What does a tech pack look like?

A tech pack looks like a small stack of pages, each answering a different factory question, rather than one drawing. One page identifies the style. Others describe its shape, construction, finished measurements and materials. The pages belong together because the workroom needs all of those decisions to make the same garment.

There is no single layout that every factory requires. A useful tech pack example makes information easy to find, keeps the same style reference on every sheet and shows which version is current. A page can look tidy and still leave an essential decision unwritten. The test is whether someone can use it without asking what you meant.

Start with the lead sheet

The lead sheet is the front of the pack. It usually carries the style name or reference, date, revision, base size and an overall view of the garment. A factory uses it to check that the pages, sample and correspondence refer to the same style. Those identifiers matter more than a large logo or a decorative cover.

For a peplum shirt, the picture should show the collar, long sleeves, cuffs and gathered lower section clearly enough to recognise the design. If there are several colourways, name them consistently. A cover showing an old sleeve length can cause confusion before the machinist reaches the construction page.

Flats show the complete garment

Technical flats usually show the front and back without a posed body. Seams, openings, darts, gathers and topstitching should be visible. The back is not an optional extra just because the front contains most of the design detail. Back yokes, closures and shaping still have to be cut and sewn.

A small detail drawing can sit beside the main flat when scale would hide the instruction. A centre-front placket may need an enlarged view to show button spacing, stitch lines and the way its lower end finishes. A drawing marked “included” should contain that information, not simply reserve an empty space for a later decision.

Construction and seams answer different questions

Construction pages explain how the parts are assembled. They can show a collar section, the attachment of a cuff or the join between the bodice and peplum. Leaders point to the relevant area. Notes name the operation, finish and any dimensions that the drawing alone cannot establish.

A seams page is more specific about how an edge or join is sewn. It may show seam allowance, stitch type and which side receives the topstitching. For sheer fabric, the finish is visible through the garment, so “finish neatly” is not enough. The workroom needs to know which finish was approved and where it applies.

The spec page pairs arrows with measurements

A specification sheet combines a points-of-measure diagram with a measurement chart. Each arrow has a reference that matches a row. The row names the measurement, unit, base-size value and agreed tolerance. A reader should not have to guess which number belongs to a sleeve arrow or whether a width is measured flat.

For example, a bust measurement taken just below the armhole is not automatically the same as one taken at the fullest part. The diagram should locate the line and the measuring method should explain how the garment lies. See what a garment spec sheet contains for the decisions behind those rows.

Materials, labels and colourways need their own decisions

The bill of materials names each fabric, interlining, thread and trim, with a reference, placement and quantity or consumption basis. A button row should say more than “buttons”. Size, colour, finish and the colourway it belongs to affect what the factory buys. The list should also distinguish approved components from items still awaiting confirmation.

Label information can occupy a separate page if placement, folding or artwork needs room. Show where the neck label attaches and how the care label sits in the seam. Do not assume a rectangular label drawing gives the factory permission to choose its dimensions or print its content.

A colourway page connects the main fabric and every changing trim to a named combination. If the darker body uses a different button, state it. Repeating a fabric swatch without checking thread, labels and interlining leaves the factory with an incomplete colour instruction.

Grade rules and revisions complete the instruction

Grade rules explain the steps from the base size to the rest of the size range. They can appear in a chart alongside the base measurements or on a separate sheet. A statement that grading is included should identify the size range and rules supplied. It does not, by itself, mean a full set of graded pattern files is attached.

The revision log records what changed, when it changed and which version replaces the previous one. A revised cuff measurement should agree with the flat, construction note and spec row. Updating only the cover date makes the pack look current without making its instructions consistent.

Read an example as a working document

When looking at a tech pack layout, follow one detail through the pages. Find the placket on the flat, its finish in construction, its length on the spec and its buttons in the materials list. The references should lead to one decision, not four slightly different versions.

A blank template can help organise headings, but it is not a factory-ready pack. Empty cells do not tell a workroom what to make. An example is useful when it shows the level of detail your own style needs, rather than encouraging you to copy another garment’s measurements.

For the wider definition, read what a tech pack is. For the writing order, use how to make a tech pack. Start from the approved garment, then check that every page describes that same version before sending the set.