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Today I'm reviewing Diamine Imperial Purple ink Imperial Purple is a true purple that leans more towards the blue side of the colour spectrum. It’s an ink from the standard Diamine ink range. It’s a saturated ink that can show a little shading with finer nibs. I found it flowed well with all of the pens I tried it in, felt neither wet nor dry, and it’s lubrication was nice and smooth across the page. My review was written on cheap printer paper, that is quite absorbent, and I saw no spread or show-through. The lines were crisp and it dried quickly. On Field Notes paper it didn’t spread or feather, and only showed through a little. Writing on the reverse side of all of the papers I used would be acceptable as show-through doesn't look as bad on paper than when it is scanned and shown on screen. It's not sold as a waterproof ink but showed good water resistance. I used running water on the right half of the water test square. Purple inks are quite difficult to represent accurately on screen, I've done my best to get this to match the colour that it is on the paper. Flow Rate: Good - neither particularly wet nor dryLubrication: Good - felt smooth across the pageNib Dry-out: Not noticed.Start-up: Immediate.Saturation: SaturatedShading Potential: Some shading seen with F nib.Sheen: None noticed.Show-Through:CiaK by InTempoOxford paperSilvine NotebookRhodia GraphField NotesHobonichi Techo paper.Tomoe River 52gsm paper (not very much)Spread / Feathering / Woolly Line: Not seen on any paper I used, even Field NotesNib Creep / “Crud”: Not seen, even after several days in the penStaining (pen): Not seen after several days - easy clean-upStaining (hands): Easy clean-up off of skin with bar soap.Clogging: Not seen.Water resistance: Not sold as waterproof, but shows good water resistance.Availability: Available in 80ml and 30ml bottles plus cartridges from Diamine Inks web-site and many other outlets.