Can bottled fountain pen ink go bad? I have heard it can and I have heard it can't. It is stored in a room temperature, dry dark place. Also, what happens if it should freeze?
pH level of the ink, maybe if it’s too neutral mold might grow. However for example for some vintage pens with ink sacs one needs to choose some safe inks with neutral pH levels to not damage the ink sac. So I guess the answer is it depends. I got interes...