Tech pack and design services in Bangladesh

A tech pack is the garment written down: sketches, measurements, materials, construction and packing, on pages a factory can price and sew from. Tech pack and design services in Bangladesh cover the step between a design you have decided on and a sample that matches it. Brands with a designer but no technical team, and buyers starting from a reference garment, use them so the first sample is not a guess.

This is technical design, not fashion design: nobody draws your collection, forecasts trends or picks your colours. The desk does not write tech packs as a service. Its merchandiser reads yours, asks for the missing fields before a factory quotes, and checks each sample against it. The factory's pattern room builds the pattern and grades it from your tech pack, a reference garment or a sketch with quantities. Your tech pack and pattern are used for your order only.

How tech pack and design services in Bangladesh work

Tech pack from a sketch

You send a flat or hand sketch with fabric, size range and quantities. The factory's pattern room drafts the pattern and a first measurement chart, and the desk sends you the open fields to fill before the proto. Suits designers who know the look but not the numbers.

Tech pack from a reference garment

A garment you sell or like, sent to the factory, measured point by point and copied with your changes marked on it. The quickest route to a proto, because the fit already exists; the measurements the factory takes become the base of your chart.

Grading

The base size turned into a size range by the factory's pattern room, with a grade rule for each point of measure matched to the market you sell in. You approve the rule before a size set sample is cut.

Bill of materials and trim card

Every fabric, trim, label and packing item with its colour, size and quantity per garment, and the supplier if nominated. The factory builds the trim card from your list as it costs the garment, so the quote and the buying agree.

Updates after sampling

Comments from each sample round written back into your tech pack by you, so the PP sample is built from one current document instead of a trail of emails. The desk inspects each sample against the latest version you send.

What goes into a tech pack

Flat sketches

Front and back technical drawings with stitch lines, pocket positions and detail callouts. Not a fashion illustration: proportions must agree with the measurements.

Measurement chart and tolerances

Every point of measure with how to measure it, the base size value and a tolerance, often 1 cm either way on body points and 0.5 cm on small ones.

Bill of materials

Fabric, lining, interlining, thread, zips, buttons, labels and packing, each with composition, colour, size and any nominated supplier.

Construction notes

Seam types, stitches per inch, seam allowances, topstitch widths and edge finishes. Often left blank, and then filled by the factory's habit.

Colourways and artwork

Each colourway with its colour standards, and artwork files with print size and placement for every garment size.

Labels and packing

Positions of main, care and size labels, the hangtag, fold, polybag and carton instructions, in the format your market expects.

Pass lines

The shrinkage limit, colour fastness grades and any market rule, so the factory knows what bulk must pass before it samples.

Tests and rules to write into a tech pack

ISO 5077 with ISO 6330

Write the shrinkage limit and the wash procedure into the spec, so the pattern is cut to it and the result can be checked.

ISO 105-C06 and ISO 105-X12

State minimum grey scale grades for washing and rubbing fastness, so a pass or fail is clear before the lab report arrives.

EN 14682

For children's clothing sold in the EU. A hood drawcord drawn on the sketch for younger sizes will fail it, so design it out at the tech pack stage.

ISO 2859-1

Name the AQL in the tech pack, so the final random inspection runs to the level you set rather than a default.

What moves the cost of pattern and tech pack work

• Starting point: a reference garment is quicker to specify than a sketch alone.
• Garment complexity: a lined jacket has many more points of measure and parts than a tee.
• Size range, and grading for more than one market's size system.
• Number of colourways and artwork placements to document per style.
• Revision rounds, as each sample's comments are written back into the pack.

Lead time for tech packs and design

A factory's pattern room usually needs a few working days per style to build a pattern from a reference garment or a clean sketch before the proto can start; a lined jacket takes longer than a tee. Pattern work usually sits inside the sample charge, which is quoted with the price and credited against the order on most runs. The proto then follows the 7 to 14 day sample window. Time spent on the pack first usually saves a fit round later, because the factory is not filling gaps with its own guesses.

What we check in tech packs and design

• Measurements agreePoints of measure are checked against each other and against the sketch, so chest, length and sleeve do not contradict.
• BOM covers every partEvery trim on the sketch appears in the bill of materials with a quantity, so nothing is bought short.
• Even grade stepsGrade steps are checked for even progression across sizes, a common source of size set rejections.
• Label text by marketCare, fibre and origin label text is checked against the market named on the order before labels are printed.

Questions buyers ask about tech packs and design