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| Star Coat White Board |
 Cross Section of White Board |
 Top Star coat : |
Star coat layer of high hardness, high visibility, anti-discoloration against a light expose and a high temperature. |
| White Primer : |
Polyester pretreated layer for adhesive and white color. |
| Chromate: |
Chrome coated layer for providing the adhesion and anti-corrosion property between the white primer and the substrate. |
| Substrate : |
Various metal substrates made by EGI ,GI, GA or CR for providing durability and flatness. |
| Service Coat : |
Back layer coated by epoxy or polyester. |
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| Characteristics of Star Coat Production Process |
| Conventional Process (Left, solvent type) |
| Conventional white board is produced by using the hot air which requires temperature over 200℃ for the solvent paint baking, so that noxious volatile-by-products may generate. |
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| Conventional Process (Left, solvent type) |
| Present white board is produced by using special curing process which requires just room temperature for the paint curing, so that noxious volatile-by-products does not generate. This is an environmentally friendly process. |
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| Characteristics of Star Coat |
| Environmentally Friendly Product |
 Use of environmentally friendly non-solvent type paint.
Use of environmentally friendly special curing equipment, which is a solution of clean
future technology |
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| Excellent Endurance |
| Exceptional surface hardness of 4H (Hardness is the most important physical property because high hardness provides an identical characteristic when the number of eraseness increase) |
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| Excellent Appearance |
Excellent visibility: Star coat white color is much more clear and brighter.
Anti-discoloration: Star coat white color remains unchanged even if an exposed light or a high temperature is applied. |
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| Comparison between Star coat and conventional white board |
| WHITE BOARD |
TEST METHOD |
Solvent |
Starcoat |
Evaluation |
| Surface Hardness |
MITS. Pencil KSM ISO15184 |
X~○ |
◎ |
Dongbu 4H~5H, Others 1H~3H |
| Discoloration ① -UV Test |
△ E=0.5↓ ;QUV 48Hrs |
X~△ |
◎ |
Dongbu△E=0.5↓,Others△E= ~3.0 |
| Discoloration
② -High Temp |
△ E=1.5↓ ; 170℃*1hr |
X~△ |
◎ |
Dongbu△E=1.0↓Others△E= ~6.0, |
| Visibility |
Naked eye |
△ ~○ |
◎ |
Under a fluorescent light |
| Writing Test |
Black, Blue, Red Maker Pen |
○ |
○ |
Dispersion clear |
| Erase ness |
Erase under 2 Kg weight |
○ |
○ |
Contamination after erase |
| MEK Rubbing |
Rubbing100회 |
○ |
○ |
No coating Dissolution/peel off |
| CCT/CCE |
Erischen 4mm/Taping test |
△ ~○ |
○ |
Erischen 4mm/Taping |
| Bending |
3T bending/Taping test |
△~○ |
○ |
Bending 3T, No peel off |
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| Color and Size |
| Item |
Range |
Clearance |
| Color |
White, Beige-Yellow, Striped-White |
- |
| Thickness |
0.3~0.5 mm |
- |
| Width |
890 ~1320 mm |
+ 0.3mm (slit) |
| Shear Length |
2100~4730 mm |
+ 0.5mm (shear) |
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| Dongbu Steel Co. ltd. |
Dongbu Financial Center, 891-10 Daechidong, Gangnamgu, Seoul, Korea Tel:02-3450-8114 www.dongbusteel.co.kr
This content is to provide information of dongbu steel product. Since this does not always guarantee for all products, please confirm all information when you order. Please understand that this content may be changed without previous notice. |
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| Semi-Enameled White Board |
| Semi-Enameled White Board is made by coating method with the special paints on GI ,EGI,CR.It has a excellent writing & erasing in various environments through so long time.It is the durable & special White Board. |
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| Paint Composition |
| It is composite with Oligomer, Monomer, Coloring, Annex.The functions are as below. |
| Composition |
Functions |
| Oligomer |
Decide the basic property of the paint. |
| Monomer |
Dilution.
Control the viscosity, Improve the painting & glueing. |
| Coloring |
Coloring for paint (TiO 2 ). |
| Annex |
Improve the outward painting. |
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| Mechanism |
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| Composion |
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| Standard of Property & Testing Result |
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Standard of Property |
Testing Result |
Remarks |
| Gloss |
Over 90% |
90% |
60° Glossness |
| Surface Hardness |
4H |
5H |
Uni Pencil (Mitsu-Bishi) |
| Bending Process |
Over 4T 4 points |
3T 4 points |
High Temperature, Tapping |
| MEK Rubbing |
Over 100 times |
Over 100 times |
Rubbing with Gauze |
| Impact |
Over 3 points |
3 points |
1Kg 50cm |
| CCT / CCE |
100 / 100 |
100 / 100 |
CCE 6mm Erischen |
| Writing |
No-Uniting
No-Spreding |
Good PaintingNo-Discoloration Good |
100 times with black, blue, red, green. |
| Erasing |
No-Pollution
No-Afterimage |
Good PaintingNo-Discoloration Good |
100 times with black, blue, red, green. |
| Anti-Ultraviolet Rays |
△E=0.5↓ |
△E=0.29 |
20w Sterilization light20㎝*24hr |
| Anti-Heat |
△E=0.5↓ |
△E=0.63 |
170℃*1hr |
| Anti-Chemical |
Good PaintingNo-Discoloration |
Good PaintingNo-Discoloration Good |
48hrs after 5%NaOH, 5% HCl Spot |
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Our Products |
Korean (1) |
Korean (2) |
Korean (3) |
Japanese(1) |
Japanese(2) |
Japanese(3) |
| Gloss |
90% |
97% |
95% |
96% |
97% |
97% |
92% |
| Hardness |
5H |
4H |
2H |
2H - |
2H |
1H |
4H |
| Bending Process |
3T
4 points |
3T
2 points |
3T
3 points |
3T
5 points |
3T
4 points |
3T
4 points |
3T
4 points |
| MEK Rubbing |
100 times |
100 times |
100 times |
100 times |
100 times |
100 times |
100 times |
| Impact |
4 points |
4 points |
4 points |
5 points |
4 points |
4 points |
4 points |
| CCE |
100/100 |
90/100 |
100/100 |
100/100 |
90/100 |
100/100 |
90/100 |
| Writing |
○ |
○ |
○ |
○ |
○ |
○ |
○ |
| Erasing |
◎ |
○ |
○ |
◎ |
◎ |
○ |
○ |
| Anti-Ultraviolet Rays |
△E=0.29 |
△E=3.1 |
△E=0.4 |
△E=4.4 |
△E=2.3 |
△E=1.0 |
△E=1.1 |
| Ant-Heat |
△E=0.63 |
△E=0.43 |
△E=0.94 |
△E=8.18 |
△E=0.59 |
△E=1.45 |
△E=2.38 |
| HCI |
Good |
Good |
Good |
Good |
Good |
Good |
Good |
| NaOH |
Good |
Discolora-tion, BL |
Discolora-tion, BL |
Discolora-tion, BL |
Discolora-tion, BL |
Discolora-tion, BL |
Discolora-tion, BL |
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| * BL : Blistering |
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| Merit of Our Products |
1. Good Writing, No-Afterimage, Good Erasing.
2. High Hardness, Good Endurance for Impact, Good Process,Excellent Endurance.
3. Good Anti-Ultraviolet Rays, No-Discoloration.
4. Good Anti-Chemical, Good Endurance in bad environments
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| Major Property (1) |
| Writing & Erasing |
* Good writing & erasing with the various marker pens
(Korean & Japanese marker pens)
* Keep good writing & erasing after testing of 100 times
* Keep same erasing after 48 hrs. |
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| Major Property (2) |
| Surface Hardness |
* The endurance is very important in white board.
* The important factor of endurance is the surface hardness.
* The high surface hardness can keep same writing & erasing always. |
| OurProduct |
Korean Products |
Japanese |
| (1) |
(2) |
(3) |
(1) |
(2) |
(3) |
| 5H |
4H |
2H |
2H - |
2H |
1H |
4H |
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| -. By Uni Pencil (Mitsu-Bishi) |
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| Major Property (3) |
| Impact & Process |
* The high surface hardness is not good for impact & process generally.
* But our products has a good property about impact & process compared withother products |
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* Anti-Impact : Put the ball of 1kg from 50cm height.
* Bending Process : Tape test after 3T bending.
* CCE : Tape test by Erischen Tester after cross cutting & making projection. |
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| Major Property (4) |
| Anti-Ultraviolet Rays |
* The normal white board can have a discoloration by the ultraviolet raysafter long time
(Especially Yellowish).
* Our products has a strong property of Anti-Ultraviolet Rayscompared with other products. |
| OurProduct |
Korean Products |
Japanese |
| (1) |
(2) |
(3) |
(1) |
(2) |
(3) |
| △E=0.29 |
△E=3.1 |
△E=0.4 |
△E=4.4 |
△E=2.3 |
△E=1.0 |
△E=1.1 |
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-. Test the color data after 20w sterilization light 20cm*24hrs
-. Our standard : △E=0.5↓
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| Major Property (5) |
| Anti-Chemical |
* Keep the good surface in Acidity & Alkali (Especially Excellent Anti-Alkali)
* Can use our products in such as chemical factory. |
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| -. 48hrs after 5% HCl, 5% NaOH Spot |
Star Coat White Board 