How to Test Hair Bundles Fairly: Before You Start
The biggest mistake buyers make is testing one sample at a time, weeks apart, in different ways. Then every sample "seems fine". To compare properly:
- 1Order the same spec from each vendor Same texture, length, grade and, for wigs, the same lace and density. Use a spec sheet so nobody guesses.
- 2Label each sample with a code , not the vendor's name, so you judge the hair and not the brand.
- 3Weigh and measure on arrival Note the real weight and the real length (straightened, from the weft to the longest ends).
- 4Keep a small cutting from each as a reference. If you place a bulk order, you'll compare against it.
- 5Use the same products and tools for every sample: one clarifying shampoo, one conditioner, one flat iron at one temperature.
- 6Record everything on the scoring sheet at the end of this article.
Out of the Bag: Weight, Length, Ends and a Burn Test
Before any water touches the hair, check:
- 01Weight a 100 g bundle should weigh close to 100 g. Anything well under the agreed weight is a warning.
- 02Length measure it straight. Wavy and curly hair should be stretched gently.
- 03Ends hold the bundle at the weft and look at the bottom. Fuller ends mean more short hair has been removed. Compare with our guide to single drawn vs double drawn hair.
- 04Weft pull gently along the weft. It should be firm, flat and evenly stitched, with no loose loops.
- 05Smell a strong chemical or sour smell can mean heavy processing or poor washing.
- 06Feel be careful with hair that feels unusually slippery. Silicone coatings make hair feel silky until they wash out.
- 07Burn a few strands cut from the weft end, over a sink. Human hair turns to a fine ash; synthetic fiber shrinks into a hard bead. If a bundle sold as 100% human hair beads, you don't need the other tests. How to read the ash and smell, and what a magnifier shows, is in How to Tell if Hair Is Human Hair.
Don't judge the hair yet: many problems only show up after washing.
Test 1: The Wash Test
Wash each sample twice with a clarifying shampoo, then condition and let it air dry. This removes most of the coatings used to make hair look better in the bag.
| What to check | Good sign | Warning sign |
|---|---|---|
| Shedding in the water | A few strands | Noticeable clumps |
| Tangling while wet | Detangles with fingers | Knots that won't release |
| Color in the water | Clear | Water turns colored (dyed hair sold as natural) |
| Smell after washing | Neutral | Chemical or sour smell remains |
| Pattern after drying (wavy or curly) | Pattern returns | Pattern drops or turns frizzy |
| Shine after drying | Natural, soft shine | Dull and dry, or straw-like |
Test 2: The Comb and Shedding Test
Once the hair is dry, comb it from the ends up to the weft with a wide-tooth comb, then run your fingers along the weft and pull lightly.
- Count how many hairs come out over 20 strokes. A few short strands are normal. More than 10 strands over 20 strokes, clumps, or shedding that continues after the second wash is a fail.
- Check whether the ends mat or form small knots, which can mean mixed cuticle direction.
- Run the hair between your fingers from the ends towards the weft. Remy hair feels slightly rougher going "against the grain". Hair that feels the same both ways may have had its cuticle stripped; the finger test is explained in Cuticle Aligned Hair.
Ask your other vendors for their shedding standard in writing so you have a number to compare with ours.
Test 3: The Heat Test
Flat iron a section at a fixed temperature, for example 180°C (356°F), the same number of passes for each sample. Then let it cool and wash it again.
- Real human hair straightens smoothly and returns close to its texture after washing.
- Synthetic fiber mixed into human hair melts, curls up or gives off a burnt plastic smell.
- Over-processed hair turns dry and loses shine after one heat pass.
Test 4: The Bleach Test (Virgin and Raw Hair)
If you plan to sell blonde or colored units, or your stylists will color the hair, this test matters most. Take a small section, lift it with a standard lightener and developer and check every 10 minutes.
- All dark hair passes through red and orange as it lifts. That stage is normal.
- Good virgin and raw hair keeps moving past orange towards yellow and pale blonde, evenly, and stays strong when wet.
- Hair that stalls at orange however long you leave it, lifts in patches, or turns gummy and snaps when wet has usually been dyed or chemically processed before.
- Note how many levels it lifted and how long it took. That's useful data for your colorist.
What each lift stage looks like, and how far each grade can safely go, is in Can You Bleach Human Hair Bundles?.
Test 5: The Wear Test
The wear test catches what a sink can't: lace that frays at the ear tabs, combs that slip, a crown that flattens by day four. Ask a stylist, team member or trusted client to wear the hair or wig for at least five to seven days, washing it once.
For wigs, also check:
- 01Lace does it lay flat and melt on the skin, and does it tear easily at the edges?
- 02Knots are they bleached evenly, and do hairs pull out at the hairline?
- 03Cap fit does it fit the stated size, and do the combs and band stay secure? See our cap size guide.
- 04Density is it close to the density you ordered, especially at the crown?
What Usually Causes Each Problem
| Problem | Likely cause | Fixable in bulk? |
|---|---|---|
| Heavy shedding at the weft | Weak stitching or poor sealing of the weft | Yes, with a better weft spec |
| Tangling and matting | Mixed cuticle direction or stripped cuticle | No, it's the raw material |
| Pattern drops after washing | Texture set with too little steam processing, or low-grade hair | Sometimes, ask about processing |
| Thin ends | Single drawn hair, or less long hair than agreed | Yes, order double drawn |
| Orange that won't lift | Previously processed or dyed hair | No, choose another vendor or grade |
| Lace tears at the hairline | Very fine lace handled roughly, or poor knotting | Yes, change lace or knotting |
Scoring Sheet
Score each sample from 1 to 5 on each line, then multiply by the weight. Ask us for the full sheet, with space for notes and photos, and we'll send it with your sample order.
| Test | Weight | Sample A | Sample B | Sample C |
|---|---|---|---|---|
| Weight and length vs spec | x2 | |||
| Ends (fullness) | x1 | |||
| Weft quality | x1 | |||
| Wash: shedding and tangling | x3 | |||
| Wash: pattern and shine | x2 | |||
| Comb and shedding count | x3 | |||
| Heat test | x2 | |||
| Bleach test | x2 | |||
| Wear test (5 to 7 days) | x3 | |||
| Total (max 95) |
A sample needs at least 76 of 95 (80%) to go to bulk. A score of 1 on tangling, heat or bleach, or a failed burn test, rules the sample out whatever the total, because those problems come from the raw hair and can't be fixed in production.
After the Test: Turning a Good Sample into a Good Bulk Order
Write down exactly what you approved (grade, origin, real length, weight, density, lace, knotting and color), send it as your spec, and keep your reference cutting for the first delivery. The full chain from approved sample to spec, tolerances, pre-shipment check and claims is in the Before-You-Order Checklist of our buying guide.
When you order samples from us, your approved sample becomes the production reference, and our QC team checks bulk goods against it before shipping. The sample cost is credited to your first bulk order above US$1,000.
FAQ
How long should I test hair samples before buying?
Plan for one to two weeks: a few days for the wash, comb, heat and bleach tests and five to seven days of real wear.
What if two samples score almost the same?
Look at the x3 lines first: shedding, comb count and wear. A sample that wins there beats one that wins on ends or shine. If they still tie, ask both vendors for a second sample cut from current bulk stock, and compare landed cost rather than unit price.
How much shedding is normal for a new bundle?
A few short strands during the first wash and comb are normal. Clumps of hair, or shedding that continues after several washes, usually point to a weft or hair quality problem.
Should I test every color and texture?
Test each texture and each lace type you plan to sell. For colors, test the lightest shade you'll offer, because that's where quality problems show first.
Do you offer sample kits for comparison?
Yes. Our Hair Grade Comparison Kit puts standard virgin, double drawn and raw samples side by side so you can test grades against each other.
Order Your Test Samples
Pick the products you want to compare. We make samples in 5–7 days and send them by express with tracking, usually 3–7 days in transit.
Related reading
![Photo of [Production Author Name]](/images/author-production.jpg)
Runs production and quality control at ZUVI WIGS, from raw hair sorting to final inspection. [Production Author Years] in hair manufacturing.
Reviewed by [QC Manager Name], Quality Control