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Pollution from the international dye industry continues to be a global problem. Biotechnology offers new options, including a closer look at select wood decay fungi to replace inorganic dyes. The pigments produced by a small group of soft rotting fungi are generally naphthoquinonic and remarkably stable. From this group, the dramada crystals, produced by Scytalidium cuboideum, are of particular interest. To test the application of this pigment as a natural colorant of cellulosic pulps, four different bleached pulps were selected (one hardwood, three softwood), in three different mediums (acetone, ethanol, and DI water). The pigment generated a significant change of color, but there was no significant difference in color intensity based on the solvent carrier. These preliminary results are promising as they open the door for further exploration of applications of fungal pigments in the paper industry. Once these pigments can be reliably grown, they will offer a sustainable organic alternative to polluting inorganic dyestuffs and help reduce the toxic effluent released into the soil and waterways. [ABSTRACT FROM AUTHOR]

The dye and pigment manufacturing industry is one of the most polluting in the world. Each year, over one million tons of petrochemical colorants are produced globally, the synthesis of which generates a large amount of waste. Naturally occurring, plant‐based dyes, on the other hand, are resource intensive to produce (land, water, energy), and are generally less effective as colorants. Between these two extremes would be synthetic dyes that are fully sourced from biomass‐derived intermediates. The present work describes the synthesis of such compounds, containing strong chromophores that lead to bright colors in the yellow to red region of the visible spectrum. The study was originally motivated by an early report of an unidentified halomethylfurfural derivative which resulted from hydrolysis in the presence of barium carbonate, now characterized as a butenolide of 5‐(hydroxymethyl)furfural (HMF). The method has been generalized for the synthesis of dyes from other biobased platform molecules, and a mechanism is proposed. [ABSTRACT FROM AUTHOR]

The highly porous power plant waste ashes have been utilized to treat toxic effluent of a dyes manufacturing plant. An attempt has been made for the first time in Pakistan, to generate an effective and economically sound treatment facility for the toxic effluent of a dyes manufacturing plant. This is an indigenous bed which could replace expensive treatment facilities, such as reverse osmosis (RO), granulated activated carbon (GAC) bed, etc. The treatment efficiency was improved by coupling coagulants with fly ash adsorbent bed. The ash was collected from coal fired boilers of power plant at Lakhra Power Generation Company, Jamshoro, Pakistan. The use of this ash resolved the disposal and environmental issues by treating wastewater of chemical, dyes and pigment industry. The treatment bed comprised of briquettes of coal fly ash coupled with commercial coagulant ferrous sulfate-lime reduced COD, color, turbidity and TSS of effluent remarkably. An adsorption capacity and chemical behavior of fly ash bed was also studied. In coagulation treatment, coagulant FeSO4-lime influenced reduction of COD, color, turbidity and TSS by 32%, 48%, 50% and 51%, respectively. The CFAB coupled with coagulant, resulted an excessive removal of color, TSS, COD, and turbidity by 88%, 92%, 67% and89%, respectively. [ABSTRACT FROM AUTHOR]

New π-conjugated structures are constantly the subject of research in dyes and pigments industry and electronic organic field. In this context, the triphenodioxazine (TPDO) core has often been used as efficient photostable pigments and once integrated in air stable n-type organic field-effect transistor (OFET). However, little attention has been paid to the TPDO core as soluble materials for optoelectronic devices, possibly due to the harsh synthetic conditions and the insolubility of many compounds. To benefit from the photostability of TPDO in dye-sensitized solar cells (DSCs), an original synthetic pathway has been established to provide soluble and dissymmetric molecules applied to a suitable design for the sensitizers of DSC. The study has been pursued by the theoretical modeling of opto-electronic properties, the optical and electronic characterizations of dyes and elaboration of efficient devices. The discovery of new synthetic pathways opens the way to innovative designs of TPDO for materials used in organic electronics. [ABSTRACT FROM AUTHOR]

The article presents a guide to sources for dyes and pigments and contains paid listings of products that are manufactured or distributed by U.S. firms. It is suggested that this restriction is intended to assure that all products included in the guide are readily available to U.S. users. Also included are tables that contain information including names, addresses and telephone numbers of the companies wherein products are listed in the guide. According to the author, any U.S. producer or distributor of dyes and pigments can get a listing of products from the next issue of the said guide.

The article offers guide to sources for dyes, pigments and resin-bonded pigment colors which are available in the U.S. as of July 1994. The data are provided by the American Association of Textile Chemists and Colorists. This source contains listings of products that are either manufactured or distributed by the firms in the country. It offers names, addresses and telephone numbers of the producers and suppliers of the dyes and pigments. It also offers generic names for classifying commercial dyes and pigments with respect to their usage and their chemical constitution.

The article presents a guide to sources for dyes and pigments and contains paid listings of products that are manufactured or distributed by U.S. firms. It is suggested that this restriction is intended to assure that all products included in the guide are readily available to U.S. users. Also included are tables that contain information including names, addresses and telephone numbers of the companies wherein products are listed in the guide. According to the author, any U.S producer or distributor of dyes and pigments can get a listing of products from the next issue of the said guide.

The article presents a guide to sources for dyes and pigments and contains paid listings of products that are manufactured or distributed by U.S. firms. It is suggested that this restriction is intended to assure that all products included in the guide are readily available to U.S. users. Also included are tables that contain information including names, addresses and telephone numbers of the companies wherein products are listed in the guide. According to the author, any U.S producer or distributor of dyes and pigments can get a listing of products from the next issue of the said guide.

The article offers guide to sources for dyes, pigments and resin-bonded pigment colors which are available in the U.S. as of July 1984. The data are provided by the American Association of Textile Chemists and Colorists. This source contains listings of products that are either manufactured or distributed by the firms in the country. It offers names, addresses and telephone numbers of the producers and suppliers of the dyes and pigments. It also offers generic names for classifying commercial dyes and pigments with respect to their usage and their chemical constitution.

The article reports market study results for the U.S. chemical, polymer, and textile industries and compares statistics and estimates for the period between 1976 and 1981. The study results were announced by E. G. Hochberg and Associates of Chester, New Jersey. Statistics are provided for cost estimates for dyes, pigments, and chemical specialties; sales totals for comparative periods; production quantity increases for printed fabric, printed carpeting, pigment printing, transfer printing, and rotary screen printing.