{"product_id":"golden-open-slow-drying-acrylic-paint-cobalt-blue-pb28-2-fl-oz-extended-open-time","title":"GOLDEN OPEN Slow-Drying Acrylic Paint, Cobalt Blue (PB28) — 59 ml, Extended Open Time","description":"\u003cp\u003e\u003cstrong\u003eGOLDEN OPEN Slow-Drying Acrylics in Cobalt Blue is a professional, slow-drying acrylic paint that delivers rich, deep PB28 colour with extended working time for blending and glazing.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 2 fl. oz. tube contains a semi-opaque, highly durable cobalt blue pigment (PB28) formulated for artists who want the flexibility of acrylics with the handling qualities of oil paints. The OPEN series gives you more time on the palette and canvas to mix, soften edges, and build translucent layers without sacrificing the permanence and lightfastness expected by professional painters. The formula is vegan and rated ASTM Lightfastness I (Excellent), making it suitable for serious studio work, plein air sessions, and detailed portrait or landscape work where chroma and longevity matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does GOLDEN OPEN Cobalt Blue improve blending and glazing?\u003c\/h3\u003e\n\u003cp\u003eThe slow-drying vehicle in GOLDEN OPEN keeps paint workable longer, allowing smoother transitions and refined glazes. You can create subtle colour shifts and layered transparencies without constant re-wetting or retouching, which is particularly helpful for nuanced skin tones, skies, and atmospheric effects.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExtended open time for multi-minute wet blending.\u003c\/li\u003e\n  \u003cli\u003eMaintains colour integrity for layered glazing.\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard acrylic mediums to adjust viscosity.\u003c\/li\u003e\n  \u003cli\u003ePreserves mixed hues on the palette for later use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the pigment and permanence characteristics of this cobalt blue?\u003c\/h3\u003e\n\u003cp\u003eThis tube uses pigment PB28 (oxides of cobalt and aluminium), celebrated for its clarity and depth. The paint is ASTM Lightfastness I, indicating excellent resistance to fading when used in appropriate archival contexts; it is semi-opaque, giving a balance between coverage and luminous layering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePigment: PB28, known for strong, stable blue chroma.\u003c\/li\u003e\n  \u003cli\u003eASTM Lightfastness I — rated Excellent for longevity.\u003c\/li\u003e\n  \u003cli\u003eSemi-opaque body suitable for both coverage and glazing.\u003c\/li\u003e\n  \u003cli\u003eVegan formulation, free of animal-derived additives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow can I integrate OPEN Cobalt Blue with other paints and mediums?\u003c\/h3\u003e\n\u003cp\u003eOPEN paints mix readily with conventional fast-drying acrylics, allowing you to fine-tune working time across a palette. Use standard GOLDEN acrylic or OPEN-compatible mediums to modify sheen, flow, or drying speed without compromising pigment performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMixable with fast-drying acrylics to control open time.\u003c\/li\u003e\n  \u003cli\u003eWorks with glazing mediums for transparent layers.\u003c\/li\u003e\n  \u003cli\u003eCan be thinned for washes or thickened for texture with appropriate mediums.\u003c\/li\u003e\n  \u003cli\u003eRetains pigment strength when combined with other GOLDEN products.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the 2 fl. oz. tube fit into studio practice and travel?\u003c\/h3\u003e\n\u003cp\u003eThe compact 2 fl. oz. size is practical for sampling, plein air painting, and limited-palette setups. It’s large enough for multiple small works yet small enough to fit into a travel kit, letting you test GOLDEN OPEN’s handling before investing in larger tubes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePortable tube ideal for plein air and on-location work.\u003c\/li\u003e\n  \u003cli\u003eSufficient volume for studies, portraits, or mixed-media pieces.\u003c\/li\u003e\n  \u003cli\u003eEasy to store and reseal to preserve remaining paint.\u003c\/li\u003e\n  \u003cli\u003eSuitable as a single-tube purchase or part of a broader palette.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: GOLDEN OPEN Slow-Drying Acrylics, Cobalt Blue, 2 fl. oz. is designed for professional artists, advanced students, and serious hobbyists who need extended open time for blending and glazing without compromising archival pigment quality. It’s especially useful for portrait painters, landscape artists, and anyone who wants precise control over colour transitions and layered effects while retaining the permanence and lightfastness of artist-grade acrylics.\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: Is GOLDEN OPEN Cobalt Blue lightfast?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This paint is rated ASTM Lightfastness I (Excellent), indicating strong resistance to fading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mix OPEN with regular acrylics?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. OPEN mixes with fast-drying acrylics to adjust working time and maintain pigment performance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GOLDEN","offers":[{"title":"Default Title","offer_id":55255205708113,"sku":"B001TEA9AW","price":37.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/golden-open-cobalt-blue-front-tube.jpg?v=1791699816","url":"https:\/\/craftiche.co.uk\/products\/golden-open-slow-drying-acrylic-paint-cobalt-blue-pb28-2-fl-oz-extended-open-time","provider":"Craftiche","version":"1.0","type":"link"}