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Our Chalkboard has excellent durability and is free from discoloration or color fading.
It is provided with extensive color variations and produces a stage for easy learning as well as for better communications.
In addition, we also offer users a product series of a chalkboard to project a picture, named “VIVAE”, to allow users to project pictures, to write on it with a chalk and to erase script instantaneously.
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Excellent durability This product is applied with original nickel processing on the substrate of special steel sheet for enamel coating and with hardened enamel finishing. This makes it possible to demonstrate high wear resistance and no discoloration or color fading under normal use with easy care. |
Economical It is economical based on the long-term running cost as it allows users to use it without additional covering, repainting or replace for a long time. |
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Can also be used with magnets You can use magnets to easily hold charts, memorandums or maps, as the substrate is made of steel. |
Capability to print grid pattern Grid patterns are free from to be faded away as they are applied by enamel baking processing. It is best fitted for writing characters, figures and graphs.*) Not all products have this capability. |
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Excellent projection capability |
Offer with optimal width & length It is manufactured as a coil or cut to length as a sheet according to its specification in our plant. This enables us to offer the product with optimal width and length according to users’ needs. |
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Color variations
Specification and performance
| Item | Chalkboard | ||
|---|---|---|---|
| Coating thickness (enamel layer on top surface) | 110μm | ※1） | |
| Original material thickness (mother material thickness) | 0.30 to 0.48mm | ※1） | |
| Coating thickness (enamel layer on rear surface) | 25μm | ※1） | |
| Color difference to the standard plate (ΔE) | Less than and equal to 1.5 | ※1） | |
| Glossiness (Gs45°) | Less than and equal to 15% | ※1） | |
| 21.0% | ※3） | ||
| Mohs hardness | 5.5 | ※1） | |
| Wear resistance test Tabor abrasion test |
abrasion test (abrasion ring: CS-17/1kg) (1000 revolution) |
27.1mg | ※2） |
| Solvent resistance Toluen, acetone, alcohol, benzene, xylene and oil |
No change | ※2） | |
| Surface roughness Max. height (reference length: 25 mm) |
14.42μm | ※2） | |
※1）This is a typical value, and not a guaranteed value.
※2）This is obtained by our measurement (B-505-CMR).
※3）This is obtained by our measurement (B-524-CMM; “VIVAE”).
Excellent projection capability *) “VIVAE”
It allows users to project pictures by excellent projection screen function and to demonstrate productive school lessons or presentations using the combination of visual images, chalks and magnets.
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Illustration of cross sectional structure
Features
| Easy to write on & easy to read | Flat and fine surface makes writing comfortable, and no thin spot offers users better reading. | Rust proof (corrosion) |
Dual-layer structure (top & under coat layer) of thick enamel coating guarantees no rusting. |
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| Easy to erase | Smooth surface helps users erase writing easy and clean by using a chalk eraser. (Cleaning of the eraser needs to be done often.) |
Acid resistance | Glazed surface with excellent chemical resistance withstands for longer use and demonstrates no deterioration of enamel against various solvents such as toluen, benzene or alcohol. |
| Easy to maintain cleanliness | Panel surface can be always maintained sufficient cleanliness by using a chalk eraser and shows further beauty by wiping out with water contained cloth and dry cloth. (Cleaning of the eraser needs to be done often.) |
Durability | Hard enamel coating layer obtained by vitrification of glaze at high temperature shows excellent resistance to abrasion, shocks and scratches. |
| Surface roughness | Flat and smooth surface is formed by using glaze blending and special glazing technology. |
Chalkboard
VIVAE
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Contact Section：
Sales Department of River Enamel Products
| Address： | JL Nihonbashi-Bldg 1-10-15, Nihonbashi Horidome-chou Chuo-ku, Tokyo 103-0012 |
| Phone： | +81-3-5644-5417 |
| Fax： | +81-3-5644-5404 |
