source:Industry News release time:2022-10-10 Article author:yu Popular:pcb
There are different silk screen characters on the circuit board, mainly to print some circuit board product materials, product production information, product process and other related information. In addition, the existence of the characters is also to standardize the PCB circuit board design and facilitate SMT patch welding. and placement identification devices.
There are generally the following methods to deal with the characters on the circuit board: scraping off the font with a knife, first using ammonia water and then applying green oil, buying and spraying the font, sticking a label on the font, sanding the place with the font, according to different situations. A different approach is required.
If you want to remove the entire character ink on the circuit board, it is actually unrealistic. If you simply remove a few characters on the circuit board, you can use a blade to carefully scrape the characters.
If you really want to remove the text ink on the entire circuit board and reprint the characters, it will inevitably damage the solder resist ink, so if you want to operate, you must remove the entire board of the character ink and solder resist ink. After that, re-print the solder mask and characters. The operation method is: firstly, you need to use 10%-20% NaOH (sodium hydroxide solution) to heat to a certain temperature (60-80 degrees), and then put the circuit board into it and soak it. After about 2 hours, you can use a plate washer to scrub and wash off all the ink on the plate.
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