Includes all taxes
K+ has undergone a formula upgrade based on K resin, making it an ideal material for producing functional parts or assemblies. K+ and K printed parts have similar physical properties—High stiffness and toughness, extremely high dimensional and detail accuracy. However, K+ has lower water absorption and better scratch resistance compared to K, which makes K+ more widely used, such as for parts operating in high humidity environments or components that require repeated disassembly and assembly. In addition, the K+ printed parts are pure black and will not appear blue purple in sunlight, with a texture and mechanical properties similar to those of injection molded parts.



▌ Attention
K+ resin liquid has a special odor
Excessive post-curing or low temperature will make prints brittle
Do not apply too much force to the prints just after post-curing, it will take several hours for the prints to reach the mechanical properties they should have
▌ The difference between K+and K
K+ resin has some special odors compared to K
The K+ prints are pure black, while the K prints will show a deep blue purple color in sunlight
The water absorption of K+ printed parts is lower than that of K
K+ is scratch resistant, while K is not scratch resistant
▌ Descriptions
Stiff and Tough, High Strength
Printed parts have excellent tensile, bending, and impact strength, and their mechanical properties are comparable to those of tough thermoplastic plastics. They allow drilling, tapping, and other high stress modifications, making it very suitable for producing functional parts and fixtures that will experience long-term static loads, transient stresses, or strains.

High Precision, Sharp Details
The special formulation of the K+ resin makes it less prone to overexposure and enables the printed parts to accurately reproduce the extremely fine details of the 3D data such as grooves, textures, hairs, holes and protrusions. And the parts can achieve precise assembly, making it an ideal material for producing precision parts, assembly components, and mini doll accessories.

Low Water Absorption Printed Parts
Materials with high water absorption will significantly soften, deform, or even crack with increasing environmental humidity, while K+ printed parts have low water absorption and are less affected by humidity changes, making them suitable for high humidity environment and certain underwater operations.

Scratch Resistance
The surface of K+ printed parts is hard, with excellent scratch resistance performance. The surface of the parts will not be easily scratched by hard objects or powdery by friction. If you need to print parts that require repeated assembly or snap fit, this resin is a good choice.

Pure black, with a texture similar to that of injection molded parts
K+ resin is a pure black liquid, and printed parts will not appear blue purple in sunlight like K resin. It has a delicate texture similar to injection molded parts, the appearance is high-end and good-looking. It is an ideal material for producing appearance verification prototypes, artworks, interior decorations, and toy accessories.

▌ Print Settings
Operating Temp: 20~35℃/68~95℉
Layer Height: 0.05mm
Exposure Time: 3.3~5s
Bottom Exposure Time: 50~70s
Lifting Height:
LCD Screen size less than 8.9 inches: 6mm
LCD Screen size ≥8.9 inches: ≥9mm
Rest Time After Retract/Off times /Light-off Delay: ≥2s
"Anti-aliasing"/"Grayscale" remains OFF!
▌ Cleaning and Post-curing
Cleaning time: ≤5mins
Cleaning solvent: 95% Ethanol or IPA
Post-curing light source: 385-405nm UV(40W)
Post-curing time: 10min
▌ Compatible 3D Printer
All series of Anycubic,Elegoo,Nova3d,Peopoly,Phrozen,Epax,Creality,Zortrax, BIQU, QIDI, UNIZ, Flashforge, Voxelab, Longer, Uniformation etc. UV 395-410nm LCD resin 3D printer
Payment Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are committed to providing a safe, secure, and seamless payment experience for our customers.
1. Accepted Payment Methods
We accept the following payment options:
Major Credit & Debit Cards (Visa, MasterCard, American Express)
Secure Online Payment Gateways (such as PayPal, Stripe, or other providers available at checkout)
Any additional payment methods displayed during checkout
All payments must be completed in full at the time of purchase.
2. Secure Transactions
All transactions are processed through encrypted and secure payment systems to protect your personal and financial information. We do not store your full payment details on our servers.
3. Currency
Prices are displayed in the currency indicated on the website. If you are purchasing from another country, your bank may apply currency conversion fees.
4. Order Confirmation
Once your payment has been successfully processed, you will receive an order confirmation email containing your purchase details.
5. Failed or Declined Payments
If your payment is declined, please verify your billing information or contact your bank. Orders will only be processed after successful payment confirmation.
6. Fraud Prevention
BILLIONS BIRDS reserves the right to cancel or refuse any order if fraud or unauthorised activity is suspected.
Delivery Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are dedicated to delivering your orders safely and efficiently.
1. Order Processing
All orders are processed within 1–3 business days after payment confirmation. Orders are not processed or shipped on weekends or public holidays.
2. Shipping Times
Estimated delivery times vary depending on your location:
Domestic Shipping: 3–7 business days
International Shipping: 7–15 business days
Please note that delivery times are estimates and may vary due to customs procedures, carrier delays, weather conditions, or other unforeseen circumstances.
3. Shipping Costs
Shipping fees are calculated at checkout based on your location and selected shipping method. Any customs duties, taxes, or import fees are the customer's responsibility.
4. Tracking Information
Once your order has been shipped, you will receive a confirmation email with tracking details (if available) so you can monitor your package.
5. Delivery Issues
If your order is delayed, lost, or arrives damaged, please contact us within 7 days of the expected delivery date. We will work with the shipping carrier to resolve the issue as quickly as possible.
6. Incorrect Shipping Information
Customers are responsible for providing accurate shipping details at checkout. BILLIONS BIRDS is not responsible for orders shipped to incorrect addresses provided by the customer.
Refund Policy – BILLIONS BIRDS
At BILLIONS BIRDS, customer satisfaction is our top priority. If you are not completely satisfied with your purchase, we’re here to help.
1. Return Eligibility
You may request a return within 14 days of receiving your order. To qualify for a return:
The item must be unused, unworn, and in the same condition as received.
The item must be in its original packaging.
Proof of purchase (order confirmation or receipt) is required.
Certain items may not be eligible for return, including clearance items, gift cards, or personalised/custom products.
2. Non-Refundable Items
The following items are non-refundable:
Final sale or discounted items
Gift cards
Items damaged due to misuse, negligence, or improper care
3. Return Process
To initiate a return, please contact our customer support team with your order number and reason for return. If your return is approved, you will receive instructions for returning the item.
Unless the item is defective or incorrect, customers are responsible for return shipping costs.
4. Refund Processing
Once we receive and inspect your returned item:
We will notify you of the approval or rejection of your refund.
If approved, the refund will be issued to your original payment method within 5–10 business days.
Please note that banks or payment providers may require additional time to process refunds.
5. Damaged or Incorrect Items
If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery and provide clear photos of the product and packaging. We will arrange a replacement or full refund at no additional cost.
6. Late or Missing Refunds
If you have not received your refund:
Check your bank account again.
Contact your credit card company or payment provider.
If the issue persists, don't hesitate to contact our support team for assistance.
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