The dyeing process often requires several dozen gallons of water for each pound of clothing.
Coloured
embroidery digitizing designs in textiles can be created by weaving together fibres of different colours (tartan or Uzbek Ikat), adding coloured stitches to finished fabric (embroidery), creating patterns by resist dyeing methods, tying off areas of cloth and dyeing the rest (tie-dyeing), or drawing wax designs on cloth and dyeing in between them (batik), or using various printing processes on finished fabric.
Woodblock printing, still used in India and elsewhere today, is the oldest of these dating back to at least 220 CE in China.
Textiles are also sometimes bleached, making the textile pale or white.
BUTes has 15 workshops and 84,000 sq. ft area for laboratories.
School workshops and laboratories are:
· The Yarn Laboratory provides knowledge of yarn preparing and engineering technology both short staple (cotton) and long staple (jute). The laboratory facilities includes conventional and modern machinery with new technology like open-end spinning and air-jet spinning.
· The Fabric Laboratory has facilities for weaving cotton, synthetic and jute fabric including tappet, dobby and jacquard loom, hand operated loom, ordinary power loom, automatic power loom and modern loom with CAD system. Modern looms include air-jet loom, rapier loom with electronic jacquard, projectile looms.
· The Knitting Laboratory is equipped with warp and weft knitting machinery. Warp knitting machinery includes raschel and tricot machines and weft knitting machines include circular (single jersey, interlock, rib, jacquard) and flat knitting machines.
· The Wet Process Laboratory includes machinery for singeing, desizing, mercerizing, dyeing, printing and finishing. The laboratory can dye material as fibre, yarn and fabric form and style of printing. The laboratory has a computerized data colour system, gas chromatography and mass spectrophotometer, light fastness and other quality control equipment required to ensure dyeing and finishing qualities.
· The Apparel Laboratory is equipped with cutting, sewing and finishing machinery used in garments industry. The laboratory is equipped with Lectra CAD-CAM system for computerized marker making and cutting and garments dyeing, washing and embroidery machine.
· The Testing Laboratory can test fibre, yarn and fabric. The laboratory has testing machines including evenness testing, Classimat, single yarn strength tester, multifunctional Superba tester, HFT and electronic microscope.
· The Computer Laboratory provides a facility for 40 students at a time. There are facilities to use the internet for teachers and students.
· The Electronic Laboratory is also equipped with pneumatic and electro-pneumatic control systems.
· The Physics Laboratory is equipped with machinery and equipment for graduate students.
· The Chemistry Laboratory provides for 40 students at a time.
· The Mechanical Workshop has lathes, universal strength tester, shaping machine, cutting machine, drill machine, welding machine, circular saw, tools for carpentry and many other common and heavy industrial machines.
The structure of gender participation underwent a major shift with the rise of the ready-made
digitizing garment industry in Bangladesh.
Traditionally the participation of women in Bangladesh's formal economy was minimal.
Bangladesh's flagship export-oriented ready-made garment industry, however, with female labor accounting for 90 percent of the work force, was "built to a large extent, on the supply of cheap and flexible female labor in the country."