Nothing wastes time and money like a sample that comes back nothing like your design. The difference between a one-try approval and three rounds of revisions is usually a document: the jewelry tech pack. For brands working with wholesale manufacturers, a precise spec sheet is the single most effective tool you have.
What Is a Jewelry Tech Pack?
A tech pack (or spec sheet) is the complete written and visual description of a design that you hand to a factory before production. It removes ambiguity: instead of the factory guessing your metal, stone sizes and finish, every detail is specified. It is the bridge between your CAD/render and the physical piece. Our guide to reading quotations works hand in hand with the tech pack — both rely on precise specs.
What Every Tech Pack Must Include
Drawings and views
Front, side, back and 3/4 views with overall dimensions in millimeters. A render or CAD file helps, but flat technical drawings with measurements are what the bench uses.
Materials
Exact metal (e.g. "925 sterling silver, rhodium plated 0.5µm"), gemstones with shape, size, quality and origin, and any coatings or finishes.
Construction details
Setting type (prong, bezel, pavé), bail size, chain type and length, clasp type, and hallmark positions.
Finish and tolerances
Polish level (mirror vs brushed), and acceptable size tolerances so the factory does not over-engineer to impossible precision.
Why Precision Protects Your Margin
Vague specs ("a nice silver necklace") invite the factory to choose the cheapest option that fits. Specific specs let you compare apples-to-apples quotes across factories — essential when you negotiate price (see price negotiation). A good tech pack also speeds the sample approval process, because there is less to debate.
Common Mistakes to Avoid
- Missing dimensions: "small" and "medium" mean different things to each factory — give numbers.
- Unspecified plating thickness: a thin plate wears in weeks; specify microns.
- No tolerance stated: causes over-engineering or complaints about "inaccuracy."
- No reference photos: send clear images of the style you want to match.
The Bottom Line
A jewelry tech pack is how you turn a sketch into a repeatable product. Specify dimensions, materials, settings and finish in writing, and your samples will match your design far faster. It is the cheapest quality-control tool in wholesale.
Common Tech Pack Mistakes That Cost Money
A tech pack only works if it is complete. The most expensive mistake is leaving something unspecified, which lets the factory choose the cheapest option that fits. Omitting plating thickness leads to thin plating that wears in weeks. Omitting tolerances leads to either over-engineered pieces or disputes about "inaccuracy." Omitting reference photos means the bench interprets your design differently each time. Each gap costs you in rework, returns and delayed launch. Build the spec sheet once, thoroughly, and reuse it for reorders so quality stays consistent across batches.
Most overlooked specs
- Plating thickness in microns, not just "gold plated."
- Acceptable size tolerances.
- Hallmark position and required stamps.
- Clasp, bail and chain type details.
- Finish level: mirror polish vs brushed vs matte.
How Tech Packs Improve Reorders
Once a product is approved, a clear tech pack makes reorders fast and consistent. The factory already knows the spec, so you simply send the quantity — no re-debating the design. This is essential for brands that build a line over time, because it protects consistency between production runs. Pair your tech pack with a solid sample sign-off process so the approved sample and the written spec match. The combination turns one good design into a repeatable, profitable product that scales without surprises.