VAR-NF Ink series is a naphthalene-free type screen ink that does not intentionally use naphthalene as a raw material. It has superior adhesiveness to plastic such as Acrylic plates and Rigid PVC, etc. and solvent resistance, and is suitable for screen printing on instrument panels for automobiles and home appliances and various display boards.
- Outdoor signage, instrument panels for automobile and home appliances, and various display boards.
- Naphthalene is not intentionally used as a raw material.
- By using NF solvent, a naphthalene-reduced diluting solvent, in combination, excellent adhesion can be obtained to the following materials.
- It has particularly excellent surface hardness and is not easily scratched.
- Excellent alcohol resistance and solvent resistance to common thinners.
- Acrylic, Soft & Rigid PVC, ABS, Polycarbonate
- NF-001 SOLVENT（fast） NF-002 SOLVENT（standard） NF-003 SOLVENT（slow） NF-004 SOLVENT（extra slow）
- Dilution 15% to 20%
- *Due to the possibilities of contamination with naphthalene, use designated solvents NF SOLVENT.
- SM-40 DEFOAMER 2%（For anti-foam and improvement in leveling）
- Screen Cleaner L2 or NF-003 SOLVENT
- T 150 to 300 mesh（Coverage is 20 to 28m2/kg at 250 mesh）
- Each layer 60℃ 10 min
Final layer 60℃～80℃ 60 min
003 BRIGHT RED
177 OPAQUE RED
271 OPAQUE LIGHT YELLOW
277 OPAQUE REDDISH YELLOW
675 OPAQUE WHITE
- Adhesion test must be done before printing as quality of plastic may differ depending on manufacturers or lots. It is also recommended to wipe surface of the printing part with alcohol or mineral spirits to prevent defective print due to static electricity and insufficient adhesion due to plasticizer and additive floating.
- The can tends to rust due to moisture. Please use as soon as possible after opening.
- Since naphthalene is present in all petroleum products, its complete removal is difficult. The amount of naphthalene in this product is not a guaranteed value.
- Please handle squeegees and cleaning solvents with care.
- Checking before production: Adhesion and resistance properties may change due to differences in substrates, processes, printing and drying conditions. Be sure to check the adhesiveness and resistance properties before mass production printing.
- Ink shelf life: 24 months from production date, unopened.
- UN No.: 1210
- UN Classification: Class 3 Flammable Liquids（Flash point is below 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 item||Test Conditions||Test results|
|Adhesion||JIS K 5600-5-6:ISO2409（cross-cut）,1mm interval, cellophane tape and peel off||0（no peel）|
|Pencil Hardness||JIS K 5600-5-4:ISO 15184（pencil）,Weight 750g, Hardness which does not make scar||3H|
|Heat||JISK5600-6-3：ISO 3248: 150℃、2hrs., check appearance and peel off from the substrate.||No defect|
|Hot water||JIS K 5600-6-2： ISO 2812-2, Soak 24 hrs. in 60℃ hot water, check appearance and peel off from the substrate.||No defect|
|Acid||Soak 24 hrs. in 5% H2SO4, check appearance||No defect|
|Alkali||Soak 24 hrs. in 5% NaOH, check appearance||No defect|
|Alcohol||Gakushin scrub tester, cotton soaked ethyl alcohol, weight 500g, 300 back and forth, check peel off||No defect|
|Oil||Gakushin scrub tester, cotton soaked engine oil, weight 500g, 300 back and forth, check peel off||No defect|
|Solvent||Gakushin scrub tester. Cotton soaked MIBK, weight 500g, 20 back and forth, check peel off||No defect|
|Gasoline||Gakushin scrub tester. Cotton soaked High octane gasoline, weight 500g, 20 back and forth, check peel off||No defect|
|Scrub||Gakushin scrub tester, cotton, weight 500g, 300 back and forth, check color fade||No defect|
|Vacuum forming||Check cracks after forming by vacuum forming machine.||No defect|
|Accelerated weathering||JIS K 5600-7-7 ISO 11341 Radiant energy 60W/m2、BP Temp.63±3℃ Raining rate 18 min/120 min, check color fade||（800-2000hrs） No defect|
- Test conditions 【VAR- NF675 Opaque White, For formability, 391 Blue, 611 White】 【60℃ 30 min】 【NF-002Solvent 20%】【T 250】【Substrate: SHINKOLITE™ (Acrylic Sheet) E(extrusion)】
- Above test was conducted after leaving above printed materials for 24 hours at a room temperature.
- Above 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.
When over-printed with a black ink, we often have pinholes. How can we eliminate the pinholes?
See the list below for causes of pinholes:
1. The first layer is too thin (less than 5 µ)
2. Too much dilution of the ink (more than 20%)
3. Too much squeegee pressure
4. Under layer is pale colored, such as a medium based color
5. Any combination of these causes
What are the standard drying conditions?
In multi-color printing, primary drying would be done after each color is printed. After the final color is printed, the final drying should be done according to the conditions listed in the catalog. If the color printed ink is a “two-pot” ink the final drying should be done after the printing of the Binder.
Why there is “Primary” drying and “Final” drying?
Residual solvent at the time of injection may cause ink flow and insufficient adhesion. To prevent these malfunctions, residual solvent must be evaporated through a “Final” drying process.
When we extended the primary drying time, pinholes and cracks resulted. How can we eliminate them?
With one-pot inks, if the primary drying time is too long, the solvent of second ink penetrates the first color layer and makes pinholes.
With two-pot inks, if the primary drying time is too long, a curing process occurs. Thus when the second color is printed, the first color ink layer wrinkles and looks like cracks. The countermeasure in either case would be to shorten the primary drying time.