What are the design standards of the whiteness meter?
The whiteness meter is a professional instrument dedicated to the determination of the whiteness of samples. It is widely used in flour production and quality testing. The application of this instrument realizes the quantification of flour whiteness and is more helpful to the optimization and improvement of flour quality. When designing the meter, what are the reference standards? Here is a brief introduction. The whiteness meter meets the standard: GB/T 7933-87 Pulp, paper and cardboard diffuse reflectance factor measurement method (d/o method) From this we can see that the whiteness meter has a wide range of applications, not only for the determination of flour whiteness, but also for measuring paper and cardboard, pulp and chemical fiber pulp, cotton and chemical fiber, textiles, plastics, ceramics, and porcelain , Starch, salt, white cement, china clay, talcum powder and other objects. Machinery shell with gearbox shell processing Machine Parts Housing,Aluminum Die Casting Machine Part Housing,Machinery Housing,Machinery Parts Transmission Housing NINGBO ZHENHAI BOLANG METAL PRODUCT FACTORY , https://www.aldiecastings.com
GB/T 7974-87 Paper and paperboard whiteness determination method (d/o method) GB/T 8940.2 Pulp whiteness determination method GB/T 1840 Industrial potato starch determination method GB/T 2913 Plastic whiteness test method GB/T 13025.2 General test method for salt industry, determination of whiteness GB/T 1543-88 Determination of opacity of paper GB/T 10339-89 Determination of light scattering coefficient and light absorption coefficient of paper and pulp GB/T 5950 Method for measuring whiteness of metal mineral products ISO 2470
Paper and paperboard blue light diffuse reflection factor determination method ISO 2471
Paper and paperboard opacity determination method Textile industry standard: determination method of whiteness of chemical fiber pulp, etc.
Machinery for typical gearbox shell body parts, main processing plane and hole system, to ensure that the size of the hole in the process of machining precision and position accuracy, handle the relationship between hole and plane. Should follow the principle of surface before hole, namely first processing box on the datum plane, and then to datum plane positioning processing other plane, then processing hole system. Because of the planar area is large, with its positioning can ensure reliable positioning, clamping and firm, and therefore easy to guarantee machining precision holes. Secondly, cut off the casting surface uneven, create conditions to improve the machining precision of holes, facilitate and adjustment of the knife, is conducive to protect the cutting tool. Processing technology should also follow the principle of separate rough finish machining.