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....DYEING , PRINTING AND FINISHING DEFECTS AND REMEDIES….
Slide 2
Causes Of Dyeing Defects
Slide 4
Dyeing Defects
Bleeding
Slide 7
Shade Bar
Hole in sulfur dyed fabric
Off Shade
Uneven Dyeing
Batch to batch Shade Variation
Patchy Dyeing Effect
Roll to Roll Variation
Crease Mark
Printing Defects
Flushing/Wicking
Slide 18
Misfits
Banding
Unwanted pigment marking on fabric
Crack or miss alignment in transfer printed fabric.
Slide 23
FABRIC FINISHING
Slide 25
Slide 26
Slide 27
Decolorized patch on fabric
Slide 29
Sanforize Pucker
Bowing
Pilling
Water Spots
Cuts or Nicks
Slide 35
Nội dung
DYEING , PRINTING AND FINISHING DEFECTS AND REMEDIES…. ! "# $ " #%"# & %'$!$ $(& – ( – )*%* – (! – (! – +! – – ,! – - %'$!$ $./!& – ( – . – – . $,$! & – , – , – , Dyeing Defects 0 • ,1! 2 • ! • ! ! ! • ,3 • ,! • !4 4! % 0 • , 3 • ,!! ! • % * 5 • 6 * '3 • ,75! • !!! !! [...]... of textiles FABRIC FINISHING • The most simple form of finishing is the ironing or pressing on the fabric • In finishing , the fabric is subjected to mechanical and chemical treatment in which its quality and appearance are improved and its commercial value enhanced • Physical finishing techniques(dry finishing processes) or chemical finishing methods(wet finishing) are used FABRIC FINISHING • Functional... screen and eventual damage or just improper exposure to light Crack or miss alignment in transfer printed fabric • Incomplete transfer of design from paper to fabric on transfer printing due to removal of transfer of paper while the fabric was still hot Finishing Defects FABRIC FINISHING • A series of processing operations applied to gray fabrics to enhance their appearance and hand, properties and. .. Wearability, Hand, Mechanical resistance, Easy care, Wettability, Washability, Deformability, Anti bacterial, Anti fungal, Soil-proof and Fire-proof ability • Aesthetic finishes: – Aesthetic looks Unwanted marks on fabric • Oily stains with dust adhered to surface which makes the stains more prominent and difficult to remove, due to contact with oil or grease covered exposed machine parts, careless handling...Uneven Dyeing Batch to batch Shade Variation Patchy Dyeing Effect Roll to Roll Variation Crease Mark Printing Defects Flushing/Wicking • Caused due to Low viscosity of print paste • It occurs when the printed area bleeds out into the unprinted area The result... • Usually caused by finishing • Woven filling yarns lie in an arc across fabric width; in knits the course lines lie an arc across width of goods • Establish standards of acceptance Critical on stripes or patterns; not as critical on solid color fabrics Pilling • Pilling is a common fabric defect occurring on knitted and woven fabrics • In producing a yarn, long fibers tightly-twisted produce a serviceable... print over another color Banding • Defect created by the print head’s movement over the substrate • Use of scanning print head, or a print head that moves back and forth across the substrate in straight line placing drops of ink at precise locations along the line • If the head is not properly aligned, or if the substrate advances unevenly, the result is a slight horizontal “band” or line of unprinted... stable fibers are mixed into the yarn the result is a yarn that will not hold together The short staple fibers will separate from the yarn and curl up in a ball, forming what is referred to as a pill • Pilling is accentuated by the friction of normal wear, washing and routine dry cleaning Water Spots • Usually caused by wet fabric being allowed to remain too long before drying; color migrates leaving... to remain too long before drying; color migrates leaving blotchy spots Selvage Torn • Usually caused by excessive tension while processing through tenter frames Cuts or Nicks • Caused by indifferent handling of scissors snips or mechanical trimmers Soil Caused by oil, grease or dirt Often times originating from a dirty work area or machinery not properly cleaned . DYEING , PRINTING AND FINISHING DEFECTS AND REMEDIES . . & – , – , – , Dyeing Defects 0 • ,1! 2 • ! • ! ! ! • ,3 • ,! • !4 4! % . & %'$!$ $(& – ( – )*%* – (! – (! – +! – – ,! – - %'$!$ $./!& – ( – . – – . $,$!