{"id":1101,"date":"2026-05-31T14:13:07","date_gmt":"2026-05-31T14:13:07","guid":{"rendered":"https:\/\/cogarm.com\/?p=1101"},"modified":"2026-05-31T14:30:45","modified_gmt":"2026-05-31T14:30:45","slug":"tech-pack-tolerance-guide-oeko-tex-vs-gots-specs","status":"publish","type":"post","link":"https:\/\/cogarm.com\/es\/tech-pack-tolerance-guide-oeko-tex-vs-gots-specs\/","title":{"rendered":"How to Read a Technical Specification (Tech Pack)"},"content":{"rendered":"

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How to Read a Technical Specification (Tech Pack)<\/h1>\n

A technical specification\u2014often called a tech pack\u2014is the blueprint for your product. It tells a manufacturer exactly what to make, how to make it, and what standards to meet. Learning to read one correctly saves time, reduces errors, and ensures your product matches your vision.<\/p>\n

1. Understand the Header Information<\/h2>\n

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Every tech pack starts with a header. This section includes the product name, style number, season, and date. It may also list the designer, brand, and target market. Always check that the header matches your purchase order or design brief. A mismatch here can cause confusion later.<\/p>\n

2. Review the Bill of Materials (BOM)<\/h2>\n

The BOM lists every component in the product: fabrics, trims, threads, zippers, buttons, labels, and packaging. Each item should have a supplier code, color reference, and quantity per unit. Look for notes on alternative materials or approved substitutes. If a material is listed as \u201cTBD\u201d (to be determined), flag it before production begins.<\/p>\n

3. Examine the Technical Drawings<\/h2>\n

Flat sketches show the product from front, back, and side views. They include construction details like seam types, stitch counts, and pocket placements. Callouts (arrows or circles) point to specific features. Compare these drawings to your original design to ensure proportions and details are correct.<\/p>\n

4. Check the Measurement Spec Sheet<\/h2>\n

This is a table of critical measurements for each size. It includes body length, chest width, sleeve length, waist, and more. Each measurement has a tolerance (e.g., \u00b1 0.5 cm). Pay attention to \u201cpoint of measure\u201d diagrams\u2014they show exactly where to measure. If a measurement falls outside tolerance, the garment may not fit properly.<\/p>\n

5. Read the Construction Notes<\/h2>\n

These notes describe how the product is assembled. They cover stitch types, seam finishes, hem styles, and reinforcement areas. Look for instructions on topstitching, bar tacks, or specific thread tensions. If you see a note like \u201cmatch stripe at side seam,\u201d it means the fabric pattern must align\u2014a detail that affects fabric yield and cost.<\/p>\n

6. Understand the Grading Rules<\/h2>\n

Grading shows how measurements change between sizes. For example, a shirt might increase 1 cm in chest per size. The grading rule is usually listed as a table or formula. If you plan to offer extended sizes, confirm the grading is consistent and proportional.<\/p>\n

7. Review Labeling and Packaging Instructions<\/h2>\n

This section specifies care labels, content labels, brand tags, and hang tags. It also includes packaging details like polybag type, barcode placement, and carton quantities. Errors here can lead to returns or fines, so verify every label matches your brand guidelines.<\/p>\n

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8. Look for Quality and Testing Requirements<\/h2>\n

Many tech packs include a section on testing standards. This may cover colorfastness, shrinkage, seam strength, or flammability. The manufacturer will use these to validate the product before shipment. If no testing is listed, ask your supplier what standards they follow by default.<\/p>\n

9. Check the Revision History<\/h2>\n

A tech pack is a living document. The revision history shows changes made over time\u2014date, description, and who approved them. Always work from the latest revision. Using an old version can result in incorrect production.<\/p>\n

10. Common Mistakes to Avoid<\/h2>\n