I have an old Parker squeeze converter which at first sight seems to work well, holds a lot of ink and is not leaking.
However when I squeeze it the rubber has some cracks in one part , the rubber is not yet cracked completely but sooner or later it will. I can still use it and it also feels flexible.
I was thinking if there is any preventing work or something.
Can I melt the rubber with the hot red point of a needle so the crack is no longer spreading ?
Or can I glue it somehow?