Air Permeability Test by Shirley Air Permeability Apparatus Air permeability: The air permeability of a fabric is the volume of air measured in cubic centimeters passed per second through 1 cm2 of the fabric at a pressure of 1 cm of water. Air resistance: The air resistance of a fabric is the time […]
Dyeing Auxiliaries | Function of Auxiliaries | Dyeing Method of Vat Dye | part 02
Vat dye | Why called vat dye | Vat dye properties | Uses of Vat dye | Classification of Vat dye | The 1N (indanthrene normal) group | The IW (indanthrene Warm) group | The IK group | Anthraquinonoid | Indigoid | Dyeing of cotton with vat dye | Vat dyeing recipe | Part 01 […]
Collagen: Changing the Course of the Future
Collagen: Changing the Course of the Future Muh. Amdadul Hoque , Md. Iftekhar Mahmood Department of Fabric Engineering famous American architect and inventor R. Buckminster said, “You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete.” It is in this spirit that the predictions […]
Polysaccharide Thickeners
Polysaccharide Thickeners Introduction: Thickener is a colorless thick mass which imparts stickiness and plasticity to the print paste so that it may be applied on the fabric surface without bleeding or spreading and be capable of maintaining the design out lines. Polysaccharides: Nature has provided large quantities of many polymers that are soluble or dispersible […]
Dyeing of Cotton with Vat dye | Part 01
Vat dye Vat dye is one of the oldest types of dye. It is mainly suitable for cellulosic fibre for best overall fastness properties. Because of the popularity of blue jeans, indigo is still one of the most important dye in the world in the present time. Natural indigo was extracted by fermenting Indigofera tinctoria […]
Knitting Faults in fabric
Knitting Faults in fabric : Weft fabric faults, Causes and Remedies 1. Hole Mark Causes: ❶ Holes are the results of yarn breakage or yarn cracks. ❷ During loop formation the yarn breaks in the rejoin of the needle hook. ❸ If the yarn count is not correct on regarding structure, gauge, course and density. ❹ Badly […]
Drawing Of Synthetic Fibres
Drawing Of Synthetic Fibres Introduction: With the exception of silk , all the filaments are manufactured from man-made materials . silk is a natural filament. The man-made materials are primarily made from chemicals that must be formed and solidified into fibre form. The fibre forming polymers are normally solids and therefore must be first […]
Defects of Sulfur Dyeing Part 3
Part 01 :Introduction to Sulfur Dyes | History of Sulfur Dyes | Method of manufacture of Sulfur dye | Trade Names of Sulfur Dyes | Characteristics of Sulfur Dyes | Features of Sulfur Dye | Chemical Structure of Sulfur Dye | Chemical Nature of Sulfur Dyes | Chemistry of dyeing with Sulfur Dye Part […]
Classification of Sulpher Dyes Part 2
Part 01 :Introduction to Sulfur Dyes | History of Sulfur Dyes | Method of manufacture of Sulfur dye | Trade Names of Sulfur Dyes | Characteristics of Sulfur Dyes | Features of Sulfur Dye | Chemical Structure of Sulfur Dye | Chemical Nature of Sulfur Dyes | Chemistry of dyeing with Sulfur Dye Part […]
Introduction to Sulfur Dyes Part 1
Introduction to Sulfur Dyes Sulfur dyes are complex heterocyclic molecules or mixtures formed by melting or boiling organic compounds containing amino or nitro groups with Na-polysulphide and Sulfur. Sulfur dyes are so called as they all contain Sulfur linkage within their molecules. Sulfur dyes are highly coloured, water insoluble compounds and have to be […]