BITTER FUNCTION
Bitter-taste functionalityWe define the intended function, such as deterring oral contact,
and review the relevant conditions of use.
FUNCTIONAL INK. NEW POSSIBILITIES.
BITTER INK®
A new function. On the surface.
Bitter-taste functionality through printing and coatings.
Discover what your next product could become.
TECHNOLOGY
SMALL LAYER.
NEW POSSIBILITIES.
A thin layer. A new way to think about your product.
BITTER INK is Kunmuk’s technology brand for incorporating bitter-taste ingredients into printing and coatings.
We review your material and use conditions, then work together to develop an appropriate application.
SURFACE & MATERIAL
Material compatibilityWe assess application feasibility and methods
based on substrate and surface characteristics.
PRINT & COATING
Print & coating collaborationOur application experience with offset, UV and gravure
informs discussions about the production process.
TEST & DEVELOP
Sample development & evaluationWe agree on evaluation criteria, such as functional performance,
uniformity and adhesion, and assess the samples.
SURFACE TO POSSIBILITY
One technology. Different possibilities.
From printing and coatings to the products we use every day.
Concept images illustrate potential applications; they are not photographs of finished products.
REGISTERED BRANDBITTER INK: trademark protection
PATENTED TECHNOLOGYKorean Patent No. 10-2761689
REAL APPLICATIONSApplications in books & pet-care products
PROTECTED INTELLECTUAL PROPERTY
Our technology. Our brand.
Protected by intellectual property rights.
BITTER INK’s technology and brand are protected by patent and registered trademark rights.
01 / PATENT PROTECTION
Patent-protected technology
KR 10-2761689
Ink composition comprising a non-toxic bitter-tasting additive, and printed materials comprising the same.
View patent certificate
02 / TRADEMARK PROTECTION
Trademark-protected brand
Bitter INK®
BITTER INK is a registered trademark. The brand name and identity are protected by trademark rights.
KC CERTIFIEDBITTERBOOKS / CHILDREN'S PRODUCT SAFETY
Two picture books for children.
Safety standards verified through KC certification.
The BitterBooks picture books “My Fingers, Kong’s Toes” and “Inom Seonsaengnim” have KC certification. We value not only the stories we create, but also making products that meet the applicable children’s product safety standards.
My Fingers, Kong’s ToesKC-certified picture book
Inom SeonsaengnimKC-certified picture book
OUR VISION
BEYOND THE ORDINARY
A Different
Kind of Ink.
Rethinking familiar surfaces.
From printing that adds color to printing that adds function.
BITTER INK connects the sensation of bitterness with new possibilities for products.
We continue to develop and evaluate applications that can bring this difference into everyday life.
DISCOVER
Discover the opportunity.We look at how products are used
and identify surfaces where a function could help.
CONNECT
Connect technology and products.We consider materials alongside printing and coating processes
to turn an idea into a development project.
REFINE
Refine the application.We use samples to understand opportunities and limitations,
then refine the approach for the product.
APPLICATIONS
FROM INK.
INTO LIFE.
Where technology becomes an everyday product.
Kunmuk applies BITTER INK to products under its own brands,
building experience from development through commercialization.
01 / PET CARE
BitterCare
Bitter-taste functionality for everyday surfaces
BitterCare
An adhesive product developed to help deter unwanted chewing by dogs.
This application uses a bitter-taste coating on transparent PET film.
02 / PUBLISHING
BitterBooks
Printing that connects stories and sensory experiences
BitterBooks
An application of bitter-taste printing to a selected picture-book page.
It connects storytelling with a new sensory experience.
PARTNERSHIP
LET'S MAKE
THE NEXT DIFFERENCE.
We welcome partners who want to explore new product possibilities.
Product application development
Manufacturers · Brand owners
For companies exploring bitter-taste functionality,
we review materials, intended use and the scope of sample development.
Printing & coating collaboration
Printers · Coaters · Material companies
With partners who bring process expertise,
we review material compatibility and production feasibility.
Joint business development
Product concepts · Joint development · Technology-use discussions
Starting with new use cases and product ideas,
we discuss development roles and commercial terms.
HOW WE WORK
From an idea to a defined development project.
- STEP 01
Define the application
Share the product, material and use conditions
- STEP 02
Review feasibility
Discuss process conditions and sample scope
- STEP 03
Sample development & evaluation
Evaluate against agreed criteria
- STEP 04
Discuss commercial terms
Discuss supply, production and partnership terms
Feasibility and performance require a product-specific review. Development costs, timing and minimum quantities depend on the agreed scope.
Safety and applicable requirements must be assessed for the final product’s intended use and destination market.
QUESTIONS
Questions
before we begin.
Which materials can you work with?
We have application experience with paper and PET film in our own products. For other materials, we review surface characteristics, printing or coating methods and conditions of use before assessing feasibility.
Can I purchase the ink directly?
We currently welcome inquiries about product-specific application development and partnerships. The ink or coating approach and availability for supply are discussed individually after reviewing your application requirements.
Can we talk while an idea is still taking shape?
Yes. We can discuss a potential collaboration before detailed specifications are available. Tell us about the product and the problem you want to address so we can define the scope of a review.
Are the technology and brand protected?
Yes. BITTER INK’s technology is protected by Korean Patent No. 10-2761689, and the registered BITTER INK trademark is protected by trademark rights.
CONTACT US
IT STARTS
WITH YOU.
Your product’s next possibility.
Let’s talk about it.
The product you have in mind. The problem you want to solve.
A collaboration can start with a simple idea.
KUNMUK CO., LTD.
BITTER INK® / TECHNOLOGY & PARTNERSHIP
BITTER INK® / TECHNOLOGY & PARTNERSHIP