Learning Goal: Build a professional Tech Pack containing flat technical sketches, point-of-measurement (POM) spec sheets, and a complete Bill of Materials (BOM).

 

Complete Lesson Content: A Tech Pack (Technical Package) is the master blueprint of a garment. It communicates every design detail, construction method, dimension, trim, and packaging requirement to the factory. A clear Tech Pack eliminates guesswork, minimizes sampling iterations, and acts as a legally binding quality contract.Essential Components of a Tech Pack

  1. Technical Sketch (Flats): Black-and-white 2D vector drawings showing front, back, and side views with callouts for stitching details.
  2. Bill of Materials (BOM): An itemized table listing every physical component required to make one garment.
  3. Measurement Specification Sheet (Spec Sheet): A detailed table of Points of Measurement (POM) for all sizes (S, M, L, XL) with allowable tolerances (+/- 0.5 cm).
  4. Colorway & Print Placement Sheet: Pantone color assignments and print/embroidery coordinates.
  5. Packaging & Labeling Instructions: Hangtag placement, folding instructions, and polybag warning label specs.

+———————————————————————–+

|                         SAMPLE TECH PACK LAYOUT                       |

+———————————————————————–+

| [Flat Sketch: Front & Back]       | [Bill of Materials – BOM]         |

| Callouts:                         | – Main Fabric: 100% Cotton Fleece |

|  – 2×2 Ribbed Cuffs               | – Trim: YKK Metal Zipper (#5)     |

|  – Double-needle stitching        | – Thread: Core-spun Polyester     |

+———————————–+———————————–+

| [Measurement Spec Sheet (POM)]    | [Colorway & Artwork Specs]        |

| – Chest Width (1/2): 56cm         | – Body Color: Pantone 19-4005 TCX |

| – Body Length: 72cm               | – Logo: Screen Print (Chest, 10cm)|

+———————————————————————–+

 

  • Definitions:
    • Tech Pack: A digital blueprint containing full manufacturing specifications for a garment.
    • BOM (Bill of Materials): A comprehensive inventory list of raw materials, trims, packaging, and labels needed to assemble a garment.
    • POM (Point of Measurement): Designated measurement lines on a garment (e.g., chest width, sleeve length, collar drop).
    • Tolerance: The allowable margin of error (+/- limit) in finished garment measurements during mass production.
  • Step-by-step Explanation:
    • Draw Flat Vectors: Create front/back technical sketches in Adobe Illustrator or Techpacker without shadows or artistic rendering.
    • Compile the BOM: List every item down to thread type, brand labels, polybags, and silica gel packets.
    • Establish Measurement Specs: Set base size measurements (usually Size Medium) and establish grade rules for sizing up and down.
    • Set Tolerances: Define acceptable variance (e.g., +/- 1cm for chest width, +/- 0.5cm for neck drop).
    • Issue Version Control: Label document as “TechPack_Hoodie_v1.0” to track adjustments during sampling.
  • Best Practices:
    • Include clear arrow annotations showing exact placement for graphics, chest logos, and care tags.
    • Keep measurement tables metric (centimeters) for Asian and European factories, or include dual metric/imperial tables.
  • Common Mistakes:
    • Sending artistic fashion illustrations instead of flat, precise 2D vector drawings.
    • Forgetting secondary trims like care labels, wash tags, size stickers, and master carton packaging tape in the BOM.
  • Real Industry Example: Nike uses standardized cloud-based Tech Pack databases across hundreds of contract factories worldwide, ensuring a Size Medium sweatshirt fits identically regardless of where it is sewn.
  • Mini Case Study: Scenario: A designer creates a tech pack but forgets to specify thread color and stitch type for the hem of a navy dress. The factory uses standard white thread and a basic chain stitch, which pops when stretched. Solution: The brand had to pay for manual rework. Including stitch codes (e.g., ISO 406 coverstitch) and matching Pantone thread codes in the BOM avoids this issue.
  • Practical Activity: Draft a 1-page Bill of Materials (BOM) in Excel or Google Sheets for a classic denim jacket, including fabric, buttons, rivets, thread, leather patch, and care label.
  • Assignment: Create a complete 3-page Tech Pack template (Flat Sketch Page, BOM Page, Measurement Spec Page with 5 POMs) for a unisex crewneck t-shirt.
  • Lesson Summary: A Tech Pack is an essential production blueprint. Complete Tech Packs with accurate BOMs and POM measurement tables prevent production delays and costly manufacturing errors.
  • Key Takeaways:
    • No production should begin without a signed, version-controlled Tech Pack.
    • The BOM must detail every single component, including labels, thread, and packaging.
    • Clear measurement tolerances keep factory production within acceptable
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