WO1993006942A1 - Procede d'impression a l'aide de matieres visqueuses micro-encapsulees a teneur elevee en solides et produit obtenu - Google Patents

Procede d'impression a l'aide de matieres visqueuses micro-encapsulees a teneur elevee en solides et produit obtenu Download PDF

Info

Publication number
WO1993006942A1
WO1993006942A1 PCT/US1992/008590 US9208590W WO9306942A1 WO 1993006942 A1 WO1993006942 A1 WO 1993006942A1 US 9208590 W US9208590 W US 9208590W WO 9306942 A1 WO9306942 A1 WO 9306942A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
printing
raised
solid
substrate
Prior art date
Application number
PCT/US1992/008590
Other languages
English (en)
Inventor
Christopher Tararuj
Stephen Martin
Original Assignee
Webcraft Technologies, Inc.
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 Webcraft Technologies, Inc. filed Critical Webcraft Technologies, Inc.
Publication of WO1993006942A1 publication Critical patent/WO1993006942A1/fr

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
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/02—Letterpress printing, e.g. book printing
    • B41M1/04—Flexographic printing
    • 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
    • B41M3/006—Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles

Definitions

  • This invention relates to a method of printing with viscous, high solids, and, particularly, icroencapsulated materials.
  • This invention specifically pertains to any method of printing which utilizes a raised impression to impart a printed image, such as letterpress, dry-offset, and flexographic printing.
  • the viscous or high solids material or microcapsule core material used in the present invention may include thermochromic materials, photochromic materials, dyes, fragrances, fragranced powders, other chemicals, and the like.
  • printing There are several types of printing which incorporate the use of a raised impression to create a printed image. These printing types include letterpress, dry-offset, and flexographic printing.
  • letterpress printing the image or printing area is raised above the non-printing area, and ink is applied to the raised surface which is brought into direct contact with the paper or other surface to be printed on.
  • dry offset printing the ink or coating is transferred from the ink fountain to an intermediate series of rollers and then to the raised image. The image is transferred to a blanket and then offset onto paper or another substrate.
  • flexographic printing such printing is a preferred method of printing in certain applications, particularly on materials such as paper, plastic films, metal or foil, drawn aluminum cans, etc.
  • Flexographic printing utilizes an ink distribution system involving an anilox ink-metering roll, commonly in conjunction with an ink supply and an optional reverse-angle doctor blade assembly.
  • the flexo ink distribution system operates by flooding the surface of the anilox roll with ink, thus filling the cells on the surface of the anilox roll.
  • Anilox rolls typically have from 10 to 500 lines per inch (about 4 to 200 lines per centimeter) .
  • the reverse- angle doctor blade shaves the surplus ink flush with the surface of the lands on the surface of the anilox roll, and the resulting uniformly metered ink film is applied to the surface of the printing plate.
  • the printing plate has a raised surface or type which, when inked and impressed upon a substrate, yields a printed image on the substrate.
  • the inks used in letterpress and dry-offset printing can vary somewhat in viscosity, from under 500 cps for a letter press-type news ink to over 5,000 cps for special litho inks formulations. Lower viscosity inks are preferred so as to minimize the need for a multitude of rollers in the ink distribution unit to ensure uniform and adequate transfer of ink to the printing plate and provide for a high quality printed image.
  • the inks used in flexographic printing are commonly even less viscous fluids, typically on the order of 50-100 cps, so as to enable the transfer of ink from the anilox roll to the printing plate and then to the substrate to be printed with a minimum of undesirable striations or "chicken tracks" in the printed image.
  • the more viscous the ink and/or the fewer the number of cells on the anilox roll the more pronounced are the striations and chicken tracks in flexographic printing.
  • such materials include microencapsulated materials wherein, for example, the core materials include thermochromic materials, dyes, photochromic materials, fragrances, other chemicals, and the like.
  • Silk screen and gravure printing have been used with laicroencapsulated materials, but letterpress, dry- offset, and flexographic printing have not yielded satisfactory results with such materials. Since these microencapsulated materials must usually be applied to a substrate in a relatively high quantity (e.g., at least about 2.5 microns in thickness and more typically about 25-75 microns in thickness) , the microencapsulated materials cannot acceptably be diluted to render them useful for application by flexography. Letterpress and dry-offset typically cannot apply a sufficient quantity of ink and maintain adequate print quality. Accordingly, viscous, high solids, and microencapsulated materials continue to be applied to substrates primarily by screen printing and gravure printing, rather than by letterpress, dry- offset, and flexographic printing.
  • Coarser anilox e.g., 20-110 lines per inch (about 4-
  • the present invention serves to overcome these problems by providing for a method for the letterpress, dry-offset, and flexographic printing of viscous, high solids, and microencapsulated materials which enables an adequate coating of material to be imparted to the substrate to be printed, while maintaining an acceptable print quality.
  • the present invention achieves this result through use of particularly designed printing plates in conjunction with the proper coordination of transfer rolls, anilox type, and material quantities to be ultimately transferred to the substrate to be printed.
  • commercial quality printing can be achieved with viscous, high solids, and microencapsulated materials utilizing letterpress, dry-offset, and, particularly, flexographic printing.
  • U.S. Patent 4,028,118 discloses microencapsulated thermochromic materials (e.g., col. 9, line 52, through col. 10, line 30, and Examples 30-40) which may be dispersed in a printing ink vehicle to form a printing ink composition suitable for application to substrates in conventional manners, e.g., intaglio, relief, lithographic, or other printing methods (e.g., col. 12, line 31, through col. 13, line 57, and Examples 50-57) . While some of the thus prepared printing ink compositions are purportedly suitable as flexographic ink (e.g., Example 54), there is no discussion of the resulting quality of the printed image or the manner of improving such by use of the present invention.
  • flexographic ink e.g., Example 54
  • U.S. Patent 4,086,054 discloses concentrated solutions of alkylbenzenesulfonates of basic dyes in alcohols, glycols, and glycol ethers (e.g., " col. 1, lines 8-11) . These solutions are purported to be particularly suitable for producing waterfast prints, colorations, script, and markings and may be used to prepare flexographic inks (e.g., col. 3, lines 39-47). While some of the concentrates were reportedly used to prepare flexographic inks (e.g., Examples), there is no discussion of the application of such inks to prepare printed images or of the quality of printed images attainable with such inks.
  • thermochromic materials that may be included in microcapsules (e.g., col. 3, lines 3-8, and col. 8, line 24, through col. 9, line 25). These thermochromic materials are said to be useful as printing inks which can be applied by letterpress, intaglio, flexographic, and screen printing and so forth (e.g., col. 12, lines 14-18).
  • U.S. Patent 4,425,161 discloses thermochromic materials which may be microencapsulated (e.g., col. 8, line 18, through col. 9, line 46), used to prepare thermochromic printing ink (col. 16, lines 33-38), and applied by letterpress, intaglio, lithographic, and screen printing and so forth (e.g., col.
  • U.S. Patent 4,428,978 discloses a process for preparing concentrated microcapsule suspensions, particularly of encapsulated dye precursors, for use in the production of partly coated systems by the rotogravure and flexographic processes (e.g., col. 1, lines 14-18, and col. 5, lines 12-34).
  • the microencapsulated material was applied to a paper substrate by means of a soft rubber sheet in a flexograph machine (e.g., Example 6), the use of the material was for the purpose of preparing carbonless copying paper, and, therefore, there was no direct evaluation of the quality of any printed image.
  • thermochromic composition which can be used in the form of a solution, emulsion, dispersion, or encapsulated composition and which may further include various other chemicals such as dyes, perfumes, and the like
  • thermochromic composition When the thermochromic composition is to be used for printing, it is dissolved or emulsified in a printing ink vehicle or is encapsulated and admixed therewith. The resulting ink is then applied by a known printing method as by gravure, offset, flexso, screen printing, or spraying (e.g., col. 5, lines 36-49). There is no example of microencapsulated materials actually being applied by way of flexographic printing.
  • thermochromic ink e.g., col. 3, lines 50- 56
  • thermochromic ink e.g., col. 3, lines 50- 56
  • U.S. Patent 4,936,916 discloses ink compositions containing microencapsulated thermochromic materials, dyes, perfumes, and the like (e.g., col. 1, lines 5- 16, and col. 6, lines 3-11).
  • the ink compositions allegedly can be printed on a substrate by silk screen printing, flexographic printing, gravure printing, or the like (e.g., col. 1, lines 28-39, and col. 8, lines 15-23) .
  • flexographic capsule ink compositions were reportedly prepared (e.g., Examples), the use of the compositions was to prepare pressure sensitive recording sheets, and, accordingly, the quality of a printed image was not directly evaluated.
  • the present invention pertains to a method of letterpress, dry-offset, and flexographic printing with viscous, high solids, and microencapsulated materials through use of a series of either solid (i.e., continuous) or broken fine lines as the raised image or type used to impart the image to a substrate.
  • the present invention is a method of printing an image using a raised image, e.g., letterpress, dry-offset, and flexographic printing, with viscous, high solids, and microencapsulated materials comprising transferring such material from a source of the material to a roll or rolls, transferring the material from the roll(s) to a plate cylinder having a raised image or type, and impressing a substrate onto the plate cylinder such that the material on the raised image or type of the plate cylinder is transferred to the substrate to form an image thereon, wherein the raised image or type predominantly consists of lines of about 1 mm or less in width. Solid printed areas can be obtained by use of such lines spaced about 0.2-1 mm apart such that the material imparted to the substrate fills the intervening spaces between such lines.
  • a raised image e.g., letterpress, dry-offset, and flexographic printing
  • An object of the present invention is to provide a method of raised image printing such as letterpress, dry-offset, and flexographic printing with viscous, high solids, and microencapsulated materials to yield printed images of acceptable quality.
  • Another object of the present invention is to eliminate striations and chicken tracking in images printed with viscous, high solids, and microencapsulated materials using flexography and similarly minimize distortion of the printed image in letterpress and dry-offset printing.
  • a further object of the present invention is to impart a more uniform and aesthetically acceptable solid coating of viscous, high solids, and microencapsulated materials to substrates using letterpress, dry-offset, and flexographic printing.
  • FIGURE 1 is a schematic overview of a typical flexographic printing process
  • FIG. la is a close- up of a small portion of the surface of the anilox roll depicted in FIG. 1.
  • FIG. 2 depicts a preferred raised image for use in conjunction with the present invention.
  • FIG. 3 depicts another preferred raised image for use in conjunction with the present invention.
  • FIG. 4 depicts a preferred raised image with continuous line cross-hatching for use in conjunction with the present invention to yield a solid printed image on a substrate.
  • FIG. 5 depicts a preferred raised image with broken line cross-hatching for use in conjunction with the present invention to yield a solid printed image on a substrate.
  • FIG. 6 depicts a preferred raised image with modified broken line cross-hatching for use in conjunction with the present invention to yield a solid printed image on a substrate.
  • the present invention provides a method of letterpress, dry-offset, and, particularly, flexographic printing with viscous, high solids, and microencapsulated materials utilizing a raised image or type predominately consisting of fine lines. While the present invention is described with an emphasis on flexographic printing, the present invention is also applicable to other raised image printing such as letterpress and dry-offset printing.
  • flexographic printing typically involves transferring printing material such as an ink composition from a source 11 of such material, usually in conjunction with a reverse-angle doctor blade assembly 12, to an anilox roll 13.
  • Figure la is a close-up of a small portion of the surface of the anilox roll 13.
  • the anilox roll 13 has on its surface a series of cells 14 formed by crisscrossing ridges 15, which cells 14 are capable of retaining the printing material.
  • Anilox rolls typically have from 10 to 500 lines or ridges per inch (about 4-200 lines or ridges per centimeter) and may employ a variety of cell designs.
  • the surface of the anilox roll 13 is flooded with printing material from the printing material source 11, thus filling the cells 14 on the surface of the anilox roll 13.
  • the reverse-angle doctor blade 12 shaves the surplus ink flush with the surface of the lands or ridges 15 on the surface of the anilox roll 13.
  • the anilox roll 13 is in contact with a plate cylinder 16 which has a raised image or type on its surface corresponding to the image to be ultimately printed.
  • the raised image or type is typically made of rubber or synthetic material and preferably has a Durometer hardness of about 60-65. As the anilox roll 13 rotates, it transfers printing material to the raised image or type of the plate cylinder 16.
  • the plate cylinder is also in contact with the substrate 17 to be printed on, such that the printing material on the raised image or type of the plate cylinder 16 is transferred to the substrate 17 to produce the desired image thereon.
  • An impression cylinder 18 is also typically employed to ensure adequate contact between the plate cylinder 16 and substrate 17.
  • any usual or modified flexographic printing apparatus or process can be used in the context of the present invention.
  • modified printing material sources, different blade assemblies, and additional transfer rolls can be utilized.
  • anilox rolls can be used, such as, for example, the AMS and QCH anilox rolls sold by Consolidated Engravers Corporation (Charlotte, NC) and the ROTO-FLO anilox roll offered by Pamarco Inc. (Summit, NJ) .
  • Other, modified anilox rolls are also described in U.S. Patent 4,301,583.
  • the various modified rolls, which purportedly help reduce striations in printed images may, as part of the present inventive method, yield further improvements to the quality of the printed image.
  • the present invention has particular usefulness in flexographic printing, the present invention has applicability to other raised image printing processes such as letterpress and dry-offset printing and variations of those processes.
  • the printing method of the present invention is designed to provide printed images of acceptable quality and uniform coverage with the use of viscous, high solids, and microencapsulated materials.
  • Some such materials have heretofore been capable of being letterpress, dry-offset, or, particularly, flexographic printed to only form images of unsatisfactory or inferior quality, in particular with considerable striations and chicken tracks, low concealment value, low color density, and non-uniform coatings.
  • Viscous, high solids, and microencapsulated materials suitable for use with the present invention include, for example, inks with a viscosity of 50- 5,000 cps or more and materials such as DATRIMTM (3M, St.
  • microencapsulated materials wherein the core material comprises thermochromic compounds, photochromic compounds, dyes, fragrances, powders, other chemicals, and the like, wherein the viscosity of such microencapsulated materials ranges from about 50-5,000 cps or more.
  • the microcapsules are generally of a size of about 30 microns diameter or less, preferably about 2-30 microns diameter, and most preferably less than 10 microns diameter.
  • High solids materials may contain up to about 75% or more solids and retain printability with use of the present invention. Suitable viscous, high solids, and microencapsulated printing materials are disclosed in the references discussed above. See also U.S.
  • the raised type on the plate cylinder which forms the printed image should predominately consist of lines of about 1 mm or less in width, preferably about 0.5 mm or less in width, and most preferably between about 0.1 mm and about 0.5 mm in width.
  • the use of lines of greater than 1 mm in width generally results in printed images with decreasing print quality with increasing line width.
  • An illustrative typeface for use with the present invention is depicted in Figure 2, wherein lines 21, 22, and 23 represent raised typeface lines of 0.2 mm width to produce the printed image "A".
  • Larger profile images can be printed through use of outlines, as depicted in Figure 3, wherein lines 31 and 32 represent raised typeface lines of 0.2 mm width to produce the printed outline image "A" with open non- printed area 33.
  • Solid areas of acceptable quality can be printed through use of the present invention by employing a raised type containing an area of lines, preferably parallel and as described above, which are separated from each other by about 0.15 mm to about 1.5 mm, preferably about 0.2 mm to about 1 mm, and most preferably about 0.2 mm to about 0.5 mm.
  • the printed material depending on the quantity and viscosity of the printing material, nature of the substrate, transfer roll design, and pressure with which the raised type is contacted with the substrate to be printed, will flow to fill in the spacing between these lines such that the area will result in a solid or substantially solid printed image on the substrate.
  • Such solid coverage also allows for hiding existing images on substrates without the need for a second coating and while maintaining aesthetically appealing print quality.
  • FIG. 4-6 Examples of such a cross-hatched raised type to produce a solid image are depicted in Figures 4-6, wherein continuous lines 41-43 and broken lines 51 and 61 represent raised typeface lines of about 0.2 mm width and cross-hatch lines 43, 51, and 61 are separated from each other by 0.5 mm, such that a large solid printed "A" ( Figure 4) or triangle ( Figures 5-6) results.
  • the cross- hatch lines may be of any suitable configuration, e.g., solid or continuous lines ( Figure 4), broken lines ( Figure 5) , or modified broken lines in the shape of circles ( Figure 6) .
  • the size of the solid printed area can be controlled by the amount of cross- hatched lines and/or the spacing between the lines.
  • lines 31-32 of Figure 3 can be spaced more closely together, e.g., 0.2 mm apart, so as to fill-in open area 33 and produce a solid printed image "A”
  • additional lines parallel to lines 31-32 of Figure 3 could similarly be added to produce an enlarged solid printed image "A”
  • lines 41-42 of Figure 4 could be spaced more closely together or further apart, with an appropriate decreased or increased amount of cross-hatched lines 43, to yield a smaller or larger solid printed image "A”.
  • the spacing between lines to yield the desired image depends on a number of factors including material viscosity, rheology and solids content, as well as the nature of the transfer roll(s) , e.g., anilox cell configuration in a flexographic printing process.
  • the present inventive method of printing with viscous, high solids, and microencapsulated materials can be used to print images on any suitable substrate, including, for example, various papers, metals, plastics, foils, and virtually any substrate which can be printed utilizing a raised impression image.
  • the amount of printing material transferred to the plate cylinder, and then ultimately to the substrate to be printed may vary depending on a number of considerations, including the nature of the transfer roll such as the number of cells on the anilox roll in flexographic printing, the desired coating thickness of the printed image, and the pressure with which the plate cylinder and substrate to be printed are contacted to form an image, as well as the number, thickness, and proximity of the lines of the raised image and the viscosity, rheology, and percent solids of the printing material.
  • the anilox roll may be of any suitable design and will generally contain about 10-500 lines per inch (about 4-200 lines per centimeter) , more typically about 25-110 lines per inch (about 9-45 lines per centimeter) .
  • anilox rolls of about 200 lines per inch may also be satisfactorily used provided that the anilox is flooded with printing material.
  • anilox rolls of about 10-350 lines per inch (about 4-140 lines per centimeter) are preferably utilized, most preferably anilox rolls of about 25-165 lines per inch (about 9- 65 lines per centimeter) .
  • the smaller the number of cells per square centimeter on the anilox roll the thicker the printed image line formed from a given raised typeface line and the greater the distance between lines which will be filled in to yield a solid printed area.
  • a 25 Quad anilox can be run to transfer about 14 cubic millimeters per square centimeter of viscous or encapsulated material to the plate cylinder and cause an area of 0.2 mm width cross-hatch raised typeface lines spaced 0.5 mm apart to produce a solid printed area.
  • the non-print area (e.g., space between the raised typeface lines) of the plate cylinder is believed to compensate for the otherwise usual printed image distortion in the form of striations and chicken tracking resulting from the flexographic printing of viscous, high solids, and encapsulated materials by allowing the relatively thick printing material to spread out with minimal overlapping.
  • This technique can be used in any application where a uniform coating of a viscous, high solids, or microencapsulated material is to be applied on a substrate.
  • the present inventive printing method can be used for microencapsulated fragrance slurry application to provide for substantially complete coverage of microcapsules in fragrance pull-apart samplers, thereby ensuring satisfactory release of the fragrance by increasing the number of microcapsules burst upon sampler opening, and minimizing fiber tear of the paper sampler caused by nonuniform microcapsule application.
  • the minimum volume necessary to print a satisfactory pull-apart fragrance sampler is approximately 10-20 mm 3 /cm 2 .
  • This quantity of material is quite difficult to print using a standard solid or screened flexoplate due to the pronounced non- uniformity exhibited by film split or film separation marks and overall striations. This is a well-known phenomenon in printing but is especially pronounced when applying heavy coatings such as are desirable with microencapsulated fragrance material. Pull-apart fragrance samplers with such striations and film separation marks are commercially unacceptable.
  • a series of dots are utilized to print fragrance microcapsules in order to provide a semblance of uniformity.
  • the present invention allows for coverage of a greater surface area and consequently increases the number of microcapsules efficiently broken upon pulling apart of the sampler. More efficient breakage of capsules per unit area results in higher "lift" of the fragrance (since more oil is released) . This increased efficiency allows for the application of fewer microcapsules per unit area, and, since fewer unbroken microcapsules remain, a significant savings can be realized, especially when high-priced oils are used.
  • the present invention therefore, allows for improved fragrance sampler quality as well as reduced cost.
  • thermochromic and photochromic materials which are typically microencapsulated.
  • the microcapsule content In order to apply a sufficient quantity of such material to a substrate, the microcapsule content must be at least about 10-25%, preferably more. The lower the microcapsule content, the fainter the image and the higher the volume of material that must be transferred to the substrate.
  • An application of about 0.5-1 mm 3 /cm 2 is generally suitable for a legible image, but about 1.5-3 mm 3 /cm 2 is more desirable. It is difficult to maintain image clarity and quality, however, adhering to such specifications. In general, as with the fragrance application described above, the greater the quantity that is transferred, the more pronounced is the desired effect, but the print quality adversely suffers and is aesthetically unacceptable.
  • thermochromic products With the present invention, much more desirable material volumes of about 18-22 mm 3 /cm 2 or more can be printed satisfactorily. Such application rates allow for a wide range of utilization for the thermochromic products not previously possible, particularly with flexography.
  • the present invention allows for the use of a smaller quantity of material to provide the desired coverage, enabling, for example, the use of a much reduced quantity of material to conceal existing images on a substrate, e.g., "secret messages" and the like.
  • presently utilized methods have provided for a solid coverage (e.g., black square, circle, etc.) prepared from thermochromic ink, which when heated, disappears and reveals an image, e.g, a message indicating a prize that may have been won in a contest.
  • the lines comprising the raised image used in the present invention carry a quantity of material which yields a dark image, and, as discussed above, when the lines are brought into close proximity to each other, the area between the lines can be forced to fill in on the printed substrate to provide high hiding power.
  • the present invention thus offers significant advantages in connection with concealed images.
  • the resulting contrasting darker and lighter areas made possible by use of the present invention with raised lines of varying proximity provide improved hiding power, by confusing and not allowing the eye of a viewer to focus on a single color or plane, similar to the function of the "Chinese pattern" commonly used in print game applications. Since solid coverage is not necessary, and maximum color density covers only about 50 to 80 percent of the concealment area, a raw material saving is made possible. If a second coating is desirable to conceal, for example, a high color density or black image or four color process picture with a high color density coating, the second coating can be printed at a perpendicular or intersecting angle to the first and provide even greater hiding power, still at a saving compared to two-coat solid maximum color density printing using screen process or gravure printing.
  • the second coating can be of a different color than the first coating to further improve concealment, and/or reduce the total quantity of coating material while maintaining a given concealment level, by providing for increased camouflage and increased hindrance of the ability of a viewer to discern the hidden image or message.
  • the present invention can also be used to provide a tinted or clear glossy or matte image or coating over an existing thermochromic or photochromic image which is thereby rendered undiscernible until an external stimulus reveals the thermochromic or photochromic image.
  • DATRIMTM (3M, St. Paul, Minnesota) type materials which comprise as much as 80-90% solids by volume.
  • the present invention can be utilized to achieve maximum concealment with a high solid, high viscosity, non- encapsulated material.
  • high viscosity and high solids are not necessarily synonymous, in general the higher solids materials are of higher viscosities, and it is advantageous to utilize the highest solids possible for concealment, conductivity, or whatever is desired, while maintaining maximum print quality.
  • the present invention provides a means for doing so with raised image printing, e.g., letterpress, dry-offset, and, particularly, flexographic printing.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Printing Methods (AREA)

Abstract

Procédé d'impression d'images sur plaque d'acier, telles que la typographie, la typographie indirecte, et notamment l'impression flexographique, à l'aide de matières visqueuses micro-encapsulées à teneur élevée en solides, et produit obtenu. Dans ledit procédé, on utilise une série de traits fins (41, 42, 43) comme image ou caractère en relief afin de transférer l'image sur un substrat. L'image imprimée pouvant former une image pleine avec un espacement suffisamment étroit des traits, peut prendre la forme d'une seconde image sur une première image afin de la dissimuler. Soit la première image soit la seconde image peuvent être imprimées à l'aide d'une encre thermochromique ou photochromique, laquelle, lors de son activation par une stimulation externe permet de rendre la première image visible.
PCT/US1992/008590 1991-10-11 1992-10-08 Procede d'impression a l'aide de matieres visqueuses micro-encapsulees a teneur elevee en solides et produit obtenu WO1993006942A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77607491A 1991-10-11 1991-10-11
US776,074 1991-10-11

Publications (1)

Publication Number Publication Date
WO1993006942A1 true WO1993006942A1 (fr) 1993-04-15

Family

ID=25106384

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/008590 WO1993006942A1 (fr) 1991-10-11 1992-10-08 Procede d'impression a l'aide de matieres visqueuses micro-encapsulees a teneur elevee en solides et produit obtenu

Country Status (1)

Country Link
WO (1) WO1993006942A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635378A2 (fr) * 1993-07-22 1995-01-25 Saint-Gobain Vitrage Forme d'impression pour procédé d'impression typographique et utilisation de la forme pour l'impression sur des surfaces dures non absorbantes
EP0774951A1 (fr) * 1994-09-30 1997-05-28 Chromatic Technologies, Inc. Compositions d'encres thermochromiques, vernis a ongle et procedes d'utilisation
EP0967084A1 (fr) * 1998-06-24 1999-12-29 I.P.S. S.r.l. International Products & Services Procédé pour l'impression en continu ou discrète de cristaux liquides, matériau thermochromes et/ou photochromes
US6863720B2 (en) * 2001-06-08 2005-03-08 Matsui Shikiso Chemical Co., Ltd. Thermosensitive color-changing dry offset ink and a printed material using the same
DE102005003839A1 (de) * 2005-01-27 2006-08-03 Koenig & Bauer Ag Sicherheitsmarkierung
WO2007091166A2 (fr) * 2006-02-08 2007-08-16 Mikael Anthony Ford Latif Décalcomanie parfumée
WO2013159104A1 (fr) * 2012-04-20 2013-10-24 Excel Retail Solutions, LLC Récipient de conditionnement de produit de scellage à froid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227719A (en) * 1978-09-20 1980-10-14 Burroughs Corporation Protection system for documents
US4241942A (en) * 1979-06-25 1980-12-30 Dittler Brothers, Inc. Secure contest card
US4717710A (en) * 1985-01-17 1988-01-05 Matsui Shikiso Chemical Co. Ltd. Thermochromic composition
US4927180A (en) * 1986-08-22 1990-05-22 Plessey Overseas Limited Marking of articles with photochromic compounds
US5017225A (en) * 1987-12-02 1991-05-21 Japan Capsular Products Inc. Microencapsulated photochromic material, process for its preparation and a water-base ink composition prepared therefrom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227719A (en) * 1978-09-20 1980-10-14 Burroughs Corporation Protection system for documents
US4241942A (en) * 1979-06-25 1980-12-30 Dittler Brothers, Inc. Secure contest card
US4717710A (en) * 1985-01-17 1988-01-05 Matsui Shikiso Chemical Co. Ltd. Thermochromic composition
US4927180A (en) * 1986-08-22 1990-05-22 Plessey Overseas Limited Marking of articles with photochromic compounds
US5017225A (en) * 1987-12-02 1991-05-21 Japan Capsular Products Inc. Microencapsulated photochromic material, process for its preparation and a water-base ink composition prepared therefrom

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635378A2 (fr) * 1993-07-22 1995-01-25 Saint-Gobain Vitrage Forme d'impression pour procédé d'impression typographique et utilisation de la forme pour l'impression sur des surfaces dures non absorbantes
EP0635378A3 (fr) * 1993-07-22 1995-11-29 Saint Gobain Vitrage Forme d'impression pour procédé d'impression typographique et utilisation de la forme pour l'impression sur des surfaces dures non absorbantes.
EP0774951A1 (fr) * 1994-09-30 1997-05-28 Chromatic Technologies, Inc. Compositions d'encres thermochromiques, vernis a ongle et procedes d'utilisation
EP0774951A4 (fr) * 1994-09-30 1999-04-07 Chromatic Tech Inc Compositions d'encres thermochromiques, vernis a ongle et procedes d'utilisation
EP0967084A1 (fr) * 1998-06-24 1999-12-29 I.P.S. S.r.l. International Products & Services Procédé pour l'impression en continu ou discrète de cristaux liquides, matériau thermochromes et/ou photochromes
US6863720B2 (en) * 2001-06-08 2005-03-08 Matsui Shikiso Chemical Co., Ltd. Thermosensitive color-changing dry offset ink and a printed material using the same
DE102005003839A1 (de) * 2005-01-27 2006-08-03 Koenig & Bauer Ag Sicherheitsmarkierung
US7677455B2 (en) 2005-01-27 2010-03-16 Koenig & Bauer Ag Safety marking
WO2007091166A2 (fr) * 2006-02-08 2007-08-16 Mikael Anthony Ford Latif Décalcomanie parfumée
WO2007091166A3 (fr) * 2006-02-08 2007-12-06 Mikael Anthony Ford Latif Décalcomanie parfumée
WO2013159104A1 (fr) * 2012-04-20 2013-10-24 Excel Retail Solutions, LLC Récipient de conditionnement de produit de scellage à froid

Similar Documents

Publication Publication Date Title
JP2829099B2 (ja) 紙幣用紙印刷用凹版印刷機
US5630363A (en) Combined lithographic/flexographic printing apparatus and process
KR100809562B1 (ko) 잉크젯 인쇄용 전사지
CA1304894C (fr) Encres a vacuoles
DE3751107T2 (de) Bildformung auf gegenstände.
US3980018A (en) Special intaglio printing process for preventing forgery of securities
US2268594A (en) Process of letterpress printing
DE1471694A1 (de) Kupferdruckverfahren und -Maschine sowie mit diesen hergestellte bedruckte Traeger
WO1993006942A1 (fr) Procede d'impression a l'aide de matieres visqueuses micro-encapsulees a teneur elevee en solides et produit obtenu
US5656331A (en) Printed substrate having a metallic finish and method for producing same
JP4184555B2 (ja) レインボー印刷可能なフレキソ印刷方法
JP3336483B2 (ja) 熱転写シート及びその製造方法
US6718874B2 (en) Apparatus and method for eliminating dot gain in flexographic printing systems
CN100372896C (zh) 胶乳聚合物基印刷油墨
EP1832433B1 (fr) Procédé et installation pour gaufrer et imprimer des feuilles
JPH0930154A (ja) カラー印刷物
DE2130914A1 (de) Intaglio-Druckverfahren
US20210129518A1 (en) Method of Printing
CA2382456A1 (fr) Appareil d'impression et procede correspondant destines a empecher l'apparition de bandes ou de rayures sur un substrat imprime
US20070144382A1 (en) Lightened offset plates, preparation and use thereof
JPH0641224B2 (ja) 組合せ印刷方法
JP3634118B2 (ja) 押印用ラベルおよびその連続体
DE4422846C1 (de) Druckverfahren und Druckklischee für den indirekten Tiefdruck
Panák Printing techniques-what is beneath?
du Plessis PRINTING PROCESSES AND TECHNIQUES ON SOUTH AFRICAN STAMPS: 1910 TO 2010

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL SE

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA