Ceramic tableware purchase precautions
Tableware is an indispensable kitchenware in modern kitchens. The types of tableware on the market are very rich, mainly because the materials used in them are more diversified, and the materials used in the tableware on the market are mainly ceramics, so ceramic tableware still occupies. The mainstream of the entire tableware market, what should consumers pay attention to when buying ceramic tableware? What aspects do you need to consider the purchase of ceramic tableware?
1. Choose the products of regular manufacturers. At present, the products of regular manufacturers can basically meet the requirements stipulated by the state. Don't be tempted to enter the cheap. Inferior ceramic tableware products have more harmful substances, which will cause human body after exudation during use. A major hazard.
2, pay attention to the color of the tableware when buying, touch the surface of the tableware by hand to see if the inner wall is smooth. Don't buy ceramic tableware that is too bright.
3, the purchase of ceramics for microwave ovens, should avoid metal decorative products, such as with gold, silver or gold decorative patterns or products with wire mosaic patterns. When purchasing, you should pay attention to whether the color of the pattern is bright or not bright. The temperature may not meet the requirements when baking, and the lead and cadmium dissolution rate is often high.
4. For products that are not at ease, you can soak them in vinegar for a few hours. If you notice obvious changes in color, you should discard them. Pay special attention to products that can be wiped off by hand. This product often has a high amount of lead and cadmium.
Concerned about surprises
Label: Ceramic tableware purchase precautions
Previous: What are the surface treatment processes for panel furniture? Next: How big is the gap between the tiles?
Meniscus cylinder Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus cylinder Lens is used to increase the focal length of another Cylindrical Lens while maintaining the angular resolution of the optical assembly. This lens shape is best used when one conjugate is relatively far from the cylindrical lens.
Some styles of cylindrical lenses have antireflective coatings to increase the transmission of light through the lens.
Fused silica cylinder lenses are ideal for demanding laser machining and medical applications.
Negative Meniscus cylinder lens
Positive Meniscus cylinder Lens
Specification of our meniscus cylinder lens or Plano-Convex Cylindrical Lens as follow:
*Material: BK7,Ge,UV-grade fuse silica(JGS1,JGS2,JGS3)or other optical materials
*Dimension Tolerance: +0.0 -- -0.1mm
*Center Thickness: +/-0.1mm
*Focal Length Tolerance: +/-1%
*Surface Quality:20/10
*Surface Figure: lambda/2 at 633nm on plano side
*Clear Aperture>90%
*Chamfer: 0.25mm at 45 degree typical
*Coating Optional
Meniscus Cylinder Lens,Optical Glass Meniscus Cylinder Lens,Meniscus Spheric Lens,Meniscus Cylindrical Lens
China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com