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Chapter 8 1. The use of computers for color shade matching in textile dyeing affected global trading in the textile and apparel markets because (these systems enable the dyers to rapidly produce the original color formulations, is also capable of monitoring the dyeing for samples and later larger-scale production, it can take the spectrophotometer reading of the sample, scan the computer memory, mathematically mix the dyes to reproduce the original sample shade, out put dye formulas, can be commanded to give a formula that produces the lowest cost, and alternatively provide any given colorfastness requirement) buyer and seller can then communicate this out put instantaneously anywhere in the world, undertaken approval or correction by fax or phone, and move toward production and delivery in a matter of hours instead of days and weeks needed to approve visual sample in the past. 2. a) Three ways in which pigments differ from conventional dyes insoluble water and don’t unite or combine in a way with textile fiber, microscopic colored chips that may be held on the surface of a fiber by resin-binding agents, can only be applied to fabrics as a solid color of as prints. b) How differences affect the colored fabric pigments don’t combine or react with the textile fibers the can be used with any fiber or combination of fibers, excellent colorfastness to light, shows loss of color and fading, crocking, dark shades are more visually affected than the lighter shades. 3. Apparel manufacturers usually exercise great care to ensure that all common components of the same sewn garment (back, front, sleeves, etc.) are from the same dye lots because of they aren’t then the dye will vary making the product look odd, some dyes may be darker, or lighter, may fade quicker, there may be streaks or stains on some of the pieces, tender spots, uneven shading, color bleeding, or it may be off shade. 4. a) The phenomenon known as metamerism is not likely to occur on two different dye lots of the same color, each dyed by the same dyer only because metamerism happen when the dyer components for the shade being matched one chemically different from the original. b) It’s especially important that retail and fashion buyers who bur coordinated outfits be careful of metamerissm because the dye components for the shade are chemically different which means that depending ton the light they may differ from each other, the color may fade easier, etc..
Approximate Word count = 1548
Approximate Pages = 6.2
(250 words per page double spaced)
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