草莓榴莲向日葵18岁app404

product details
  • Product Name: hand pencil hardness tester

  • Product model: QHQ
  • Product manufacturer: other brands
  • Product documentation:
You added 1 item View shopping cart
Brief introduction:
The hardness of hand-held pencil hardness tester is an important physical property of lens and coating, such as wear resistance, abrasive resistance, friction resistance, impact resistance, film retention and cleaning difficulty. Therefore, film hardness is a necessary index to evaluate the performance of lens and coating.
Details:

Product Name: Hand operated pencil hardness tester
This product is designed and manufactured according to GB / t6739-1996. The resistance of the coated surface to another object with greater hardness acting on it is to measure the resistance of the paint film to deformation. It is indicated by pencil mark. Suitable for film hardness test.
Product information
The specifications are as follows:

1 tester: ensure that the weight of the weight is 1000 + / - 50g, which acts vertically on the intersection point between the pencil lead and the test bench, so that the angle between the pencil and the test bench remains unchanged at 45 degrees. The test bench can be moved and scratches can be made with pencil.

A group of Chinese brand advanced drawing pencils 6h-6b. Pencil preparation; Cut off the wooden pole to expose 3mm lead core, draw a circle on sandpaper, and make the pencil tip flat to make the edge sharp.

3 the test must be carried out at a temperature of 23 ± 2 ° C and a relative humidity of 50 + / - 5%.

title:
Content:
contacts:
contact number:
Email:
corporate name:
Contact address:
 
 
Note: 1 You can use the shortcut keys Alt + s or Ctrl + enter to send messages!
2. If necessary, please leave your contact details!

草莓榴莲向日葵18岁app404_乐享+app_草草久成人免费视频

http://72.ypwrn.cn http://64.ypwrn.cn http://80.ypwrn.cn http://95.ypwrn.cn http://66.ypwrn.cn http://38.ypwrn.cn http://55.ypwrn.cn http://36.ypwrn.cn http://27.ypwrn.cn http://16.ypwrn.cn http://05.ypwrn.cn