{"product_id":"encre-invisible-revelee-a-la-lumiere-uv-pour-stylo-plume-arcane","title":"Invisible ink revealed by UV light for fountain pen — ARCANE","description":"\u003cstyle\u003e .aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto} .aa p{margin:0 0 1rem} .aa a{color:#185FA5;text-decoration:underline} .aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 .5rem;letter-spacing:.3px;color:#1A1A1A} .aa .aa-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;padding:3px 10px;border-radius:20px;margin:0 4px 4px 0;vertical-align:middle;font-family:Georgia,serif} .aa .aa-badge-brun{background:#5C3A1E;color:#FFF9E8} .aa .aa-badge-noir{background:#1A1A1A;color:#FAC775} .aa .aa-mat{background:#fff;border:1px solid #E0DCD3;border-radius:10px;padding:1.2rem 1.4rem;margin:1.5rem 0} .aa .aa-mat 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details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0} .aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer} .aa details.aa-q summary::-webkit-details-marker{display:none} .aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1} .aa details.aa-q[open] summary::after{content:\"\\2212\"} .aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem} .aa .aa-a p{margin:0 0 .5rem} .aa .aa-badge-bleu{background:#185FA5;color:#FFF} .aa .aa-badge-orange{background:#C84B31;color:#FFF} .aa .aa-vars{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:1rem 0 1.5rem} .aa .aa-var{background:#fff;border:1px solid #d8d2c4;border-radius:8px;overflow:hidden} .aa .aa-var-v{height:90px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:13px;font-weight:700;letter-spacing:1px;text-transform:uppercase;padding:0 10px} .aa .aa-var-v.dark{color:#FAC775} .aa .aa-var-v.light{color:#1A1A1A} .aa .aa-var-i{background:#fff;border-top:1px solid #ebe5d6;padding:.6rem .8rem} .aa .aa-var-n{font-size:13px;font-weight:700;display:block} .aa .aa-var-d{font-size:11px;font-style:italic;color:#555;display:block} @media(max-width:600px){.aa .aa-ben,.aa .aa-links,.aa .aa-vars{grid-template-columns:1fr}} \u003c\/style\u003e\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eRevealed under UV\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-bleu\"\u003e18 ml\u003c\/span\u003e ARCANE \u003cstrong\u003einvisible ink\u003c\/strong\u003e writes messages that no one sees… until they are illuminated. Transparent on paper, it reveals itself in \u003cstrong\u003eluminous blue under UV light\u003c\/strong\u003e, like a secret that lights up in the dark. Presented in an \u003cstrong\u003e18 ml glass bottle\u003c\/strong\u003e with a black cap, this \u003cstrong\u003ecarbon-free fluorescent ink\u003c\/strong\u003e is designed for the \u003cstrong\u003efountain pen\u003c\/strong\u003e and the \u003cstrong\u003eglass dip pen\u003c\/strong\u003e, with which it flows smoothly. It comes in two versions: \u003cstrong\u003eink only\u003c\/strong\u003e, for those who already have an ultraviolet lamp, and the ink with a \u003cstrong\u003esmall silver metal UV pocket lamp\u003c\/strong\u003e, to reveal messages wherever you are. Secret letters, treasure map, mystery game, hidden signature on a notebook, or a drawing that only appears when night falls: ARCANE adds a touch of mystery to \u003cstrong\u003estationery\u003c\/strong\u003e and provides a highly visual demonstration of \u003cstrong\u003efluorescence\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background:#EEF4F6\"\u003e18 ml bottle\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eInk only\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eThe invisible ink bottle, to be revealed with your UV lamp\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background:#1A2A6A\"\u003eInk + lamp\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eInk + UV lamp\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eThe bottle and a small UV pocket lamp\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eFluorescence, or the art of making the invisible visible\u003c\/h3\u003e\n\n\u003cp\u003eA \u003cstrong\u003efluorescent\u003c\/strong\u003e ink contains molecules that absorb \u003cstrong\u003eultraviolet\u003c\/strong\u003e rays, invisible to the human eye, and immediately re-emit them in the form of visible light. Under normal lighting, the ink remains almost transparent; under a UV lamp, it glows a bright blue. As soon as the lamp is turned off, the glow disappears: this is what distinguishes fluorescence from phosphorescence.\u003c\/p\u003e\n\n\u003cp\u003eThe principle is old: it can be found in the security markings on banknotes or the entry stamps at nightclubs. With ARCANE, it becomes a writing game and a hands-on physics experience with light that you can do at home.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you will love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eInvisible to the naked eye\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe text remains discreet on the paper, hidden from view.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eLuminous blue under UV\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA beam of ultraviolet light is all it takes to make the message appear.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eDip pen and fountain pen\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA fluid ink for fountain pens and glass dip pens.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eOptional UV lamp\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA small pocket lamp to reveal messages anywhere.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e18 ml glass bottle\u003c\/span\u003e\u003cspan class=\"ds\"\u003eEnough to write many letters and secret pages.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eGames and puzzles\u003c\/span\u003e\u003cspan class=\"ds\"\u003eTreasure hunts, home escape games, birthday cards.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe ARCANE spirit\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eWhat is written for a single glance\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eAn \u003cstrong\u003earcane\u003c\/strong\u003e is a secret, knowledge reserved for a few initiates. Secret messages have always fascinated us: lemon juice revealed by flame, encrypted codes, letters hidden in a false bottom. ARCANE offers a modern and luminous version.\u003c\/p\u003e\n\n\u003cp\u003eDip your pen, write a few words that disappear as they dry, then hand over the letter. The recipient sees only a blank page… until the \u003cstrong\u003eUV beam\u003c\/strong\u003e brings forth text in an \u003cstrong\u003eelectric blue\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eIt is a game for puzzle lovers, a ritual for fountain pen enthusiasts, and a little physics lesson about this part of light that our eyes cannot see.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-ss\"\u003e\n\n\u003ch4\u003eWrite a secret message in 4 steps\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eLoad the pen.\u003c\/strong\u003e Dip a glass dip pen into the bottle, or fill a clean fountain pen converter.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eWrite on white paper.\u003c\/strong\u003e Draw your message on unlined, preferably matte paper, without pressing too hard.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eLet it dry.\u003c\/strong\u003e Wait for the ink to dry: the text becomes almost invisible in daylight.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eReveal the secret.\u003c\/strong\u003e In a dark room, shine a UV lamp on the page: the message lights up in blue.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhich version to choose\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\u003ctable\u003e\n\n\u003cthead\u003e\u003ctr\u003e\n\n\u003cth\u003eCriterion\u003c\/th\u003e\n\n\u003cth\u003eInk only\u003c\/th\u003e\n\n\u003cth\u003eInk + UV lamp\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eInvisible ink\u003c\/td\u003e\n\n\u003ctd\u003e18 ml\u003c\/td\u003e\n\n\u003ctd\u003e18 ml\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eUV pocket lamp\u003c\/td\u003e\n\n\u003ctd\u003eNo\u003c\/td\u003e\n\n\u003ctd\u003eYes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eReady to use\u003c\/td\u003e\n\n\u003ctd\u003eWith your own UV lamp\u003c\/td\u003e\n\n\u003ctd\u003eYes, upon receipt\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eIdeal for\u003c\/td\u003e\n\n\u003ctd\u003eRefills, already equipped enthusiasts\u003c\/td\u003e\n\n\u003ctd\u003eFirst purchase, gift\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e the result depends heavily on the \u003cstrong\u003epaper\u003c\/strong\u003e. Many printer papers are “blued,” meaning they are treated to look whiter: they glow themselves under UV and reduce contrast. Choose natural, cream, or light kraft paper for a more legible message. The UV lamp also makes certain minerals glow, such as the \u003ca href=\"\/en\/products\/yooperlite-brute-fluorescente-pierre-qui-s-illumine-sous-uv-luciole\"\u003eLUCIOLE yooperlite\u003c\/a\u003e.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e if you use a fountain pen, preferably reserve it for this ink and rinse it with clear water before returning to a regular ink. With a \u003cstrong\u003eglass dip pen\u003c\/strong\u003e, simply dip it in a glass of water and wipe it between inks.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eFluorescent invisible ink\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eVolume\u003c\/td\u003e\n\n\u003ctd\u003e18 ml\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eColor in daylight\u003c\/td\u003e\n\n\u003ctd\u003eTransparent\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eColor under UV\u003c\/td\u003e\n\n\u003ctd\u003eLuminous blue\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eComposition\u003c\/td\u003e\n\n\u003ctd\u003eCarbon-free ink\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eCompatible instruments\u003c\/td\u003e\n\n\u003ctd\u003eFountain pen, glass dip pen, dip pen holder\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBottle\u003c\/td\u003e\n\n\u003ctd\u003eGlass, black screw cap\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eVersions\u003c\/td\u003e\n\n\u003ctd\u003eInk only, ink + UV lamp\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLamp (version with lamp)\u003c\/td\u003e\n\n\u003ctd\u003eSilver metal UV pocket lamp, attachment ring\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRevelation\u003c\/td\u003e\n\n\u003ctd\u003eUltraviolet light, in a dark room\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended support\u003c\/td\u003e\n\n\u003ctd\u003eMatte unlined paper\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\u003cp\u003e\u003cstrong\u003ePrecautions for use:\u003c\/strong\u003e never point the UV lamp beam at your eyes, nor at the eyes of another person or an animal. The ink must not be ingested or applied to the skin; keep the bottle and lamp \u003cstrong\u003eout of reach of young children\u003c\/strong\u003e and close the bottle tightly after use. The ink can stain textiles: protect the table and your clothes.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA gift full of mystery\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eink + UV lamp\u003c\/strong\u003e version is an \u003cstrong\u003eoriginal gift\u003c\/strong\u003e ready to use: for a fountain pen enthusiast, a puzzle and escape game lover, a teenager who loves secret codes, or a couple who likes leaving sweet notes for each other. It is suitable for a \u003cstrong\u003ebirthday\u003c\/strong\u003e as well as \u003cstrong\u003eChristmas\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eTip: give it with a card written in invisible ink, and slip the lamp into the package so the recipient can discover the message themselves. To extend the experience, add a Lab object centered around light.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTo pair with\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-links\"\u003e\n\n\u003ca class=\"aa-link\" href=\"\/en\/collections\/lumiere-et-levitation\"\u003e\u003cspan class=\"lt\"\u003eLight \u0026amp; levitation\u003c\/span\u003e\u003cspan class=\"ld\"\u003eScientific objects that play with light\u003c\/span\u003e\u003c\/a\u003e\u003ca class=\"aa-link\" href=\"\/en\/products\/yooperlite-brute-fluorescente-pierre-qui-s-illumine-sous-uv-luciole\"\u003e\u003cspan class=\"lt\"\u003eLUCIOLE fluorescent stone\u003c\/span\u003e\u003cspan class=\"ld\"\u003eA yooperlite that glows under the UV lamp\u003c\/span\u003e\u003c\/a\u003e\u003ca class=\"aa-link\" href=\"\/en\/collections\/bureau-et-hi-tech\"\u003e\u003cspan class=\"lt\"\u003eOffice \u0026amp; high-tech\u003c\/span\u003e\u003cspan class=\"ld\"\u003eOriginal and practical office objects\u003c\/span\u003e\u003c\/a\u003e\u003ca class=\"aa-link\" href=\"\/en\/collections\/objets-scientifiques\"\u003e\u003cspan class=\"lt\"\u003eThe Lab\u003c\/span\u003e\u003cspan class=\"ld\"\u003eScientific curiosities to gift or collect\u003c\/span\u003e\u003c\/a\u003e\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow does UV invisible ink work?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003e\u003cp\u003eARCANE is a \u003cstrong\u003efluorescent ink\u003c\/strong\u003e: it contains compounds that absorb \u003cstrong\u003eultraviolet\u003c\/strong\u003e light, invisible to us, and re-emit it in the form of visible blue light. In daylight, the dry text is almost invisible on the paper. Under a \u003cstrong\u003eUV lamp\u003c\/strong\u003e, ideally in a dark room, it immediately lights up in blue. As soon as the lamp is turned off, the message disappears again: it can be revealed as many times as you wish. The darker the room, the more striking the contrast.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat pen can it be used with?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003e\u003cp\u003eThe ink is designed for \u003cstrong\u003efountain pens\u003c\/strong\u003e and \u003cstrong\u003eglass dip pens\u003c\/strong\u003e, and it can also be used with a classic dip pen holder or a fine brush. It is a \u003cstrong\u003ecarbon-free\u003c\/strong\u003e ink, fluid, designed for these instruments. With a fountain pen, we recommend rinsing it thoroughly before and after use, and ideally reserving it for this ink. With a glass dip pen, simply dip it in clear water and wipe it to change ink. However, it is not intended for ballpoint pens or felt-tip pens.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat does the version with the UV lamp contain?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003e\u003cp\u003eThe \u003cstrong\u003e“Ink + UV lamp”\u003c\/strong\u003e version brings together the \u003cstrong\u003e18 ml ink bottle\u003c\/strong\u003e and a \u003cstrong\u003esmall silver metal UV pocket lamp\u003c\/strong\u003e, equipped with a ring to attach it to a keychain. It allows you to reveal your messages upon receipt, without additional equipment. The \u003cstrong\u003e“Ink only”\u003c\/strong\u003e version contains only the bottle: it is intended for those who already have an ultraviolet lamp or want an ink refill. The bottle and lamp fit in a pouch, to reveal a message anywhere.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs the message really invisible?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003e\u003cp\u003eOnce dry, the ink is \u003cstrong\u003every discreet in daylight\u003c\/strong\u003e, but a slight reflection may remain visible depending on the angle, the paper, and the amount of ink deposited. For the most invisible message possible, write without loading the pen too heavily, on \u003cstrong\u003ematte paper\u003c\/strong\u003e, and let it dry thoroughly. Avoid glossy papers, on which the ink dries poorly, and very white “blued” papers, which glow themselves under UV and reduce the contrast of the revealed text.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow long does the message remain legible?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003e\u003cp\u003eThe text remains on the paper and can be \u003cstrong\u003erevealed with each pass of the UV lamp\u003c\/strong\u003e. Like all fluorescent inks, it may lose its brilliance if exposed to direct sunlight for a long time. To preserve a letter or secret page, store it away from light, in a notebook, an envelope, or a drawer. The bottle is best kept tightly closed, at room temperature and away from light. Properly stored, a secret letter can thus be reread for a long time, with each pass of the lamp.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat ideas are there for using invisible ink?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003e\u003cp\u003eThe uses are numerous: \u003cstrong\u003esecret letters and sweet notes\u003c\/strong\u003e, a birthday card with a double reading, clues for a \u003cstrong\u003etreasure hunt\u003c\/strong\u003e or a home escape game, a hidden signature on a notebook or drawing, discreet marking of your books and objects, a drawing that only reveals itself when night falls. In class or with family, it is also a playful way to explain \u003cstrong\u003efluorescence\u003c\/strong\u003e and the existence of a light that our eyes do not perceive. An 18 ml bottle allows you to write many pages.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs it a good gift idea?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003e\u003cp\u003eYes, especially in its version with a \u003cstrong\u003eUV lamp\u003c\/strong\u003e, ready to use. It is an \u003cstrong\u003eoriginal gift\u003c\/strong\u003e for a calligraphy or fountain pen enthusiast, a puzzle lover, a curious teenager, or a close couple. It is suitable for a \u003cstrong\u003ebirthday\u003c\/strong\u003e or \u003cstrong\u003eChristmas\u003c\/strong\u003e, and can accompany a notebook or a glass dip pen. For a successful surprise, write the greeting card itself in invisible ink and let the recipient reveal it. The small glass bottle with the black cap also makes a pretty object on a desk.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Atelier Atypique","offers":[{"title":"Ink only","offer_id":55002203816259,"sku":"AA-ARCANE-ENCRE-SEULE","price":29.9,"currency_code":"EUR","in_stock":true},{"title":"Ink + UV lamp","offer_id":55002203783491,"sku":"AA-ARCANE-ENCRE-LAMPE-UV","price":39.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/encre-invisible-uv-arcane-flacon-lumineux-avec-lampe-up.png?v=1793458112","url":"https:\/\/atelierproatypique.com\/en\/products\/encre-invisible-revelee-a-la-lumiere-uv-pour-stylo-plume-arcane","provider":"Atelier Atypique","version":"1.0","type":"link"}