The HP 305 ink cartridges are specifically designed for HP printers, so they won’t be compatible with other brands. If you're using an HP printer, though, you’re good to go! Be sure to check your printer model to confirm compatibility with the HP 305 series before purchasing.

Not necessarily! If one cartridge runs out first, you can replace it on its own. Your printer will still work with just one cartridge—if the black ink runs out, for example, you can still print in color, though the quality might not be as good. It’s always best to replace both cartridges for optimal performance, but you don’t have to do it simultaneously.

Yes! HP 305 ink is designed to resist smudging, even on regular paper. It’s great for home and office printing where you’re handling documents frequently. If you’re printing photos or other projects, just make sure to let the ink dry a bit before touching it to avoid any smearing.