Robert Oster's love of fountain pens resulted in the production of their inks, with a wide selection of colours, including shimmering and sheening inks.
This set of 'Sinner' themed inks includes some beautiful colours, with great names.
Sinner's Dream is a shimmering ink, so a bit of extra care should be taken with it. Avoid letting it dry out in your pen, and while it's safe to use in fountain pens, it may be better to stick with more 'normal' inks for any particularly valuable pens.
