Product overview

COS Matt Clear(C) is a non-glare, semi-matt finish overcoat clear for treated PET, Polycarbonate materials or printed surface.
It has superior anti-scratch properties and eliminates the need for protective lamination during post-process or transportation of the products.


  • Design printing and protection for membrane switches, automotive meters, and plastic surfaces
  • Automobile, Motorcycle

  • Home Appliance (IoT)

  • Smartphone, Tablet, Smart watch

  • Sensor

  • Game

  • Others

Features, Function

  • Superior scratch resistance due to the balance of hardness and flexibilities.
  • By printing on printed surface or substrate, a non-glare finish is achieved.


  • PET, PC


  • Z-603 SOLVENT 20%(Standard)
  • *If finger drying is slow with the above ratio, use G-002 SOLVENT or G-003 SOLVENT. (Drying speed G-002 SOLVENT > G-003 SOLVENT > Z-603 SOLVENT)

Catalyst, Promoter mixing

  • 96 Catalyst 3%
  • *The ink will turn to gel after the pot life has expired. Be sure to mix only enough to use.

Recommended cleaner

  • Screen Cleaner L2


  • T100 to 225 mesh(Printing coverage would be 30m2/kg)


  • 80℃ 30 min、or 100℃ 15 min or more is recommended
  • *Drying at temperature below 60℃ is not sufficient to perform achieve full performance.

Standard colors

Introduction of
Color Guide

  • COS-100 MATT CLEAR(C)(Full Matt)
    COS-200 MATT CLEAR(C)(70% Matt)
    COS-300 MATT CLEAR(C)(30% Matt)


  • Not suitable for outdoor exposure applications.
  • Adhesion checking before commercialization: Adhesion may vary depending on the substrate, the process, and the printing, be sure to check the adhesion before mass printing.
  • Ink shelf life: 12 months from production date, unopened


  • UN No.: 1210
  • UN Classification: Class 3 Flammable Liquids (Flash point is over 23 Degree C)


  • Use safety gloves and eyeglasses to protect skin and eyes. If the ink comes in contact with skin, wash with soap and plenty of water (or lukewarm water) and consult with a doctor.
  • Containers should be closed tightly after use and stored in a cool and dark place.
  • SDS is available upon request. Please request a copy and read it carefully before handling the products.


Test Items Test conditions Results
Adhesion JIS K 5600-5-6(Cross-cut),1mm interval 6×6、 cellophane tape peeling off 0(No peel off)
Scratch hardness (Pencil) JIS K 5600-5-4(Pencil method),750g weight, Hardness of the pencil which does not make scar 2H
Heat 80℃ 24 hrs., check appearance of ink layer and peel off No defect
Hot Water JIS K 5600-6-2, Soak 24 hrs. in 60℃ warm water, check appearance of ink layer and peel off No defect
Moisture JIS K 5600-7-2(Continuous dew drop) 60℃ 85%RH 500 hrs.、check appearance of ink layer and peel off No defect
Cold 24 hrs. in -40℃、check appearance of ink layer and peel off No defect
Water 24 hrs. in city water, check appearance of ink layer and peel off No defect
Acid 7 hrs. in 5% H2SO4, check appearance of ink layer and peel off No defect
Alkali 3 hrs. in 5% NaOH, check appearance of ink layer and peel off No defect
Alcohol Gakushin scrub tester, cotton soaked ethanol, 500g weight, 3 times back and forth. Check peeling off from the substrate. No defect
Oil Soak 24 hrs. in vegetable oil, check appearance of ink layer No defect
Solvent Cotton soaked methyl ethyl ketone,500g weight, 3 times back and forth, check appearance of ink layer No defect
Detergent Soak 24 hrs. in 10% neutral detergent, check appearance of ink layer. No defect
Artificial Sweat Soak 24 hrs., check appearance of ink layer No defect
Scrub Gakushin scrub tester, with cotton, 500g weight, 1000 times back and forth, check color fade No defect
Abrasion JIS 5600-5-9(Abrasion ring method), 1kg weight,CS17 ring, 20 rounds, check exposure of under layer. No defect
Scratch Scrub with 300g load, check appearance of ink layer No defect
Sand Rubber LION brand #510 sand rubber,50g 200 scrubs, check appearance of substrate Slightly abnormal
Falling-weight test JIS K 5600-5-3 DuPont Impulse Tester, Drop 300g weight from 30cm height No defect
Accelerated weather Weather meter with carbon arc, Black panel temp. 63+/-3℃, raining rate 18min/120min, check color fade and peeling. (500h) No defect

Test Condition

  • Test conditions 【COS200(C) MATT CLEAR】  【Z-603 SOLVENT 20%】 【96 CATALYST 3%】 【T180】 【80℃ 30 min】 【Substrate:Polycarbonate Sheet】
  • bove resistance test results are measured results in our laboratory and they are not guaranteed values.
  • Information contained in this catalog may change without prior notice.


What is screen printing?

Screen printing is a type of stencil printing which uses a technique of duplicating the image from a design made on mesh stencils.

When printing ink goes through the mesh, it transfers the image onto the substrate material. Other than air and water, any substrate materials are printable. Not only flat surfaces, but also curved, specially shaped, and molded products are suitable for screen printing.

What is diffusivity?

We refer to the diffusion of light (Haze: cloudiness). By diffusing light, a frosted glass-like effect can be achieved.