I have had 3 roland eco solvents in my home - OEM inks not bad at all, aftermarket stink terribly and cause more problems. as to if it is safe I have no idea but had them for 7 years in our house running. Just keep it printing every couple of days - biggest issue is people buying them because printing is sexy and easy and not enough use they are replacing very expensive heads - and the reason we sold out last one as we started going on 3 week vacations and hope to snowbird someday - I could count on at least 1 new head after 3 weeks away, even with the printer doing it's own self cleanings 3 times a day. they don't like to sit unused and will let you know about it