{"product_id":"bigthumb-jumbo-black-poster-markers-5-pcs-3-15mm-acrylic-tip-permanent-multi-surface","title":"BIGTHUMB Jumbo Black Poster Markers 5 pcs — 3–15mm Acrylic Tip, Permanent Multi-surface","description":"\u003cp\u003e\u003cstrong\u003eBIGTHUMB Black Poster Markers Jumbo (5 pcs) are heavy-duty, water-based acrylic paint pens with a versatile 3-in-1 3–15mm tip that delivers bold, permanent black coverage on poster, rock, canvas, glass, wood, and more.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese jumbo black markers combine a smooth, quick-drying acrylic ink with a wide, durable felt nib so you can cover large areas or switch to finer strokes by changing the pen angle. Formulated to be non-toxic, acid-free, and low-odour, the markers offer consistent flow and waterproof permanence once dry, making them practical for signs, craft projects, mural mockups, and mixed-media art.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these markers handle different surfaces?\u003c\/h3\u003e\n\u003cp\u003eThe BIGTHUMB jumbo markers were designed for multi-surface use: their acrylic formula adheres reliably to porous and non-porous materials. Expect even coverage on paper and canvas, strong opacity on wood and posters, and solid permanence on glass or ceramics after curing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePoster and paper: bold, smear-resistant strokes for headlines and layouts\u003c\/li\u003e\n  \u003cli\u003eCanvas and wood: thick, opaque lines that layer well with paint\u003c\/li\u003e\n  \u003cli\u003eGlass and ceramic: long-lasting marks that resist light handling once fully dried\u003c\/li\u003e\n  \u003cli\u003eRocks and outdoor signage: waterproof finish suitable for decorative stonework and yard signs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tip sizes and line styles can I get from one pen?\u003c\/h3\u003e\n\u003cp\u003eEach pen uses a 3-in-1 nib that functions as fine, medium, or jumbo depending on how you hold it, delivering line widths roughly between 3mm and 15mm. This lets you move from precise lettering to large fills without swapping tools, and the thick felt tip maintains shape through heavy use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFine strokes (about 3mm): angled or tip-point placement for details and outlines\u003c\/li\u003e\n  \u003cli\u003eMedium strokes (5–8mm): natural holding angle for lettering and accents\u003c\/li\u003e\n  \u003cli\u003eJumbo fills (up to 15mm): broad, flat contact for posters and large fill areas\u003c\/li\u003e\n  \u003cli\u003eDurable tip: resists fraying to keep lines consistent project after project\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these markers safe and easy to use for group projects?\u003c\/h3\u003e\n\u003cp\u003eThe ink is water-based, non-toxic, and conforms to common safety standards, making the set suitable for classroom, studio, and home craft activities. The markers are low-odour and designed to avoid leaking, with caps that click closed to protect the nib and reduce drying during storage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSafety compliance: meets ASTM D-4236 and EN-71 toy safety guidelines\u003c\/li\u003e\n  \u003cli\u003eLow odour: comfortable for indoor work and longer sessions\u003c\/li\u003e\n  \u003cli\u003eClick-close caps: helps preserve nib life and prevents accidental spills\u003c\/li\u003e\n  \u003cli\u003eQuick drying: reduces smudging when working in layers or transport\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I store and prep the pens for best results?\u003c\/h3\u003e\n\u003cp\u003eStore markers horizontally to keep the ink evenly distributed and recap after use to protect the tip. If flow slows, gently shake the pen with the cap on or press the tip briefly to reactivate the pigment—avoid prolonged pressing to preserve nib shape.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStorage: lay flat to maintain consistent ink saturation\u003c\/li\u003e\n  \u003cli\u003ePriming: shake and depress tip lightly for first use or after inactivity\u003c\/li\u003e\n  \u003cli\u003eCleaning: wipe nib edges on scrap paper if excess buildup occurs\u003c\/li\u003e\n  \u003cli\u003eLongevity: replace caps firmly to extend the marker’s usable life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Artists, teachers, sign-makers, crafters, and hobbyists who need bold, reliable black ink will appreciate these BIGTHUMB jumbo markers. The combination of a wide, long-lasting tip and a versatile 3-in-1 nib makes them suitable for mural sketches, poster design, rock painting, calligraphy accents, and everyday DIY projects where fast coverage and strong contrast matter. They’re also a practical gift for students and creative families who want a dependable, multi-surface black marker set.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these markers work on glass and ceramics?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The acrylic ink adheres to glass and ceramic and becomes water-resistant once fully dry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What line widths can one marker create?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: One 3-in-1 nib produces lines from about 3mm up to 15mm by changing angle and pressure.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BIGTHUMB","offers":[{"title":"Default Title","offer_id":55253732458833,"sku":"B0CKN8FQQ5","price":31.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/bigthumb-front-packaging.jpg?v=1791663817","url":"https:\/\/craftiche.co.uk\/products\/bigthumb-jumbo-black-poster-markers-5-pcs-3-15mm-acrylic-tip-permanent-multi-surface","provider":"Craftiche","version":"1.0","type":"link"}