Jinhao X750 Short Review

[truthpil]

 

Could you please explain what you mean by the "vacuum effect" caused by the converter sealing too tightly?

My understanding is that the converter should seal tightly and that a vacuum is prevented by air passing through the channel into the converter.

 

I may not be using the correct physics terms, but if a vacuum is created inside the ink chamber of the converter, then the ink will just stay in there and not come out after writing a few sentences. The Italix Parson's Essential is notorious for this, but can sometimes go a whole page before the skipping starts. One way to solve this is to break up the surface tension of the ink in the converter by adding a ball or something. However, Jinhao converters don't have any ball inside. The old ones didn't either and were more cheaply made, but for some reason they didn't have the surface tension issue.

Edited December 18, 2017 by TruthPil

[k3eax]

 

I may not be using the correct physics terms, but if a vacuum is created inside the ink chamber of the converter, then the ink will just stay in there and not come out after writing a few sentences. The Italix Parson's Essential is notorious for this, but can sometimes go a whole page before the skipping starts. One way to solve this is to break up the surface tension of the ink in the converter by adding a ball or something. However, Jinhao converters don't have any ball inside. The old ones didn't either and were more cheaply made, but for some reason they didn't have the surface tension issue.

 

Surface tension and vacuum would seem to be largely unrelated and so I've yet to fully understand your diagnosis. I would suggest that you consider that the "ink starvation" experienced by the user to be the result of the feed's failure to properly meter the entrance of air at atmospheric pressure into the converter.

[truthpil]

Surface tension and vacuum would seem to be largely unrelated and so I've yet to fully understand your diagnosis. I would suggest that you consider that the "ink starvation" experienced by the user to be the result of the feed's failure to properly meter the entrance of air at atmospheric pressure into the converter.

 

I know my terminology may be off, but regardless of how you want to explain it, the problem is often （not necessarily always） solved by changing the converter to one that doesn't hold back the ink. If that doesn't work then it's probably an issue with the feed as you said, although I've never had any flow problems with feeds on the x750. Edited December 19, 2017 by TruthPil