Bioprinting without compromises
The bioprinting materials you actually need.
GelMA, SilMA, and custom bioinks for DLP, extrusion, and FRESH bioprinting. Reproducible performance, full analytical transparency, and affordable pricing.
100+
Bioink formulations
10
Base materials
>90%
Cell viability
1d
Custom bioink lead time
New customers
Try a free sample before you buy
First-time customers can request a complimentary 5 g sample of any GelMA formulation to evaluate before committing to a full order.
Request sample
Limited-time
Get a free DLP bioprinter kit with your order
Order 200 ml or more of any bioink and get a complete bioprinting setup — Anycubic Mono 4 Ultra, custom stage and vat, plus 200 ml of DLP training bioink.
Place order
Trusted by
MIT
LLNL
Florida Tech
GNQ Insilico
University of Houston
Politecnico di Milano
NIST
Emory University
Johns Hopkins
Tel Aviv University
Advanced Solutions
University of Illinois Chicago
ARMI
Purdue University
Wake Forest
USAMRICD
George Mason University
Texas A&M
Ibidi
Auxilium Biotechnologies
MIT
LLNL
Florida Tech
GNQ Insilico
University of Houston
Politecnico di Milano
NIST
Emory University
Johns Hopkins
Tel Aviv University
Advanced Solutions
University of Illinois Chicago
ARMI
Purdue University
Wake Forest
USAMRICD
George Mason University
Texas A&M
Ibidi
Auxilium Biotechnologies
What labs order most
A printer-ready bioink for fastest time-to-print, plus the two GelMA bloom strengths researchers reach for across soft-tissue and stiff-scaffold applications.
Ready-to-use Bioink — Your formula
100+ basal formulations across source, concentration, and additives. Printer-ready, sterile, shipped cold.
$2,000
200 ml
View details
Bovine GelMA — 225 Bloom
The versatile middle-ground for soft tissue scaffolds. Excellent printability with cell-supportive mechanics for most workflows.
$1,400
20 g
View details
Porcine GelMA — 300 Bloom
Our workhorse stiff-scaffold material. Best for high-fidelity prints and mechanically robust constructs.
$1,400
20 g
View details
Built for the way labs actually work
Most suppliers ship inconsistent batches at premium prices, with little flexibility on formulations and no support once the invoice clears. We test every batch, price affordably, and answer your emails when something prints wrong.
Tested, every batch
Verified for cell viability, rheology, and printability before it ships. When your next batch arrives in a month or a year, the same formulation prints the same way it did the first time.
Affordable, transparent pricing
Complete pricing is published on this page. Every tier, every gram. No quote-required pricing, and our per-gram rates run well below the major suppliers.
Researchers behind the materials
We're bioprinting researchers ourselves. When a print fails or you need a custom blend tweaked, you'll talk to someone who's done it at the bench, usually within a few hours.
Catalog · 2026
Biomaterials & bioinks, engineered for life.
Every bioink is tested for cell viability, rheology, and printability. Every formulation is validated for DLP, extrusion, and FRESH workflows.
Cell-supportive chemistry
Lyophilized under cryo-pure conditions. Methacryloyl fidelity preserved for photocrosslinking and cell-bearing workflows.
Validated for reproducibility
Every batch ships with a Certificate of Analysis covering ¹H NMR, endotoxin, photorheology, swelling, and storage modulus.
New customer? Try a free 5 g sample first.
First-time buyers can request a complimentary 5 g GelMA sample of their chosen formulation before committing to a full order.
Get a free DLP bioprinter kit with your order.
Order 200 ml or more of any bioink and get a complete bioprinting setup: Anycubic Mono 4 Ultra, custom stage and vat, plus 200 ml of DLP training bioink.
Custom bioinks
100+ basal formulations for in vitro 3D tissue scaffold fabrication.
100+ formulations
| Product | Grade | Compatibility | 50 ml | Popular200 ml | 500 ml |
|---|---|---|---|---|---|
| Ready-to-use Bioink · Any source & formulation | $550 $110/10 ml |
$2,000 $100/10 ml |
$4,500 $90/10 ml |
Gelatin methacrylate
Cell-supportive gelatin methacrylate for functional tissue mimicry. Multiple sources and bloom strengths.
5 products
| Product | Grade | Compatibility | 5 g | Popular20 g | 50 g |
|---|---|---|---|---|---|
| Porcine GelMA · 300 Bloom | $375 $75/g |
$1,400 $70/g |
$3,200 $64/g |
||
| Porcine GelMA · 175 Bloom | $375 $75/g |
$1,400 $70/g |
$3,200 $64/g |
||
| Bovine GelMA · 225 Bloom | $375 $75/g |
$1,400 $70/g |
$3,200 $64/g |
||
| Fish GelMA · Warm water | $375 $75/g |
$1,400 $70/g |
$3,200 $64/g |
||
| Fish GelMA · Cold water | $375 $75/g |
$1,400 $70/g |
$3,200 $64/g |
Silk fibroin methacrylate
Silk-based materials for advanced tissue engineering and regenerative applications where mechanical strength matters.
1 product
| Product | Compatibility | 5 g | Popular20 g | 50 g |
|---|---|---|---|---|
| SilMA · Silk fibroin methacrylate | $1,300 $260/g |
$4,800 $240/g |
$11,000 $220/g |
Training formulations
Cost-effective formulations for learning and testing bioprinting techniques.
3 products
| Product | Compatibility | 100 ml |
|---|---|---|
| DLP Bioink · 10–20% PEGDA 500 | $330 $33/10 ml |
|
| Extrusion Bioink I · Pluronic | $330 $33/10 ml |
|
| Extrusion Bioink II · Alginate | $330 $33/10 ml |
Photoinitiators
Light-sensitive compounds that crosslink biomaterials and bioinks under specific wavelengths.
2 products
| Product | Compatibility | 2 g | Popular5 g | 10 g |
|---|---|---|---|---|
| LAP · 365/405 nm | $140 $70/g |
$325 $65/g |
$600 $60/g |
|
| Irgacure 2959 · 365 nm | $30 $15/g |
$60 $12/g |
$100 $10/g |
Our science
Built by scientists, for scientists.
We started Cytoink to fix the problems we lived with as bioprinting researchers — inconsistent batches, opaque specs, and slow custom orders. Here's who we are, the chemistry behind our materials, and the specifications we hold every batch to.
From bench frustration to production line
Our founders spent years as bioprinting researchers at top institutions, repeatedly hitting the same wall: suppliers would ship GelMA with unknown degree of functionalization, endotoxin levels that changed batch-to-batch, and no way to verify rheology before you burned through $1,400 of material.
Cytoink was built to be the supplier we wished we had. Transparent specs. Honest pricing tiers for labs that don't need medical-grade material for rheology training. Custom formulations shipped in days, not months.
We're a small team of chemists and engineers who still run the NMR instruments ourselves. Every batch passes our desks before it ships.
What is GelMA?
Gelatin methacryloyl is gelatin modified with methacryloyl groups on its lysine and hydroxylysine residues. When exposed to UV or visible light in the presence of a photoinitiator, those methacrylate groups crosslink into a stable hydrogel network that supports cell adhesion, migration, and proliferation.
Quality specifications
Every batch must meet these acceptance criteria before release. Specs are measured on every lot and reported in the Certificate of Analysis.
| Critical Quality Attribute | Method | Specification |
|---|---|---|
| Degree of functionalization | ¹H NMR | 70–90% |
| Endotoxin | LAL kinetic | < 10 EU / mg |
| Gel point (10% w/v) | Photorheology | ≤ 15 s |
| Storage modulus G′ | Photorheology | 8–20 kPa |
| Swelling ratio (24 h) | Gravimetric | 8–15 |
| Residual moisture | Karl Fischer | < 3% |
| Cytotoxicity (L929) | ISO 10993-5 | ≥ 70% viability |
The short version
2023
Founded
Cytoink incorporated by two former bioprinting researchers in the Bay Area.
2024
First custom orders
Established the under-one-week custom formulation pipeline that defines our workflow today.
2025
Public catalog
Launched the first transparent, publicly-priced bioink catalog in the field — every product, every spec, every batch documented.
2026
100+ labs
Now serving research labs across four continents with custom formulations and full batch CoA.
Certifications & compliance
We follow the same quality-management standards as pharmaceutical excipient suppliers, even though our current products are for research use only.
ISO 13485
Quality management processes aligned with medical device standards
TSE / BSE
All bovine source materials certified free of transmissible encephalopathies
ISO 10993-5
Cytotoxicity validated per medical device biocompatibility standard
USP <87>
Biological reactivity testing protocols for in vitro use
Resources
Protocols, guides, and answers.
Everything you need to get the most out of our materials — from photocrosslinking protocols to storage guidelines to a worked example of how to read a Cytoink Certificate of Analysis.
Start here
Protocol
Reconstituting lyophilized GelMA for DLP printing
Step-by-step procedure for rehydrating lyophilized GelMA at 10% w/v in PBS for optimal 405 nm photocrosslinking.
ProtocolExtrusion printing with GelMA bioinks
Temperature, pressure, and nozzle-gauge combinations for extrusion bioprinting across bloom strengths.
GuideChoosing the right GelMA for your application
A decision tree for matching gelatin source and bloom strength to your tissue model, with worked examples across three common workflows.
GuideReading your Certificate of Analysis
What every line on a Cytoink CoA means, why we report it, and how to use the numbers in your own publications.
ProtocolStorage and shelf life
Handling lyophilized and reconstituted material, freeze-thaw effects, and validated shelf-life data.
GuideCustom formulation request guide
How to specify a custom bioink formulation, including concentration, source, photoinitiator, and additives.
Common questions
How long does a custom formulation take?
Standard custom bioink formulations ship in 5–10 business days from order confirmation. That includes synthesis, dialysis, lyophilization or sterile filtration, full QC, and packaging. Rush turnaround is available on request — contact us before placing the order.
How do I choose the right GelMA for my application?
The two main variables are gelatin source and bloom strength. Porcine 300 Bloom gives the stiffest, most mechanically robust scaffolds — best for cartilage, bone, or load-bearing tissue. Porcine 175 and Bovine 225 are the workhorse middle-ground choices for most soft tissue work. Fish GelMA (warm or cold water) is the choice for non-mammalian models or labs with religious or regulatory constraints, with cold-water fish prints well at lower temperatures.
If you're not sure, our Custom Bioink option lets you specify the exact source, concentration, and additives — or contact us and we'll recommend a starting formulation for your application.
Can you ship internationally?
Yes — we ship cold-chain worldwide via FedEx and DHL priority. International orders include all required export documentation, MSDS, and a digital CoA. Delivery is typically 3–5 business days to EU and UK, 4–7 days to Asia-Pacific.
Do you offer GMP-grade material for clinical applications?
Not at this time. All current products are for research use only. A GMP-manufacturing pipeline is on our roadmap for 2027. If you're planning a clinical translation, contact us directly — we can discuss scale-up planning and introduce you to our GMP partner network.
What if I need a formulation that's not in the catalog?
That's what our Custom Bioink option is for. Give us your source (porcine, bovine, fish, silk), target concentration (5–20% w/v), preferred photoinitiator, and any additives (RGD, HA, alginate blends). We'll confirm the spec, synthesize, and ship in 5–10 business days with full CoA.
What's the shelf life?
Lyophilized GelMA is stable for 24 months at −20°C protected from light. Reconstituted solutions should be used within 4 weeks when stored at 4°C. Ready-to-use bioinks have a 2-month shelf life at 4°C. Full shelf-life validation data is on the Storage & Shelf Life protocol sheet.
Get in touch
Let's talk about your research.
Print parameters optimization for your setup? Volume pricing? Custom formulations? We respond within one business day — usually much sooner.
Orders & quotes
For custom formulations, volume pricing, and purchase orders.
Technical support
Protocols, troubleshooting, CoA questions. Our scientists answer directly.
Response time
< 1 business day
Inquiries answered in under 2 hours during ET working hours.
Extra · 07
Beyond the catalog.
Services we provide alongside our materials, plus carefully selected hardware and consumables from partners we trust. Everything here complements the bioinks and biomaterials in our catalog.
Beyond off-the-shelf
Bespoke services for labs that need more than catalog products. From contract synthesis to in-person training, we work directly with your team.
4 services
Synthesis
Contract custom synthesis
Need a non-standard methacrylated polymer? We synthesize PEGylated GelMA, alginate-MA, hyaluronic acid-MA, and other custom photocrosslinkable matrices on demand.
TrainingBioprinting workshops
One- or two-day hands-on training for your team. Covers DLP and extrusion fundamentals, material handling, photocrosslinking, and printer calibration. On-site or at our facility.
ConsultingMethod development
Co-develop printing protocols for your specific tissue model. Includes formulation optimization, rheology characterization, and validated print parameters delivered as a written SOP.
QCThird-party material QC
Send us a sample of bioink from any vendor — we'll run ¹H NMR, photorheology, swelling, and endotoxin testing and return a full Certificate of Analysis within five business days.
Hardware we trust
Bioprinters, photoinitiators, and accessories from manufacturers we've validated with our own bioinks. We sell them at competitive prices and ship them with our materials.
3 products
| Product | Partner | Compatibility | Price |
|---|---|---|---|
| Anycubic Mono 4 Ultra · DLP bioprinter | Anycubic | $429 incl. Cytoink vat |
|
| CELLINK INKREDIBLE+ · Extrusion bioprinter | CELLINK | $14,800 resold w/ kit |
|
| Cytoink Modified Vat Kit · FEP + stage | Cytoink | $185 retrofit kit |
Privacy
Privacy policy.
A short, plain-English explanation of what data we collect, what we do with it, and what we don't do.
What we collect
We only collect information you actively send us. That means:
- Contact form submissions. When you fill out the form on our Contact page, you provide your name, email address, institution, role, and a message describing your needs. This information is sent directly to info@cytoink.com via your own email client.
- Direct emails. If you email us at any of our published addresses, we receive whatever information you choose to share.
What we don't do
This site does not use tracking cookies, advertising pixels, fingerprinting, or third-party analytics. We do not collect:
- Your IP address (we don't run our own server-side logs)
- Your browsing behavior, click history, or time on page
- Any data through cookies or local storage beyond what's needed for the site to function
- Any information from social media, advertising networks, or data brokers
We do not share, sell, or trade your information with third parties for any purpose.
Cart contents
When you add items to your order on the Products page, that information lives only in your browser's memory for the current session. It is not stored, transmitted, or saved anywhere until you choose to send it to us by submitting the contact form.
How we use your information
We use the contact information you provide solely to respond to your inquiry — to send you a quote, answer technical questions, or follow up on a custom formulation request. We may keep a record of our correspondence for our own reference and to fulfill any orders that result from it.
How long we keep it
We retain customer correspondence and order records for as long as they remain commercially relevant — typically the duration of any active business relationship, plus a reasonable archive period for tax, regulatory, and quality assurance purposes.
Your rights
You can request that we delete any personal information we hold about you at any time. Email info@cytoink.com with your request, and we will confirm completion within a reasonable timeframe.
If you are located in the European Union, the United Kingdom, or California, you have additional rights under GDPR, UK GDPR, and CCPA respectively, including the right to access, correct, or port your data. We will honor any such request.
Third-party services
Our website is hosted by a third-party provider that may collect basic technical information (such as request logs) for security and uptime purposes. This information is not accessible to us in identifiable form. Our website fonts are served by Google Fonts, which loads font files but does not set tracking cookies on visitors of this site.
Changes to this policy
If we make material changes to how we handle your information, we will update this page and revise the "Last updated" date above.
Contact
Questions about this policy or your data: info@cytoink.com
Terms
Terms of sale.
The commercial terms that apply to orders placed with Cytoink. By submitting an order, you agree to these terms.
Research use only
All Cytoink products are sold strictly for research and laboratory use only. They are not intended, manufactured, or approved for diagnostic, therapeutic, clinical, veterinary, or human use of any kind. Customers are responsible for ensuring that their intended application complies with all applicable laws, regulations, and institutional policies.
Quotes and pricing
Prices listed on our website are reference list prices in U.S. dollars (USD) and are subject to change without notice. Formal quotes are valid for 30 days from issue. Final pricing on any order is set by the quote we issue in response to your inquiry, which may include volume discounts, custom formulation surcharges, or shipping costs that differ from the website's reference prices.
Orders and acceptance
Submission of an order, whether by purchase order, signed quote, or written confirmation by email, constitutes an offer to purchase. Cytoink reserves the right to accept or decline any order at our discretion. An order is considered accepted once we send a written order acknowledgement.
Custom formulations
Custom-formulated bioinks are made to order based on the specifications you provide. Once production has commenced, custom orders are non-cancellable and non-refundable except as set out in our quality guarantee below.
Payment terms
Standard payment terms are Net-30 from invoice date for established institutional customers and verified academic accounts. We accept ACH, wire transfer, and major credit cards. International customers may be required to pay in advance.
Late payments may incur interest of 1.5% per month or the maximum rate permitted by law, whichever is lower.
Shipping and delivery
Orders ship from our facility in Georgia, USA. Lyophilized materials ship at ambient temperature; reconstituted bioinks and ready-to-use formulations ship cold-chain on dry ice or gel packs as required by product specification. Shipping costs and any required permits are the responsibility of the customer unless otherwise specified in the quote.
Delivery times are estimates. We are not liable for shipping delays caused by carriers, customs, weather, or other circumstances outside our control. Risk of loss passes to the customer upon delivery to the carrier (FOB Origin).
International orders
International customers are responsible for any import duties, taxes, customs fees, and compliance with local import regulations. Some products may be subject to U.S. export controls; Cytoink reserves the right to decline orders to restricted destinations or end users.
Inspection and acceptance
Customers should inspect shipments upon receipt. Any visible damage, missing items, or temperature excursion (where applicable) must be reported to us in writing within 5 business days of receipt. Claims received after this period may not be honored.
Quality guarantee
We stand behind our materials. Every batch ships with a Certificate of Analysis. If a product fails to meet the specifications listed on its CoA — or if you receive a damaged or compromised shipment that you reported within the inspection window — we will, at our discretion, replace the material at no charge or issue a refund of the affected portion of the order.
This guarantee does not cover material that has been mishandled, stored outside the recommended conditions documented in our product information sheet, or used past its labeled expiration date.
Returns
Because of the cell-supportive and biological nature of our materials, we do not accept returns of opened, partially used, temperature-compromised, or custom-formulated products. Unopened catalog products may be returned in original packaging within 14 days of receipt for a refund less a 25% restocking fee, subject to inspection and approval. Customer is responsible for return shipping costs.
Limitation of liability
To the fullest extent permitted by applicable law, Cytoink's total liability arising from or in connection with any product or order is limited to the purchase price paid for the affected product. We are not liable for indirect, incidental, consequential, or special damages, including but not limited to lost research time, lost data, lost grants, or lost commercial opportunity.
Materials are provided "as is" without warranty of fitness for any particular purpose beyond the specifications stated on the Certificate of Analysis.
Intellectual property
Purchase of a Cytoink product grants the customer the right to use that material in their own research. It does not transfer any patents, trademarks, or proprietary methods relating to the manufacture of our materials. Reverse-engineering, repackaging for resale, or use in commercial manufacturing without a separate written agreement is prohibited.
Force majeure
Cytoink is not liable for delays or failures in performance caused by events outside our reasonable control, including natural disasters, supply-chain disruptions, government action, labor disputes, or public health emergencies.
Governing law
These terms are governed by the laws of the State of Delaware, USA, without regard to conflict-of-laws principles. Any dispute arising under these terms will be resolved in the state or federal courts located in Delaware.
Changes to these terms
We may update these terms from time to time. The version posted at the time you submit an order is the version that applies to that order. We will revise the "Last updated" date above whenever material changes are made.
Contact
Questions about these terms, an order, or a quote: info@cytoink.com