A tech pack with 14 pages of sketches but no stitch density spec will stall your sample approval by at least three days, and that is if the factory asks. Most mid-size China factories do not ask. They sew to the nearest standard they know, then you pay for a second sample round. The gap between what you think you specified and what the factory actually received is the single largest source of lead time overruns in womenswear OEM. Close it before you send the file, not after the first proto arrives. ## The Minimum Spec Set That Gets a Quote Every factory can quote from a sketch and a fabric note, but that quote carries hidden assumptions about seam allowance, hem finish, and buttonhole spacing. A complete tech pack for a woven dress, for example, specifies seam allowance at 1.2 cm on side seams and 2.5 cm on the hem, with a 0.6 cm allowance on the neckline facing. Those numbers change cutting yield, sewing time, and thread consumption, so they change the price. Without them, your quote is a guess dressed as a number. Include these minimums: – Bill of Materials with actual supplier codes, not generic "lining" or "button" placeholders. – Construction sheet with seam and stitch type references, using ASTM or ISO codes where possible. – Measurement chart with tolerance ranges, not single target numbers. – Color callouts with Pantone TCX references, plus finish type such as matte or semi-gloss. – Print placement diagram with repeat size and registration marks for engineered prints. – Label and packaging instructions, including hangtag attachment point and polybag spec. ## What Factories Do With Missing Specs When you omit a construction detail, the factory fills it from their own standard library. That library was built for their highest-volume client, not for your brand. A missing topstitch spec becomes a 1/16 inch single needle chainstitch because that is what runs fastest on their line. A missing hem allowance becomes 1 inch because their marker maker defaults to it. These are not wrong choices, they are choices made without your input. You discover them when the sample arrives, and by then the pattern is cut and the fabric is ordered. The correction costs you both time and fabric, and the factory charges a revision fee because the spec was not clear. ## The Spec Sheet as a Negotiation Tool A detailed spec sheet shifts the negotiation from price to method. When you specify a felled seam at 1.5 cm, the factory can tell you that a 1.2 cm flat felled seam reduces sewing time by 8 seconds per unit and saves $0.04 on thread. You can accept that tradeoff consciously, or you can insist on the original spec. Either way, the conversation is about engineering, not about whether the factory is trying to cheat you. Without the spec, you have no basis for that conversation, and you accept whatever they deliver. ## Technical Drawings That Communicate Your flat sketch is not art, it is instruction. Use a single line weight for the garment outline and a thinner line for internal construction. Shade the back panel differently from the front, and label every seam with a letter that corresponds to the construction sheet. If you have a dart, show the dart intake in millimeters, not as a vague wedge. Factories in Vietnam and Cambodia work from these drawings on tablets at the cutting table, so legibility at 50% zoom on a 10-inch screen matters more than aesthetic finish. A drawing that looks beautiful in your portfolio but is unclear at the cutting table costs you a sample round. ## Measurement Charts and Tolerance Logic Tolerances are not guesses, they are manufacturing realities. A 2 cm tolerance on a body length measurement is standard for woven tops because fabric shrinkage varies between dye lots. A 0.5 cm tolerance on a neckline opening is tight but achievable with a binder. If you set a tolerance too tight, the factory rejects the spec or charges a premium for inspection. If you set it too loose, your size grading falls apart at the retail level. Set tolerances based on the construction method, not on a single standard across all measurements. A hemmed edge needs a different tolerance than a bound edge, and a knit needs a different tolerance than a woven. ## BOM Depth and Supplier Codes A BOM that lists "button, 15mm, black" is a starting point. A BOM that lists "button, 15mm, 4-hole, polyester, matte finish, supplied by [vendor code], ref [item number], cost $0.012, lead time 7 days" is a working document. The first forces the factory to source the button, adding lead time and a markup. The second lets the factory order directly from your approved supplier, or match it exactly from their own source. Every line item in your BOM should carry enough detail that two different factories could source the same component and you would not be able to tell the difference in the finished garment. ## Print and Embroidery Specs For prints, specify the repeat size in centimeters, the number of colors, the registration tolerance, and the print method (rotary, digital, or heat transfer). For embroidery, specify the stitch count, the thread type and color, the backing type, and the placement coordinates from a reference point on the garment. A factory that receives a print file without a repeat spec will guess the repeat, and the guess will be wrong for your design. A factory that receives an embroidery file without a stitch count cannot quote accurately because stitch count drives machine time and thread cost. ## Label, Tag, and Packaging Specs These are the last items on the tech pack and the first to be forgotten. Specify the care label content, the fiber content, the country of origin, and the RN number. Specify the hangtag size, material, attachment method (safety pin, string, plastic loop), and placement on the garment. Specify the polybag material (LDPE, biodegradable), thickness, and closure method. Specify the carton size, weight limit, and marking. A missing care label spec means the factory uses their standard, which may not meet your retail partner’s requirements. A missing carton spec means your shipment arrives in whatever boxes the factory had on hand, which may not fit your warehouse racking. ## Tech Pack Format and Delivery Send the tech pack as a single PDF with all pages numbered and a cover page that lists the style number, description, season, and revision date. Send the native files (Illustrator, Excel) in a separate zipped folder. Do not send a link to a cloud folder that requires login; factories in China often cannot access Google Drive or Dropbox without a VPN, and the VPN may not work on their factory network. Send the files directly by email or through a platform that does not require a login. A factory that cannot open your tech pack cannot quote your style. ## Revision Control and Sample Tracking Every revision of the tech pack should carry a new date and a brief changelog. "Updated BOM button spec, changed from 4-hole to 2-hole per client request 2024-03-15." This lets the factory track what changed and when, and it lets you track who requested the change. Without revision control, you and the factory may be working from different versions of the tech pack, and the sample you receive will not match the spec you think you sent. This is the most common cause of sample rejection in the first round. ## The Cost of a Complete Tech Pack A complete tech pack, done by a professional tech pack designer, costs between $300 and $800 per style depending on complexity. A sample round costs between $150 and $400 per style, plus fabric and trim costs. If a complete tech pack saves you one sample round, it pays for itself. If it saves you two sample rounds, it pays for itself twice. The math is simple, and the decision is obvious. Spend the money on the spec before you spend it on the sample. ## Final Check Before You Send Before you send the tech pack to the factory, print it out and read it as if you were the sample room manager. Can you cut the pattern from this document? Can you source the trims? Can you sew the garment without asking a single question? If the answer to any of these is no, the tech pack is not ready. Fix the gap, then send. The factory will still have questions, but they will be questions about preference, not about missing information. That is the difference between a sample round that takes two weeks and one that takes six. ## How Tech Packs Affect Lead Time A factory that receives a complete tech pack can quote in 24 hours, pattern in 5 days, and deliver a first proto in 15 days. A factory that receives an incomplete tech pack quotes in 48 hours with assumptions, patterns in 7 days with guesses, and delivers a first proto in 21 days that does not match your vision. You then spend a week resolving the discrepancies, and the second proto takes another 15 days. Your 30-day sample cycle becomes a 50-day sample cycle, and your production start date slips by three weeks. The tech pack is the first link in the chain, and a weak link there breaks the whole timeline. ## The Factory’s Perspective Factories in China, Vietnam, and Cambodia work with dozens of brands, each with their own tech pack format. They do not have time to decode your unique system. They look for the same information in the same place on every tech pack, and when they do not find it, they guess. A tech pack that follows industry conventions, even if it is not beautiful, gets read correctly. A tech pack that is unique to your brand, even if it is beautiful, gets misread. Conformity to convention is not a limitation on your creativity, it is a courtesy to the people who will build your garment. ## What to Do When the Factory Asks for More Information When the factory asks for clarification, respond with a revised tech pack page, not an email. "Per your question, the hem allowance is 2.5 cm, see revised page 4 attached." This keeps the spec in the document, not in an email thread that gets lost. Every question from the factory is a gap in your tech pack, and every gap should be closed in the document, not in a side conversation. By the time you reach production, the tech pack should contain every decision made during development, and the factory should never need to refer back to an email. ## The Tech Pack as a Living Document A tech pack is not done when you send it. It evolves through the sample process, and the final version should reflect every decision made. When you approve the final sample, the tech pack should be updated to match, and that version becomes the production spec. If the factory produces against an earlier version, you have grounds for rejection. If you produce against the final version, you have no grounds for complaint. The tech pack is the contract between you and the factory, and it should be treated with the same seriousness as any legal document. ## Summary The tech pack is the most important document in apparel production, and it is the most under-resourced. Brands spend months on design and minutes on spec, then wonder why samples take forever and production is late. Invest in the spec, invest in the format, and invest in the revision control. The return is measured in sample rounds saved, lead times reduced, and production quality improved. The factory can only build what you specify, so specify everything.
Tech Pack Templates and Software Tools
While creating a tech pack from scratch is possible, many designers opt for templates or specialized software to streamline the process and ensure consistency across their product lines. Several industry-standard tools and templates can help you organize your specifications more effectively.
Popular Tech Pack Software Solutions
Professional tech pack software can help you maintain consistency across your brand’s product line. Tools like TechPacker, Backbone PLM, and Centric Software offer cloud-based solutions that allow you to create, store, and share tech packs with manufacturers. These platforms often include features like measurement libraries, BOM databases, and revision tracking systems that can significantly reduce errors in communication with your factory.
For smaller brands or independent designers, simpler solutions like Excel templates or Google Sheets can work just as well. The key is consistency in format and completeness of information, regardless of which tool you choose.
Template Structure and Organization
A well-organized tech pack template should follow a logical flow that mirrors the production process. Start with a cover page that includes style number, description, season, designer name, and date. Follow this with your flat sketches, then construction details, BOM, measurement charts, and finally packaging and labeling specifications.
Each page should have a header with the style number and page number for easy reference. Include a revision history table on the cover page that tracks all changes made throughout the development process.
Common Tech Pack Mistakes to Avoid
Even experienced designers make mistakes when creating tech packs. Being aware of these common pitfalls can save you time, money, and frustration during the sampling and production process.
Insufficient Detail in Construction Notes
One of the most frequent mistakes is assuming the factory will understand construction details that seem obvious to you. Remember that your factory may be producing hundreds of different styles for various brands, each with their own construction standards. What seems obvious to you may not be standard practice in their facility.
Always specify stitch types (e.g., single needle lockstitch, double needle chainstitch), stitch density (stitches per inch or per centimeter), and seam finishes (e.g., overlock, flat felled, French seam). When in doubt, include a reference image or diagram showing exactly what you expect.
Vague Fabric Specifications
Listing "cotton fabric" or "polyester blend" in your BOM is not sufficient for accurate production. Specify the fabric weight (GSM or oz/yd²), weave structure (e.g., plain weave, twill, satin), yarn count, and any special finishes or treatments. If you have a specific fabric in mind, include the supplier name and reference number.
For knit fabrics, include details like gauge, stitch density, and stretch percentage in both length and width directions. These specifications
What to send us
If the specifications above match what you are sourcing, send your tech pack to Orange Sea Clothing. If the pack is not written yet, sketches and a reference sample are enough to start — sample development covers the design review, fabric and trim sourcing, pattern making and the first prototype, so you see fit and construction before you commit to a production run.
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