Ink proofers,contact Angle Tester Factory Manufacturer In China

19 Mar

How to calculate the compressive strength of cartons?

Cartons are required to have a certain compressive strength, because after packing goods in the process of storage and transportation, the cartons stacked in the lower layer are under the pressure of the upper cartons. In order to avoid collapse, they must have appropriate compressive strength. The compressive strength of cartons is calculated by the following formula: P = KW (n – 1) In the formula, P—- carton compressive strength, N W—- Carton weight after loading, N N —- Number of stacking layers K—- [...]

16 Jan

Environmental stress screening (ESS) testing

The objective of the ESS test is to eliminate early death parts (including structural, material, manufacturing, shipping, and storage defects) as early as possible before they are assembled into the product to avoid the cost of midproduction impacting timetables and failure during the mission. Stabilization Bake 1. Stabilization Bake Based on MIL – STD – 883 Method 1008, Condition C rules, the electronic components into constant temperature box, the rated storage temperature, the temperature rise to parts for 24 hours of [...]

16 Jan

Salt spray test chamber test principle and operation

Salt spray test chamber test principle Salt spray test chamber can do four kinds of tests: neutral salt spray test (NSS), copper accelerated acetate salt spray test (CASS), alternating salt spray test, acetate salt spray test (ASS test).Of course, different tests not only require different solutions, but also the design and structure of the box may be different. 1. The temperature of the neutral salt spray test chamber (NSS) is required to be at (35±2)℃, the humidity is greater than 95%, [...]

16 Jan

Salt spray tester after the completion of the test how to handle the sample?

Salt spray test is a kind of artificial simulation of salt spray environment test, compared with the atmospheric conditions of exposure test, it has significant advantages, corrosion environment can be controlled, the environment reproducibility is good, greatly saving the test time and human resources and financial resources.Exposing product defects through tests is an essential and important test means in the whole process of new product development, prototype test and product qualification appraisal test. Salt spray tester after the completion of [...]

16 Jan

Effective method to reduce the noise of constant temperature and humidity chamber

The constant temperature and humidity box is one of the climate simulation boxes, which is suitable for examining the moisture and heat aging of various products or plastic parts of tower core.And household appliances, instruments, meters, components and other electrical and electronic products, in high temperature, low temperature, hot and humid, alternating hot and humid environment conditions of adaptability.To do STH.The constant temperature and humidity case contains six systems: refrigeration system, heating system, mechanical environment, humidity system, sensor system, [...]

29 Dec

Application difference between colorimeter and spectrophotometer

How to establish color standards, improve product appearance, color quality control, and computer color matching?Here we have to mention a color detection tool – the color meter. At present, there are many kinds, brands and businesses of color measuring instruments. Some customers are not familiar with color measuring. In the face of various kinds of instruments, will there be a big price gap and different measurement results?Why are some called chromatic aberration instruments, and some called spectrophotometers?What are the differences [...]

29 Dec

Basic knowledge of color — Lab, Lch color three-dimensional space

1.1. The definition of “L, A, B”During 1950s and 1960s, Hunter Lab established color space, which was represented by THREE-DIMENSIONAL coordinates of L, A and B The “L” represents the brightness of the object: 0-100 represents the range from black to white “A” represents the object’s red-green color: positive values represent red, and negative values represent green “B” represents the object’s yellow and blue color: positive values represent yellow, and negative values represent blue 1.2.Establish the meaning of “L A B” color space The [...]

24 Dec

Knowledge of colour measurement – about the illumination and observation geometry of chromatic aberration instruments

Knowledge of colour measurement About the illumination and observation geometry of chromatic aberration instrumentsThe human eye cannot quantify color correctly, but we can use chromatic aberration instruments and spectrometers to measure color, which is quite simple.And the position relation among the lighting source, the measured sample and the sensor is the illumination observation geometric condition in the color measurement, referred to as geometric condition.Cie15:2004 recommends ten types of reflective sample measurement geometry:1.di:8 Diffuse illumination, 8° receiving, including specular reflection component.The sample [...]

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