How to read a lash spec sheet before you approve a sample
Two factories can quote the same price for trays that behave nothing alike. The difference is almost always in fields a spec sheet lists but a buyer skips.
Why the sheet exists
A lash tray is sold by specification, not by photograph. Fibre diameter changes weight, curl changes how a set photographs, row count changes cost per client, and band thickness changes how a fan sits on the natural lash. None of that shows up in a product image.
This is why an experienced buyer reads the sheet before looking at the sample. The sample confirms the sheet is honest. It cannot tell you what the sheet left out.
Curl codes are not universal
ب, ج, CC and D are the common range, with U, L and M in specialist lines. Each letter suggests an angle: roughly 35 degrees for B, 45 for C, 55 for CC and 65 for D. Those numbers are conventions, not standards.
Ask what angle the factory means by CC, and compare it against a sample you already trust. Two suppliers can both label a curl CC and differ enough that a set built from one looks flatter than the other. Curl is the field buyers most often assume is fixed, and it is the field that varies most.
Diameter decides weight
Fibre diameter typically runs from 0.03 mm for volume work up to 0.25 mm for dramatic classics. Weight does not scale with the number on its own. A 0.07 mm lash is not a little heavier than 0.05 مم; it is roughly twice the cross-sectional area, and therefore close to twice the weight on the natural lash.
That is why a tray listed as 0.07 sometimes behaves like a 0.10 in the studio. Ask whether the diameter is nominal or measured, and ask for the tolerance. Suppliers who measure will quote it to two decimals.
Length range and the mix behind it
A mixed tray from 8 ل 15 mm is standard for salon work. What matters is the ratio inside the tray, not the endpoints. A tray weighted toward 13 ل 15 mm suits dramatic sets and leaves an artist short on 8 ل 10 mm for inner corners.
Ask for the length breakdown per row. Good factories publish it. The ones that answer with “mixed” have not measured their own packing, and the missing lengths turn up as dead stock at the end of the case.
Row count changes cost per client
Salon trays are usually 16 صفوف. Refill and bulk formats go to 20, retail packs drop to 12 أو 14. Price per tray rises with rows, but price per client falls, because a full set uses a fixed number of lashes no matter how the tray is packed.
Compare suppliers on cost per row, not cost per tray. This single change makes quotes from different factories comparable, and it usually exposes one supplier who is expensive only because the tray is bigger.
Fibre and finish
Nearly all professional lashes are PBT synthetic fibre. “Mink” describes a soft, tapered finish, not an animal. Matte and glossy finishes photograph differently and behave differently under a ring light.
Ask whether the fibre is matte, glossy or semi-matte, and whether the taper is hand-shaped or cut. Cut tips feel heavier at the end and read as synthetic at close range, which matters for salons that photograph their work.
Band type and adhesive strip
Classic trays use a strip that the artist peels from. Cluster and strip products live or die on the band: too stiff and the cluster lifts at the corner, too soft and it collapses on the natural lash.
For cluster lines, the sheet should state band width in millimetres and whether the band is clear, black or knot-free. For strip lashes, ask for the adhesive strip type and whether it is latex-free.
Fields buyers forget to ask for
Four lines are usually missing, and each one causes a dispute later: production date and batch code, tolerance on diameter, packing format inside the case, and the label language the factory can print.
Add those four to your sheet and the quoting conversation gets shorter. A supplier who can answer all of them is organised enough to run a repeat order without surprises.
Using the sheet against the sample
When the sample arrives, check three things against the sheet: curl against a trusted reference, diameter by feel and by weight, and row count by counting. Then test one fan on a strip of practice lashes.
If all three match, the sheet is trustworthy for the bulk order. If any of them drifts, the drift will multiply at volume, and it is cheaper to resolve before production than after the case ships.
Questions buyers ask
Is curl code standardised?
No. Ask for the angle in degrees and compare with a sample you already trust.
What diameter should a classic set use?
Most classic work sits between 0.10 and 0.15 مم. Volume work starts around 0.07 and goes down to 0.03.
How many rows in a standard tray?
Sixteen for salon trays, twenty for bulk and refill formats, twelve to fourteen for retail packs.
What is nominal diameter?
The figure the factory targets. Measured diameter can differ, so ask for the tolerance.
Does fibre type change price?
نعم, slightly. Finish and taper matter more than the raw material for how the set looks.
Should the sheet list the length mix?
نعم, per row. A tray described only as mixed cannot be planned around.
What is missing from most sheets?
Production date, batch code, diameter tolerance and inner packing format.
Can I request custom rows?
Usually yes at volume. Confirm whether the row count changes the case weight and freight cost.
How do I compare two quotes?
Convert both to cost per row and cost per client set, then compare lead time and tolerance.
How do I order?
Send us the specs you need and we will return a sheet with tolerances filled in.
Get a sheet with the numbers filled in
Send the curl, diameter and row count you need. We return a spec sheet with measured tolerances, length mix and lead time, plus a sample tray to check against it.
- Measured diameter tolerance
- Length mix per row
- Nominal curl angle
- Production date and batch