Technical flats
What is a technical flat?
A technical flat (or fashion flat) is a proportional, black-and-white line drawing of a garment shown as if laid flat, front, back, and detail views. Unlike a stylized fashion sketch, a flat communicates construction and proportion clearly enough for a factory to work from.
What a technical flat shows
A good technical flat is precise and unstyled. It typically shows:
- Accurate silhouette and proportion, drawn to scale.
- Seam lines, darts, pleats, and topstitching.
- Closures, zippers, buttons, snaps, and pocket placement.
- Front and back views, plus zoomed detail callouts where needed.
Technical flat vs fashion sketch
A fashion sketch expresses mood, drape, and styling, it's a creative illustration. A technical flat strips that away to communicate exactly how a garment is constructed. Factories need flats, not sketches: proportion and construction detail matter more than artistic expression.
Generating technical flats with SpecForm OS
SpecForm OS generates clean technical flats, and photorealistic 3-view renders, directly from a garment photo or sketch, including an editable SVG. You can produce a single flat as a Quick Action or fold it into a full tech pack with measurements, BOM, and construction callouts.
Line weight and detail: what makes a flat readable
A technical flat is not just an outline. The good ones use line weight to carry meaning: a heavier line for the garment edge and major seams, a lighter line for internal seams and darts, and a broken or dashed line for topstitching. A factory reads those conventions at a glance, the same way it reads a stitch symbol, so a flat that respects them communicates far more than a single-weight tracing.
Detail views do the rest of the work. Anything the factory has to build precisely, a cuff placket, a zip garage, a pocket bartack, earns a zoomed callout beside the main flat rather than a note in prose:
- Heavy line: outer silhouette and principal seams.
- Medium line: internal seams, yokes, and panel lines.
- Fine or dashed line: topstitch rows and edge stitching, with the stitch margin noted.
- Callout views: closures, plackets, and any construction that is ambiguous at full-garment scale.
- Front and back always; side or interior views when the construction needs them.
When you need a flat versus a render
Flats and renders answer different questions, and a strong tech pack usually carries both. A technical flat is a construction drawing: it shows seams, stitches, and proportion in clean line so a factory can build from it. A photorealistic render shows how the finished garment reads in fabric, drape, and colour, which is what a buyer or a marketing team responds to.
Use the flat as the working document for the factory and the render as the communication tool for everyone who is deciding whether the garment is right. SpecForm OS produces both from the same reference, a clean technical flat including an editable SVG, plus photorealistic front, back, and side renders, so you are not choosing between construction clarity and a convincing preview.
FAQ
Common questions
What is a technical flat in fashion?
A technical flat is a proportional, black-and-white line drawing of a garment used in tech packs. It shows silhouette, seams, closures, and construction details clearly enough for a factory to manufacture from, without the styling of a fashion sketch.
What is the difference between a flat and a fashion sketch?
A fashion sketch is a creative, stylized illustration; a technical flat is an accurate, to-scale construction drawing. Factories work from flats because they communicate proportion and construction detail, not mood.
How do I make a technical flat from a photo?
SpecForm OS generates technical flats (including editable SVGs) from a garment photo or sketch automatically, so you don't have to draw each one by hand in Illustrator.
Are technical flats always black and white?
Almost always, yes. A flat is a construction drawing, so it stays unstyled line art in black and white to keep seams, stitches, and proportion legible. Colour and print are usually shown separately as colourways or on a render, so they do not compete with the construction detail the factory needs to read from the flat.
Do I need both a front and a back flat?
Yes. Front and back are the minimum, because construction on the back, a yoke, a centre-back seam, a back neck facing, is invisible from the front and still has to be built. Add side or interior detail views whenever the construction cannot be understood from front and back alone.
Can I make a technical flat without drawing skills?
You can. Drawing a clean, proportional flat in Illustrator or CAD takes real technical-drawing skill, which is one reason small brands stall here. SpecForm OS generates technical flats, including an editable SVG, directly from a garment photo or sketch, so you review and correct a draft rather than draw each line by hand.
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