Textile chemical Dictionary

TEXTILE CHEMICAL DICTIONAREY Prepared By : Mazadul Hasan sheshir ID: 2010000400008 13 th Batch (session 2009-2013) Department : Wet Processing Technology Email: mazadulhasan@yahoo.com Blog : www. Textilelab.blogspot.com (visit) Southeast University Department Of Textile Engineering I/A 251,252 Tejgaon Dhaka Bangladesh  reacve dyes, rst developed by Imperial Chemical Industries of Britain, and designated “Procion MX”; chemically MX dyes belong to the dichlorotriazene family A number of companies now manufacture MX dyes.   !"#"   !"        "      "     #   $   % !"   !  polyamide used for bres and solid plasc & '"' ( "))")*+, - .""/ 0 1"2""   [...]... synthetic and natural dyes In terms of health risks of repeated exposure, 1 It is one of the most hazardous chemicals used by textile art dyers 2 It is corrosive to tissues and can cause ulceration 3 It is known to be a human carcinogen 4 It poses serious disposal problems 5 Do not use this chemical unless you have consulted and understood a material safety data sheet(msds) 6 for it and have the necessary... that will not be removed by such a limited process Sequestering agent Sequestering Agent (or sequestrant) - A chemical compound that tends to bind some ‘species’ such as metal ions and keep them from being available to participate in other chemical reactions; also called chelating agents Chemicals such as sodium hexametaphosphate, citric acid or EDTA , the choice depending on considerations such as... require large amounts of electrolyte (salt) in most processes, and extensive rinsing and hot washing after dyeing to remove Reducing Agent Reducing Agent - A chemist’s term for any chemical that causes gain of electrons by another chemical with which it 1 reacts; the reducing agent is itself oxidized (see oxidizing agent) in the process Many reducing agents are used in dyeing processes 2 They include thiourea... discharge pastes to protect the ground color dye and/or improve the sharpness of edges of the discharge 4 This term is a bit misleading: don’t confuse resist salts with chemicals used to keep dye from fixing to the fibre Retarder Retarder - A chemical added to a dye bath to reduce the rate at which dye attaches to the fibre; also called leveling agents 1 A retarder may be required to prevent a dye from... dye from attaching, or by quickly attaching to the dye, temporarily keeping the fibre from attaching to the dye 4 Simple chemicals such as sodium sulfate may act as retarders for some dyes in some conditions 5 There are many retarders on the market that are proprietary mixtures of chemicals, often formulated to be companions for specific dye families 6 Reserving agents can be thought of as a special... particularly high-density polyethylene (HDPE), is a good choice for containers for many dyeing processes 2 It has good chemical resistance, but generally should not be subjected to boiling water (see polypropylene for an alternative) 3 A great deal of the commercial packaging for household chemicals and food products is made from polyethylene 4 Some fabric sizing compounds and softening compounds are polyethylene... useful, just slightly weaker 5 Shelf life is generally maximized by storage at low temperature (sometimes even freezing, but this can damage some products) 6 Chemicals should also usually be protected from long exposure to bright light, and dry chemicals should be protected from humidity by storage in tightly closed moisture-proof containers ... near the boil 1:1 types are usually applied at very low pH, often with formic or sulfuric acid in quite large quantities, while 2:1, sometimes called “neutral dyeing”, are often applied using acid donor chemicals, so the bath is nearly neutral at the start an becomes more acid with continued boiling Prepared for dyeing Prepared for dyeing - A fabric or garment that is specially made to be dyed; sometimes... resistance to chlorine bleach 2 There are several broad classes of reactive dyes Most are intended for cellulose fibres, but some are intended specifically for wool 3 The most popular reactive dye family for textile artists is the Procion® MX family 4 Other reactive dye families reasonably available to art dyers include Procion® H, Procion® H-E, Remazol®, and Cibacron® F (equivalents to the MX, H, H-E and... specific companies) 5 Reactive dyes may be more expensive than other dye families suitable for the same fibres, especially when very dark or dull colors are considered 1 They are the newest class of textile dyes, first introduced commercially, for cellulosic fibres, in 1956 , one hundred years after the development of the first synthetic dye 2 Within a family, the range of colors available as “pure” . TEXTILE CHEMICAL DICTIONAREY Prepared By : Mazadul Hasan sheshir ID: 2010000400008 13 th Batch (session. Processing Technology Email: mazadulhasan@yahoo.com Blog : www. Textilelab.blogspot.com (visit) Southeast University Department Of Textile Engineering I/A 251,252 Tejgaon Dhaka Bangladesh  reacve.  reacve dyes, rst developed by Imperial Chemical Industries of Britain, and designated “Procion MX”; chemically MX dyes belong to the dichlorotriazene family A number