I wanted to provide one more Jinhao x159 blog post for those who are interested in how their Extra Fine nibs behave.
I had written in my previous blog post that I already have the Avocado Green version of this pen with an Extra Fine nib and it wrote like a wet EF. I was curious to see if another EF nib would write the same way. I went ahead and ordered the orange version.
After my orange pen arrived, I checked the nib with my loupe. I could tell the nib was going to write well. I examined the feed and found the familiar blue ink that Jinaho uses to check their nib’s writing experience. I removed the section from the body and dropped in some water and let it run through the feed until the water came out clear.
I filled my orange pen with Brandy Dazzle and did a writing sample comparison. My sample shows my orange pen writes a bit finer than my green pen.

The nib writes smooth with just a tiny bit of feedback.

The line differences between these two Extra Fine nibs could be the result of the different inks I’m using. I find Oklahoma City to be a bit on the wet side and Brandy Dazzle to be a tad bit drier.
I’m happy to see the EF nibs, in general, write well on non-fountain pen paper and shows no bleed through. I have several desk journals I’ve been saving for my finer nib pens.
The EF nibs can handle shimmering inks without any issues.

Pens: Jinhao x159 with Extra Fine nibs in Orange and Dark Green
Inks: Diamine Brandy Dazzle (shimmer) and Robert Oster Oklahoma City
Journal: GLP Creations The Author Tomoe River Paper 68gsm