{"type":"firestarter.listing","listing":{"id":"lst_snbOHLE7","product_name":"Viridian Watercolor Paint, Half-Pan, ML","category":"Watercolor Paint, Half-Pan","description":"\nViridian Watercolor Paint, Half Pan\nGreenleaf &amp; Blueberry Professional Handmade Watercolors\n\nColor Overview\n\n\n\n Color Name\nViridian\n\n\nPigment\nViridian (Hydrated Chromium Oxide)\n\n\nPigment Index No.\nPG18\n\n\nChemical Formula\n\n\nCr2O3 • 2 H2O\n\n\n\nSeries No.\nSeries 5\n\n\nLightfastness Rating\n5/5 Very Lightfast\n\n\nToxicity\n2/5 California recognizes trace amounts of a possible manufacturing bi-product a possible carcinogen\n\n\nHue\nGreen Category\n\n\nChroma\n4/5 Moderate to High Chroma\n\n\nTransparency\n1/5 Transparent\n\n\nPigment Type\nSynthetic\n\n\nGranulation\nYes\n\n\nValue Range\n4/5 Moderate to High Range\n\n\nTinting Strength\n3/5 Moderate Strength\n\n\nStaining\nNo Staining\n\n\nFlocculation\n2/5 Dispersing\n\n\nVariegation\nNo\n\n\n\n\n\n\n\nCombination Swatch\n \n\n\n\n\n\nGravity Wash Swatch\n\n\n\n\n\n\nValue Scale Swatch\n\n\n\n\n\n\n\n\nColor Description\nOur Viridian displays a cool, blue-ish green.  It has a wide value range, but only moderate tinting strength, making this a wonderfully buildable color.\nThis color disperses nicely, but not wildly, and granulates beautifully.  It is also very transparent, making it an excellent choice for glazing.\nA classic pigment on the watercolor palette, it dazzles at full concentration in our version. \nEach of the following swatched have been painted onto Arches Cold Pressed 140 lb. watercolor paper.\n\nColor Story\nViridian is a synthetic pigment that was discovered in the ninetheenth century.  It was a very significant find because as a lightfast and non-toxic brilliant green, it speedily replaced the poisonous Emerald Green that was in use at the time.  \nA French Chemist known as Pannetier developed the first true Viridian pigment in 1838, and was kept secret.  It seems another color chemist stumbled into the reaction and patented the process in 1859.  Ten years later it was introduced by Winsor &amp; Newton as an artist's color.\nWell-known artists such as Van Gogh and other French Impressionists used it in their work.  Since then, it has become a staple on the watercolorist's palette i","images":["https://cdn.shopify.com/s/files/1/1696/5931/files/ViridianListingJPEG.jpg?v=1710451915","https://cdn.shopify.com/s/files/1/1696/5931/files/IMG_3645.jpg?v=1710451928"],"price":15.05,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:21.908Z","product_rating":null,"product_rating_count":0,"seller_rating":null,"seller_rating_count":0,"units_sold":0,"reviews":{"count":0,"top":[]},"videos":[]},"share_url":"https://firestarter.network/l/lst_snbOHLE7","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_snbOHLE7' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Viridian Watercolor Paint, Half-Pan, ML' and a budget_max comfortably above $15.05 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}