{"product_id":"van-diemans-professional-natura-dualis-underflow-4ml-fountain-pen-ink-sample","title":"Professional - Natura Dualis - Underflow - 4ml Fountain Pen Ink Sample","description":"The quiet, unseen current just below the surface.\u003cbr\u003e\u003cbr\u003eThe Natura Dualis collection is built around moments in nature where contrast and harmony coexist, formulated for movement rather than a single flat colour. Underflow flows as a cool sea-glass blue that fades into mauve-violet underlayers and rims itself with teal-toned halos where it pools. In fine nibs it reads clean and modern. In broad nibs on shading paper it unfurls into a separated spectrum of oceanic tones with a real sense of motion. Contemplative, modern, and deceptively complex.\u003cbr\u003e\u003cbr\u003eTry before you commit to a full bottle. Each sample is hand-decanted into a 4ml glass vial with a screw-top cap and a labelled colour name, so you can test the shading, sheen, and flow in your own pens on your own paper first.\u003cbr\u003e\u003cbr\u003eVolume: 4ml glass sample vial\u003cbr\u003eSeries: Van Dieman's Professional - Natura Dualis\u003cbr\u003eBase colour: Cool sea-glass blue with mauve-violet underlayers\u003cbr\u003eSheen: Teal-toned halos\u003cbr\u003eDye-based, water-based ink\u003cbr\u003eDecanted in-house from a full 40ml bottle\u003cbr\u003eHandmade in Launceston, Tasmania, Australia\u003cbr\u003e\u003cbr\u003eA perfect way to build a swatch library or fill an ink-sample flight. Ideal for junk journaling, lettering, fountain pen collectors, and stationery lovers who want to explore Van Dieman's Tasmanian inks without committing to a full bottle.","brand":"Van Dieman's","offers":[{"title":"Default Title","offer_id":67419379171632,"sku":"VD-5HQQ6","price":5.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/0952\/7344\/files\/20250608_175633.jpg?v=1785467491","url":"https:\/\/5heartspaper.com\/products\/van-diemans-professional-natura-dualis-underflow-4ml-fountain-pen-ink-sample","provider":"5 Hearts Paper","version":"1.0","type":"link"}