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AcademySewing, Construction and Production Management

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What this lesson answers

Stitch and Seam Science — questions covered in this lesson

  • What is the difference between lockstitch and chainstitch?
  • How do you read a stitch and seam notation like 401/SSa?
  • What stitch density (SPI) should be used on a woven seam?
  • Which seam type is strongest for a load-bearing garment seam?
  • How does stitch type affect seam stretch and strength?

Key terms

stitch typesseam typesstitch density SPIlockstitch and chainstitchseam strengthseam allowance

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