PCB News - Can the characters on the circuit board be removed?

Can the characters on the circuit board be removed?

There are different silk screen characters on the circuit board, mainly to print some related information of the circuit board product materials, product production information, product craftsmanship, etc. In addition, the existence of the characters is also to standardize the PCB circuit board design and facilitate SMT soldering And placement identification devices.

There are generally the following ways to deal with the characters on the circuit board: scrape off the font with a knife, first use ammonia water and then green oil, buy spray paint to spray fonts, paste labels on the fonts, sandpaper to polish the fonts, for different situations Need to use different methods.

If you want to remove the entire character ink on the circuit board, this is actually not realistic. If you simply remove a few characters on the circuit board, you can use a blade to carefully scrape off 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. Therefore, 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: first need to use 10%-20% NAOH (sodium hydroxide) to heat to a certain temperature (60-80 degrees), and then put the circuit board into it to soak After about 2 hours, you can use a plate washer to scrub all the ink on the surface of the plate.

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