[serial] paint inspector, I want to say to you (1) - Thoughts from the assistant of the experiment w cleaning the windowsill

When w first came to the lab, he was assigned to my lab The first task assigned to him was to clean the windowsills of several labs Can wipe three times in a row, windowsill still "flowery" How does w work? For the first time, I used a dry rag to draw several circles of dust; for the second time, I used a wet rag, but it was not wrung dry, and there were many traces of water; for the third time, although I used a wrung wet rag, I did not clean it It can be seen that no matter how simple things seem, there are operating procedures Only by strictly following the procedures can we achieve satisfactory results The same is true for paint testing There are tests with simple procedures and tests with complex procedures Some items can be tested according to the steps specified in the standard, while some items can't only after repeated groping tests can we master certain skills and obtain effective test data or test results The inspectors must be careful and rigorous For each test item, they should pay attention to the details of the standard, understand the principle of the method, and "know its nature and know its reason", so as to ensure the accurate and reliable test data or test results The accuracy of the test data and the reliability of the test results fully reflect the skill level of the testing personnel For the laboratory, it is one of the core elements reflecting the comprehensive technical level of the laboratory Next, in the form of a special draft, we will invite senior inspectors of the national coating quality inspection center to share some coating testing experience, testing precautions, interpretation of standard methods and other articles irregularly in the form of "coating inspectors, I want to tell you" series, hoping to be helpful to the personnel engaged in testing in the coating industry You can also leave a message to us about the problems encountered in the routine inspection work The editor will feed back to the national paint quality inspection center in time, and then will sort out the documents and share them with you! [guide] paint inspector, I want to say to you (2) - Determination of nonvolatile content, have you done it right?