Page 140 - CTS - Sewing Technology - TP - Volume - 2-0

SEWING TECHNOLOGY - CITS

Causes

• Low quality base fabric
• Improper leveling agents
• Incorrect pH in the production process
• Dye machine entanglement
Prevention

Ensuring there are no initial problems with the base fabric prior to stitching can help prevent dye marks. Any
issues missed will be present in later production processes.
Other preventative measures include maintaining the correct pH level, using an appropriate dying agent and
using a backup power generator to ensure production machines don’t shut down during use.
5 Drop Stitches
One of the most common quality issues found in raw textiles, drop stitches are holes or missed stitches that
appear randomly in the fabric. (Fig 5)
Causes
Drop stitches are typically caused by:

• Incorrect set-up of yarn carriers
• Slubs and knots
• Yarn overfeeding or underfeeding
• Loose stitching during the production process

Prevention
Checking the yarn carrier and any other machines to verify they’re set to the right tension during production can
prevent drop stitches. You can minimize the occurrence of drop stitching in your fabric or textile by regulating the
yarn feed rate.
Resetting the pattern chain can fix this issue.
6 Misprinting, OFF Printing or Absence Of Printing

Misprint defects are only relevant to printed fabrics. Misprint is when the print of the fabric does not match your
specified design. This is usually displayed in one of the following ways:
Causes

• Colors and/or patterns are completely or partially missing
• Colors and patterns are incorrectly positioned relative to each other
Prevention (Fig 6)

Fig 5 Fig 6

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CITS : Apparel - Sewing Technology - Exercise 30 CITS : Apparel - Sewing Technology - Exercise 30