Inks are very tough to remove. The best place to start is to determine the type of ink. There are generally three types of inks commonly used: alcohol-based, solvent-based and soy-based. The best all-round ink remover used to be the ketone solvents, but their nasty aromas and questionable toxicity have forced most companies to phase them out. Which, of course, leads to your question.
Stencil, Squeegee and Misprint Cleaner – ScreenClean™ (#MCC-CDI) is your best first choice because it has been initially formulated as an ink remover. The Alcohol-Enhanced Flux Remover – ProClean™ will remove alcohol-based inks, but this is a mild cleaner and alcohol-based inks are fairly rare. Another unusual application for the popular No-Clean Flux Remover – VeriClean™ can remove silicone-based inks. When nothing else works, try the Heavy Duty Flux Remover – SuprClean™. We have seen it wipe away ball-point pen inks. We have tried it on computer housings, keyboards, printers and even silk ties. It works great. But be careful: it will eat soft plastics!