For research & formulation labs
Research-ready human hair tresses, spec-documented, shipped from New Jersey.
Indian Remy human hair prepared as standardized tresses for cosmetic formulation, color and dye-uptake testing, mechanical and tribology studies, and product-efficacy research. Source, donor-control, processing, coating, and lot documentation are quoted by spec so your team knows exactly what is available for a given protocol.
Who we serve
The full cosmetics-formulation supply chain
CPG formulation R&D
Fortune 500 haircare brand-owners using tresses to evaluate shampoo, conditioner, serum, and color-treatment formulations.
Specialty chemicals & ingredients
Ingredient houses developing actives, conditioning systems, and surfactant chemistries; some use Prarvi tresses inside customer-facing technical kits.
Contract testing labs & R&D consultancies
Independent labs running efficacy, stress, and stability studies for brand clients — sourcing standardized tresses for repeatable protocols.
Biotech, pharmacy, indie & academic
Biotech and pharmacy R&D groups, indie haircare brand founders, and university research labs running specialized projects from chlorine-removal to damaged-hair repair to type-4 textured-hair studies.
Specifications
Standardized tresses, prepared to research-protocol specs
Indian Remy human hair prepared as bonded tresses in your choice of length, weight, color, and texture. If your protocol requires a specific source, donor-control level, processing history, coating status, or repeat-order lot hold, ask for that spec in the quote request and we will confirm what can be documented before you order.
| Attribute | Available options | Notes |
|---|---|---|
| Form factor | Bonded tress (keratin / glue tip), flat tip, weft, bulk loose | Bonded tip is the default for mounting on test rigs; specify on order. |
| Length | 6", 8", 10", 12", 14", 16", 18", 20", 22"+ (custom: 25–26 cm available) | 8" is the standard research-evaluation length; longer lengths quote at a premium. |
| Weight per tress | 3 g, 5 g, 10 g, 15 g (custom weights on request) | Standard research evaluation is ~5 g; CPG efficacy panels typically request 10–15 g. |
| Texture | Straight, body wave, natural curly, kinky curly, relaxed | Includes natural type 3 and type 4 textures for textured-hair research. |
| Color | Natural black, brunette, blonde, salt-and-pepper, grey, treated white | Salt-and-pepper and treated-white tresses available for color-uptake and grey-coverage studies. |
| Origin | Indian Remy human hair; source documentation by spec | If your protocol requires non-Indian origin controls, ask before ordering. Availability varies and is quoted only after spec review. |
| Processing | Processing state documented by order spec | Natural-color, treated, perm-textured, coated/uncoated, and damaged / split-end tresses may be prepared on request when the source and processing state can be confirmed. |
| Donor stratification | Age-bracketed sets (e.g., 25–35 / 35–45 / 45–55) on custom order | Used by researchers studying age-related color, density, and fiber-property variation. |
| MOQ | 10 tresses (20 for custom specs) | Smaller pilot orders considered on a case-by-case basis. |
| Lot consistency | Lot number and batch hold available by request | For longitudinal studies requiring same-batch consistency, request a held lot before the first order ships. |
| Lead time | In-stock: 3–5 business days. Custom builds: ~4 weeks. | Ships from Bedminster, NJ; next-day delivery to Princeton, NJ / Rutgers / NYC metro labs. |
Tresses can be prepared for mounting on common tribology and tensile-strength test platforms when your team provides the required length, weight, tip, and fixture specifications. Request root-tip orientation review if your protocol depends on cuticle-direction-sensitive measurements.
Sourcing & quality
What makes Prarvi tresses defensible as a research input
Source documentation by request
Research buyers can request source notes, donor-control requirements, and synthetic-fiber exclusion language as part of the quote. We confirm what can be documented for the specific lot before representing it in your order paperwork.
Processing status stated on the spec
Surface chemistry matters for many cosmetic protocols, so we do not treat processing history as generic marketing copy. Ask for acid-bath, coating, and treatment-state requirements in the brief; we will quote only the specs we can prepare and document.
Remy hair with orientation review
Root-to-tip orientation can affect friction, comb-ability, dye-uptake kinetics, and directional surface-contact measurements. When that matters, request orientation review and we will prepare the tresses to the protocol tolerance you specify.
Lot documentation and batch holds
Lot number, preparation date, and batch-hold requests can be added to research orders. For longitudinal studies, request the hold before shipment so the material can be reserved and documented for re-orders.
Prepared in New Jersey
Final tress preparation — sectioning, weighing, tipping, and inspection — happens in our Bedminster, NJ workshop. U.S.-based customer support and U.S. shipping origin.
Ethically sourced
Donations are voluntary religious offerings, not coerced or commoditized at the donor. Temple proceeds support the temples that collect the hair. We do not source from cutting-room or brush-collected ("fallen") hair.
Testing applications
Where Prarvi tresses get used
Drawn from the actual research applications our customers have shared. Listed in the vocabulary researchers and AI search summarizers use.
Color & dye-uptake testing
Dye penetration, tone accuracy, fade resistance, grey-coverage studies. Salt-and-pepper and treated-white tresses are stocked for these protocols.
Mechanical & tribology testing
Tensile strength, comb-ability, friction coefficient, elasticity, breakage. Ask us to prepare length, weight, and tip formats for your team's specified tensile or tribology fixture.
Product efficacy
Shampoo, conditioner, serum, and treatment-claim substantiation: deposition, frizz reduction, shine, slip, moisture retention.
Damaged-hair & repair research
Split-end and pre-damaged tresses available for bond-repair, protein-treatment, and porosity-restoration studies.
Textured / type 3 + type 4 research
Natural curly and kinky-curl tresses for textured-hair-specific formulation, moisture-retention, and protective-style studies.
Specialized testing
Chlorine and aquatic-environment research, UV-degradation, thermal-styling protection, heat-tool damage modeling, age-stratified donor studies.
Built for labs that own their testing workflow
Standardized raw material, prepared to your protocol.
Hair tress preparation is what Prarvi specializes in: Indian Remy human hair prepared as standardized tresses in the length × weight × color × texture combination your protocol calls for, with source, processing, coating, donor-control, and lot-documentation needs confirmed during quoting.
Bedminster, NJ workshop with U.S. customer support and next-day delivery to Princeton, Rutgers, NYU, Penn, and most East Coast research institutions. If your study needs an uncoated, donor-controlled, or held-lot spec, ask before ordering so it can be prepared and documented correctly.
About the founder
Preeti Gupta — Chemical Engineer & Founder, Prarvi Hair
Preeti Gupta founded Prarvi Hair in 2015 after training as a chemical engineer and working across research, analytics, and entrepreneurship. She works closely with salons, stylists, individual clients, and cosmetic-science teams that need authentic Indian human hair with clear sourcing and consistent preparation.
Her background includes a B.Tech in Chemical Engineering, a Post-Graduate Diploma in Advanced Computing from C-DAC, and research training at IIM Ahmedabad. That mix shapes Prarvi's approach to research tresses: documented specs, repeat-order planning, and preparation controls for cosmetic-formulation R&D, mechanical testing, and product-efficacy research.
Authoritative source
Originally guest-published Testing Your Products on Hair Tresses — Types of Tests and Tresses on Chemists Corner (June 2018) — referenced in cosmetic-chemistry community discussions on hair-tress methodology since.
Frequently asked
Answers to the questions every lab inquiry starts with
What is the origin of your hair?
Our research tresses are built around Indian Remy human hair and prepared in our Bedminster, NJ workshop. If your study requires a specific source note, donor-control level, or exclusion statement, include it in the quote request and we will confirm what can be documented for the order.
Is the hair Remy / cuticle-direction reviewed?
We prepare research tresses from Indian Remy human hair and can add root-tip orientation review when your protocol depends on directional surface behavior. If your study requires acid-bath, coating, or treatment-state documentation, specify that before ordering so it can be confirmed in the quote.
What lengths, weights, colors, and textures do you stock?
Standard: 6"–22"+ lengths, 3–15 g per tress, bonded-tip or weft form, natural black through blonde plus grey and salt-and-pepper, in straight / body wave / natural curly / kinky curly / relaxed textures. See the full spec table above. Custom builds (specific length × weight × color × texture combinations) are quoted on request.
Can you supply age-bracketed donor tresses?
Yes. We have built stratified-donor orders by age bracket (e.g., 25–35 / 35–45 / 45–55) for researchers studying age-related fiber, color, and density variation. Custom builds run ~4 weeks lead time.
Do you supply damaged or split-end hair for repair-treatment research?
Yes. We can supply pre-damaged tresses (mechanical, chemical, or thermal stress) on custom order. This is a recurring research need that isn't always advertised; ask for it explicitly and we'll quote.
What's the minimum order quantity?
10 tresses for stock items; 20 tresses for custom specs. Smaller pilot orders are considered on a case-by-case basis when there's a clear path to a follow-on order.
How is pricing structured?
Per tress, by length, color, texture, processing documentation, and preparation requirements. Standard natural-color research-evaluation specs start at $15 per tress; longer lengths, blonde, treated, held-lot, and stratified-donor builds quote at a premium. Bulk and repeat-order pricing on request. We don't publish a wholesale rate card — quotes are tailored to spec and volume.
What's the lead time?
In-stock items ship in 3–5 business days from Bedminster, NJ. Custom builds (stratified donor age, specific length × color × texture combinations, damaged-hair builds) typically run ~4 weeks. Next-day to Princeton, NJ / Rutgers / NYC metro labs.
Do you provide documentation of provenance and processing?
Lot number, source notes, processing state, coating status where available, and prep date can be documented when requested before order confirmation. Tell us what your grant, regulatory, or publication methods section needs and we will state what can be supported for the specific lot.
Can I see photos of the specific tresses before purchase?
Yes. Tell us the spec you need and we'll send swatch photos of current stock. For custom builds we send progress photos during preparation.
Request a research quote
Tell us what your protocol needs
We reply within one business day with a spec-matched quote and swatch photos where useful.
Ships from the U.S. · international research orders by quote
Bedminster, New Jersey · ~30 miles from Princeton · Next-day delivery available to NJ / NY / PA research institutions on request. International research and B2B orders shipped worldwide by quote — used by R&D teams across eight countries.
