninating machine transfers onto paper Du Pont's photosensitive Cromalin film, on which the photographic film of one of the previously separated colors (e.g. Cyan) is laid down, the sheet now consisting of the paper layer, Du Pont's Cromalin film and the transparent photographic film is exposed to UV light so that all the sheet portions not covered with the film will be cured by UV light, while leaving the film-covered portions intact; the covered portions will be slightly tacky and therefore suitable to receive and hold the Cyan pigment, which will be spread with a soft brush or a proper machinery.
The same operation will be repeated for the other three primary colors (Magenta, Yellow, Black).
Over the years various techniques for printing decalcomanias have been invented, such as those described in the patents:
US 3.956.558 (Commercial Decal Inc.),
EP 0 669 215 (Kyoto Ceramic Art Kyodokumiai),
EP 2 189 850 (BALTEA D.C. SRL),
US 2004/0105966 (Zambelli),
US 1 420 347,
EP 1 166 983.
The cited patents provide for the realization of proper devices or the use of special colors to print decalcomanias for ceramics to be baked.
Other prior art patents are GB 1312635 (Keramik WTB) and US 2 104 025 which describe a dry transfer to effect decalcomanias to mark either glass or ceramic articles; the patent in question differs from the cited documents in that the primer comprises acrylic resin, plasticizer of the butyl glycol type, oil and vegetable resin and in that the outer layer comprises a mixture of colophony and aromatic hydrocarbon.
Field of the invention
The object of the present invention is to provide the components and the manufacturing process by which the decalcomania production is executed using, inter alia, also a common inkjet printer.
Description of the invention
The object of the present invention is the production of color and non-color decalcomanias for ceramics and glass for baking at temperatures between 500° and 1300°, which are made by the use of sheets of laminating release paper coated with a primer layer transferred with a laminating machine onto a decalcomania transfer paper, and a common inkjet printer which uses a specific liquid activator of the "primer" instead of common ink.
According to the present invention, the "primer" to be coated on a paper with a high release index consists of:
Acrylic resin for ceramic use;
- Plasticizer of the butyl glycol type loaded with plumbic, not plumbic or boric fluxes;
- Vegetable resin, such as oil of turpentine or shellac, so as to confer vulnerability to the primer film towards the activator liquid which is ethanol-based; Silicone oil whose function is to improve the coating on the release paper;
It may be possible to add or use separately a mixture composed of colophony and aromatic hydrocarbon with a ratio ranging from 1:1 to 1:3 dissolved at a temperature of 70/80°.
From carried out experiments, satisfactory results have been reached by using acrylic resin of the Mitsubishi BR 115 or 117 type, or others of the same family, with a percentage of acrylic resin and plasticizer ranging from 30/70% to 70/30% up to a 1:1 ratio, to which have been added a vegetable resin such as turpentine or shellac in a percentage between 5 and 40%, and silicone oil in a percentage ranging from 0,1 to 0,3%.
The compound in the form of paste thus obtained is accurately milled and prepared to be coated on the sheet of laminating release paper using a flexographic or lithographic or silkscreen or pad or inkjet or spray type printing machine.
After 12 hours, if necessary, the mixture comprising colophony and aromatic hydrocarbon, which are present in a ratio ranging from 1:1 to 1:3 and dissolved at a temperature of 70/80°, is laid down on the primer sheet.
After a 12-hour wait, the laminating release paper treated with the primer is ready to use.
According to the invention, the specific liquid functioning as a primer activator is formulated so as to respect the features of common inkjet printers and accordingly it has the following characteristics indispensable for a proper and long-lasting use: - Fluidity suitable for the proper flowing within the ink feeding circuits without altering, under no circumstances, their normal operation.
- Nearly infinite drying time.
- Lack of aggressiveness towards printer mechanical components
(made of either plastic or metal).
According to the invention, the formulation of the specific liquid serving as a primer activator is a composition of ethanol or methanol, butyl glycol or propylene glycol, vegetable oil, such as oil of turpentine or another oil with an adequate content of ricinoleic acid.
From carried out experiments it has been found that optimal results for the production of the specific liquid serving as a primer activator are obtained with a mixture having the following percentages:
Ethanol or methanol 70 %
Propylene glycol 10 %
Vegetable oil 20 %
Possible variations in the ratio between the components may be necessary, depending on the used acrylic resin which may have slightly different features from supplier to supplier.
According to the present invention, the decalcomania manufacturing process is based on the CMYK system. The primer activator liquid concerning each of the files of one of the four colors will be sprayed by the inkjet printer and pigmented one at a time, each one on the relevant primer previously coated on the sheet.
The manufacturing process comprises the following steps:
The first primer layer is laid on the transfer paper sheet using a hot laminator machine at a temperature of 60/120°;
The primer activator liquid of the file related, for example, to Cyan is transferred by means of the inkjet printer connected to a PC which has separated the overall image into four files, each one concerning one of the four colors; once the primer activator liquid has been transferred in the areas defined by the file of the Cyan color and as the ethanol has completely evaporated, there will be an adequate "tac" or tackiness in the sheet areas which have been covered by the activator liquid so as to make the powdered ceramic pigment adhere, which will be evenly and carefully spread over the entire sheet surface with the help of a soft brush, a cotton wad or a proper machine.
At this point, the powdered ceramic pigment will tend to stick only on the areas where the inkjet printer has deposited the primer activator liquid and the image will be gradually detected and perfectly visible in all its details.
Before the subsequent lamination step, the sheet will be perfectly cleaned by removing all the residual ceramic pigment in the white areas of the sheet using soft cotton, making sure that this is free from impurities so as to avoid scratching the just printed image and, at the same time, guarantee the proper sheet cleaning and allow the perfect adhesion of the subsequent primer during the hot lamination process. The described processing steps Coating the primer on a release paper
- Laminating the primer on the sheet
- Printing the file related to the color being processed by means of the inkjet printer which transfers the primer activator liquid in the areas defined by the file
Starting a drying process, if necessary
- Dusting with a ceramic pigment having a shade suitable for the file of the color being processed
- Cleaning the sheet will be identically repeated also for the remaining three colors, magenta, yellow, black.
Once the process for the last color, for example black, has been completed and the primer has been laminated again, the sheet, if necessary, will be coUodionized and dried for at least one hour, afterwards the decalcomania is ready to be applied and put in an oven at a temperature suitable for the type of pigment used.
The four CMYK colors may be indifferently transferred in the sequence which an operator considers more appropriate.

Claims

1. Components for manufacturing decalcomanias particularly suitable for ceramics and glass for temperatures up to 1300°, characterized in being composed of:
a) A primer to be applied on paper with a high release index consisting of:
Acrylic resin for ceramic use;
Plasticizer of the butyl glycol type loaded with plumbic, not plumbic or boric fluxes;
- Vegetable resin such as oil of turpentine or shellac;
Silicone oil;
b) A primer activator liquid usable with a common inkjet printer composed of: ethanol or methanol, butyl glycol or propylene glycol, vegetable oil such as turpentine oil or another oil with adequate ricinoleic acid content.
c) A mixture of colophony and aromatic hydrocarbon dissolved by heating.
2. Components for manufacturing decalcomanias particularly suitable for ceramics and glass for temperatures up to 1300° according to claim 1, characterized in that the primer includes acrylic resin of the Mitsubishi BR 115 or 117 type, or others of the same family, with a percentage of acrylic resin and plasticizer of 30/70%, to which are added a vegetable resin such as turpentine or shellac in a 5% percentage, and silicone oil in a 0,1% percentage.
3. Components for manufacturing decalcomanias particularly suitable for ceramics and glass for temperatures up to 1300° according to claim 1, characterized in that the primer includes an acrylic resin of the Mitsubishi BR 115 or BR 117 type, or others of the same family, in a percentage of acrylic resin and plasticizer ranging from 30/70% to 70/30% up to a 1:1 ratio, to which have been added a vegetable resin such as turpentine or shellac in a percentage between 5 and 40%, and silicone oil in a percentage ranging from 0,1 to 0,3%.
4. Components for manufacturing decalcomanias particularly suitable for ceramics and glass for temperatures up to 1300° according to claim 1, characterized in that the primer activator liquid is a mixture having the following percentages:
70% ethanol or methanol, 10% propylene glycol, 20% vegetable oil.
5. Components for manufacturing decalcomanias particularly suitable for ceramics and glass for temperatures up to 1300° according to claim 1, characterized in that the mixture of colophony and aromatic hydrocarbon has a ratio of the components ranging from 1:1 to 1:3, the components being dissolved at a temperature of 70/80°.
Process for manufacturing decalcomanias particularly suitable for ceramics and glass which comprises the use of the components of the claims 1 to 5, characterized in that said process includes:
Separating the image, by means of a PC, into four files, each one pertaining to one of the four CMYK basic colors;
Coating the primer on a release paper;
Laminating the primer on the laminating release paper sheet;
- Transferring, by means of an inkjet printer connected to a PC, the primer activator liquid relative to the file of the color being processed on the laminating release paper,
Starting a drying process, if necessary,
- Dusting with a ceramic pigment having a color corresponding to the file of the color being processed,
- Cleaning the sheet,
- Repeating the described operations in exactly the same way also for the remaining three colors, magenta, yellow, black.
EP12737894.1A 2011-07-18 2012-06-15 Materials and process for making decalcomanias Active EP2734377B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000372A ITRM20110372A1 (en) 2011-07-18 2011-07-18 COMPONENTS AND PROCESS OF CONSTRUCTION FOR DECALCOMANIE PARTICULARLY SUITABLE FOR CERAMICS AND GLASSES FOR TEMPERATURES UP TO 1300 °
PCT/IT2012/000179 WO2013011530A1 (en) 2011-07-18 2012-06-15 Materials and process for making decalcomanias

Publications (2)

Publication Number Publication Date
EP2734377A1 true EP2734377A1 (en) 2014-05-28
EP2734377B1 EP2734377B1 (en) 2015-09-09

Family

ID=44511319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12737894.1A Active EP2734377B1 (en) 2011-07-18 2012-06-15 Materials and process for making decalcomanias

Country Status (4)

Country Link
EP (1) EP2734377B1 (en)
ES (1) ES2555142T3 (en)
IT (1) ITRM20110372A1 (en)
WO (1) WO2013011530A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1420347A (en) 1921-12-27 1922-06-20 Frank A Spencer Device for raising and supporting covers
US2104025A (en) * 1934-08-23 1938-01-04 Mclaurin Jones Co Decalcomania paper
GB1312635A (en) * 1970-08-28 1973-04-04 Keramik Wtb Veb Dry transfer for the decoration of a silica article
US3956558A (en) 1972-11-03 1976-05-11 Commercial Decal, Inc. Ceramic decalcomania and method
EP0669215B1 (en) 1994-02-25 1998-01-28 Kyoto Ceramic Art Kyodokumiai Decalcomania for on-glaze decoration of ceramic ware
GB2289866A (en) * 1994-06-03 1995-12-06 British Ceramic Res Ass Method for forming curable decal
ATE319544T1 (en) 2000-06-21 2006-03-15 Westerwaelder Blumentopffabrik METHOD FOR PRODUCING CERAMIC VESSELS PROVIDED WITH DECORATIONS AND DEVICE FOR CARRYING OUT THE METHOD
US20040105966A1 (en) 2002-11-29 2004-06-03 Giuseppe Zambelli Decalcomania-like member with an anti-slip pattern or image for manufacturing an anti-slip ceramic product and a method for manufacturing such anti-slip product
IT1391909B1 (en) 2008-11-24 2012-02-02 Baltea D C Srl PROCEDURE FOR DECORATING A MANUFACTURING INCLUDING THE USE OF A CERAMIC TONER AND A SPECIAL SHEET OF SUPPORT WITH AN ANTI-ADHESIVE PROPERTIES FOR THIS PROCEDURE.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013011530A1 *

Also Published As

Publication number Publication date
ITRM20110372A1 (en) 2013-01-19
WO2013011530A1 (en) 2013-01-24
EP2734377B1 (en) 2015-09-09
ES2555142T3 (en) 2015-12-29

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