Length deviation high quality ceramic tiles are generally within 0.3mm;
Width deviation high quality ceramic tiles are generally within 0.2mm;
Thickness deviation high quality ceramic tiles are generally within 0.3mm;
Straightness high quality ceramic tiles are generally at 0mm;
High-quality ceramic tiles with chamfering conditions are generally less than 0.3mm on all four sides;
Bending curvature deviation high quality ceramic tiles are generally within 0.4mm;
Diagonal deviation high quality tiles are generally within 0.5;
Water absorption rate high quality ceramic tiles are generally within 15.5% (ceramic brick), within 0.1% (porcelain brick);
Thermal shock resistance (180 degrees) high quality ceramic tiles generally 10 times without cracking;
High-quality glaze-resistant ceramic tiles are generally cracked 8 times or more;
Glossy high quality ceramic tiles are generally above 80 degrees;
High-quality ceramic tile with polished effect, the glaze is bright and standing, crystal clear;
Printed with high quality ceramic tiles, natural texture and rich color and stability.
Chemical properties
1. Chemical resistance: including low concentration acid and alkali resistance, high concentration of acid and alkali, family chemical resistance and swimming pool salt.
2. Dissolution of lead and cadmium: (omitted).
Radioactivity and 3c certification
The national standard gb6566-2001 "Limits of radionuclides for building materials" stipulates the limits and test methods for natural radionuclides in building materials: radium-226, strontium-232, potassium-40, radioactivity specific activity.
Since August 1, 2005, China has begun mandatory radioactivity testing of porcelain tiles with a water absorption rate of ≤0.5%. Tile manufacturers must pass this certification to allow product sales, the so-called 3c mandatory certification. Glazed tiles and square tiles are not covered by the “3c†certification because they have a water absorption rate of more than 0.5%.
The specific radioactive nuclide of radium-226, é’-232, and potassium-40 in the decoration materials meets the requirements of ira ≤ 1.0 (internal irradiation index) and ir ≤ 1.3 (external irradiation index), which is a type of decoration material. Its production, sales and use range is not limited.
CMOS Explosion-Proof Camera refers to the CMOS sensor, each pixel will be adjacent to an amplifier and A / D conversion circuit, the data is output in a similar memory circuit, so the data of the CMOS process will be generated when the transmission distance is long. Noise, therefore, it is necessary to first amplify and integrate the data of each pixel, but since each pixel of the CMOS sensor is composed of four transistors and one photodiode, the photosensitive area of each pixel is much smaller than the surface area of the pixel itself. Therefore, in the case of the same pixel size, the sensitivity of the CMOS sensor is lower than that of the CCD sensor, but the cost of the CMOS is lower due to the process gap.
CMOS Explosion-Proof Camera,Explosion Proof Camera Housing,Flame Proof Camera
Shenzhen Wardmay Technology Co., Limited , http://www.wardmaycctv.com