By Arnold R. Lang
Dyes and pigments are ingredients that impart color to a fabric. The time period colorant is frequently used for either dyes (also known as dyestuffs) and pigments. the most important distinction among dyes and pigments is solubility (the tendency to dissolve in a liquid, particularly water). Dyes are typically soluble - or should be made to be soluble - in water. as soon as a dye is dissolved in water, the cloth to be dyed should be immersed within the dye answer. because the fabric soaks up the dye and dries, it develops a color. If the cloth then keeps that color after being washed, the dye is related to be colourfast.Pigments are normally now not soluble in water, oil, or different universal solvents. To be utilized to a fabric, they're first floor right into a high quality powder and carefully combined with a few liquid, known as the dispersing agent or car. The pigment-dispersing agent combination is then unfold at the fabric to be colored. because the dispersing agent dries out, the pigment is held in position at the fabric. regularly, dyes are used for colouring textiles, paper, and different elements, whereas pigments are used for coloring paints, inks, cosmetics, and plastics. This ebook provides new and important learn from worldwide during this box.
Read or Download Dyes and Pigments: New Research PDF
Similar polymers & textiles books
This e-book covers the main major points of adsorption via carbons, trying to fill the prevailing hole among the fields of adsorption and carbonaceous fabrics. either uncomplicated and utilized points are awarded. the 1st component to the booklet introduces actual adsorption and carbonaceous fabrics, and is through a bit about the basics of adsorption through carbons.
A complete survey of the ordinary fibres – animal, vegetable and mineral – on which we depended for our textiles till relatively lately.
Nanotechnology is revolutionising the area of fabrics. this crucial booklet experiences its effect in constructing a brand new iteration of fabric fibers with more advantageous performance and quite a lot of purposes. the 1st a part of the booklet studies nanofiber construction, discussing how diverse fiber kinds should be produced utilizing electrospinning options.
Delivering a complete evaluate of the state of the art complicated learn within the box, Polymer Physics explores the interrelationships between polymer constitution, morphology, and actual and mechanical habit. that includes contributions from well known specialists, the publication covers the fundamentals of significant components in polymer physics whereas projecting into the longer term, making it a necessary source for college kids and chemists, chemical engineers, fabrics scientists, and polymer scientists in addition to execs in comparable industries.
- Natural and Wood Fibre Reinforcement in Polymers
- Blowing Agents and Foaming Processes 2010 Conference Proceedings
- Food Contact Materials - Rubbers, Silicones, Coatings and Inks
- Fatigue Failure of Textile Fibres (Woodhead Publishing Series in Textiles)
Extra resources for Dyes and Pigments: New Research
It is approved in several countries for treatment of chorioidal neovascularization caused by AMD but also due to other macular disease (pathologic myopia, ocular histoplasmosis). Verteporfin is effective in therapy solely , but it is investigated also in combination therapy with other drugs used for treatment of chorioidal neovascularization. It may be administered together with antiangiogenic drugs (ranibizumab, pegaptinib or bevacizumab) or steroids (dexamethasone, triamcinolone acetonide or anecortave acetonide).
The photodynamic potential of rose bengal (RB) (Figure 9) was confirmed in both physico-chemical  and cell culture experiments [290, 291] as well as against viruses . Since the relatively selective uptake of the RB by tumor cells unlike of normal cells, the dye was selected by the Provectus Photodynamic Therapy 31 Pharmaceuticals Inc. (USA) as promising candidate for treatment of some cancer and other lesions . Currently it is in the phase I study for treatment of recurrent breast carcinoma, phase II study for treatment of metastatic melanoma and phase II study in form of topical aqueous gel for photodynamic therapy of psoriasis .
In the case of 5-ALA, the formation of mainly 2,5-dicarboxyethyl-3,6dihydropyrazine [164-166] via an open-chain ketimine 5-ALA dimer was observed. Porphobilinogen  and pseudoporphobilinogen [165, 167] were described to arise as minor side-products. Similarly to biosynthetic steps to subsequent hem intermediates, the amino and carbonyl groups are included in the dimerization reaction . In the presence of oxygen, the dihydropyrazine derivative is further oxidized to the 2,5-dicarboxyethylpyrazine Photodynamic Therapy 19 [165, 168].