France: Toyo Ink – organic pigments & printing inks

2006 ◽  
Vol 2006 (9) ◽  
pp. 4
Keyword(s):  
Organic Pigments ◽  
Printing Inks

Metal complex pigments

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Robert Christie ◽  
Adrian Abel
Keyword(s):  
Metal Complex ◽  
Metal Ion ◽  
Copper Phthalocyanine ◽  
Research Effort ◽  
Iron Complex ◽  
Organic Pigment ◽  
Organic Pigments ◽  
Printing Inks ◽  
Green Pigments ◽  
Complex Organic

Abstract There are several commercially significant metal complex organic pigments that are based on first row transition metals. The most important of these are the copper phthalocyanine blue and green pigments which find virtually universal use in paints, printing inks, and plastics. These pigments are of such prime importance that they are dealt with separately in three other chapters in this series. This paper describes a group of pigments that are complexes of iron, copper, nickel, and cobalt with polydentate colored ligands of azo, azomethine, oxime, and isoindoline chemical types. The oldest metal complex organic pigment that still finds some use is CI Pigment Green 8, an octahedral oxime iron complex. In the 1970s and 1980s, there was considerable industrial research effort aimed at developing metal complex pigments based on azomethine and isoindoline structures, many of which were found to offer excellent lightfastness, good solvent resistance and thermal stability, although they exhibited rather dull colors. However, several products provide brilliant effects when used in combination with metallic and pearlescent pigments in automotive paints. Many of the pigments introduced have since been withdrawn by the original manufacturers, but a few remain on the market. The synthesis of metal complex pigments generally involves the preparation of the colored ligand, which is then complexed with the transition metal ion

Cationic (Basic) dye complex pigments

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Robert Christie ◽  
Adrian Abel
Keyword(s):  
Water Soluble ◽  
Cationic Dye ◽  
Color Strength ◽  
Organic Pigments ◽  
Basic Dye ◽  
Copper Ferrocyanide ◽  
Printing Inks ◽  
Good Transparency ◽  
Printing Ink

Abstract Cationic (or basic) dye complex pigments are classical organic pigments obtained from water-soluble cationic dyes for textiles, mainly of triarylmethine (arylcarbonium ion) types, which are precipitated using large inorganic counterions, especially those derived from heteropolyacids such as phosphotungstomolybdic acid or, to a certain extent, using the counteranion derived from copper ferrocyanide. This range of pigments includes red, violet, blue and green products, offering brilliant shades, high color strength and good transparency. They are well suited to printing ink applications, although they provide only moderate levels of fastness properties. The pigments are synthesized by treating aqueous solutions of the dyes under highly controlled conditions with solutions of the heteropolyacids, prepared in situ. The copper ferrocyanide salts are obtained by treatment of potassium ferrocyanide with sodium sulfite in water, and subsequently with solutions of the cationic dye and copper (II) sulfate. The pigments are primarily used in inks for packaging and advertising materials. However, they have little use outside printing inks. Reflex or alkali blue pigments are structurally related cationic dye derivatives which are inner salts of the dye structures and are also used in printing inks.

Phthalocyanine pigments: general principles

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Robert Christie ◽  
Adrian Abel
Keyword(s):  
High Stability ◽  
Copper Phthalocyanine ◽  
Electronic Devices ◽  
Molecular Structures ◽  
Biological Applications ◽  
Absorption Properties ◽  
Organic Pigments ◽  
Wide Range ◽  
Printing Inks ◽  
Structural Principles

Abstract This chapter describes some of the fundamental chemical and structural principles underlying the phthalocyanine system. Historically, phthalocyanines had been isolated as insoluble blue products in the early twentieth century, although the structures were not established at the time. After the serendipitous re-discovery of metal complex phthalocyanines by industry, and the elucidation of their structures, copper phthalocyanine (CuPc) pigments were introduced industrially in the 1930s to become, and remain, by far the most important blue and green organic pigments, finding almost universal use as colorants for paints, printing inks, plastics, and a wide range of other applications. The phthalocyanines have become one of the most extensively studied classes of organic compounds, because of their unique molecular structures, light absorption properties that produce strong, bright colors, and their exceptionally high stability. While their dominant use is as colorants, they are also of interest for a range of other applications, for example in electronic devices, biological applications, and as catalysts.

Synthesis of Historical Azo Pigments: The Challenge and Opportunity of the Nearly Forgotten

MRS Advances ◽  
2017 ◽  
Vol 2 (37-38) ◽  
pp. 2007-2019 ◽  
Author(s):  
Joseph F. Lomax ◽  
Suzanne Q. Lomax ◽  
Thomas J. T. Moore
Keyword(s):  
Mass Spectrometry ◽  
Laser Desorption ◽  
Gas Chromatography Mass Spectrometry ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Pyrolysis Gas ◽  
X Ray ◽  
Organic Pigments ◽  
Printing Inks ◽  
Mass Spectrometric Techniques

ABSTRACTSynthetic organic pigments (SOPS) find wide use in modern and contemporary works of art. These laboratory-made pigments are used in many fields, including industrial and architectural paints, printing inks, plastics, textiles, and artists’ materials. They have been examined by a variety of techniques including spectroscopic methods such as Fourier transform infrared spectroscopy (FTIR), Raman, and X-ray powder diffraction (XRD) as well as chromatographic or mass spectrometric techniques such as pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and laser desorption ionization mass spectrometry (LDI-MS). Often, a combination of techniques has been used to examine these pigments. Previously, we used a combination of Raman spectroscopy and LDI-MS to characterize commercially available SOPS. However, many pigments, termed “historical” are no longer manufactured, and therefore, may not have been characterized. This paper describes the synthesis of members of several classes of SOPS and their characterization.

Effect of ink and paperboard characteristics on flexographic print quality based on print density

TAPPI Journal ◽  
2011 ◽  
Vol 10 (9) ◽  
pp. 7-13
Author(s):  
KHODADAD MALMIRCHEGINI ◽  
FARSHAD SARKHOSH RAHMANI
Keyword(s):  
Water Absorption ◽  
Significant Influence ◽  
Particle Diameter ◽  
Print Quality ◽  
Printing Technology ◽  
Plastic Films ◽  
Printing Inks ◽  
Packaging Industry ◽  
Solids Content ◽  
Density Results

Flexography is an evolving printing technology that is suitable for printing on coated and uncoated paperboard and board, nonporous substrates including metalized and paperboard foils, and plastic films used especially in the packaging industry. This study evaluated the effect of paperboard and ink characteristics on flexographic print density in paperboard. Three commercial paperboards from different companies were prepared: brown kraft from Thailand, white kraft from Spain, and test liner from Iran. Four samples of process print inks from Iran were used in this investigation. Paperboard properties, such as roughness and water absorption, and ink characteristics, including solids content, PH and particle diameter, were measured. The inks were printed on paperboards using a roll no.15 applicator with a blade metering device, and the print densities were measured. Results showed that solids content, pH, and particle diameter of printing inks influenced print density, while the roughness and water absorption of the three types of paperboard had no significant influence on print density. Results also illustrated that two levels of ink viscosity (25–30 and 50–55 mPa·s) were insignificant to print density.

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