{
  "opening": "Old, wet PLA is the explanation the highest-scored comment gives: it gets brittle, and cheap filament gets worse. Dry it at the temperature on its own row, or reject the spool if it arrived that way. Do not boil it.",
  "question": "Why is my filament brittle and snapping?",
  "slug": "brittle",
  "useCase": "drying",
  "useCaseLabel": "Drying",
  "updated": "2026-10-19",
  "shortAnswer": "Old, wet PLA is the explanation the highest-scored comment gives: it gets brittle, and cheap filament gets worse. Dry it at the temperature on its own row, or reject the spool if it arrived that way. Do not boil it.",
  "recommendedMaterials": [
    "pla"
  ],
  "printerConsiderations": [
    "A snap in the feed path is the brittle-spool problem. A part that shatters is Prusa's description of printed PLA, which breaks along layers or into shards on impact. Drying the spool does not change that.",
    "Bambu's AMS note says filament that is too brittle, including certain PLA Wood and some carbon-fiber nylons, can break inside the AMS channel. That is a feed failure, not a reason to raise the print temperature.",
    "The score-8 comment that says boil the spool in salty water is a joke. It is not a drying schedule."
  ],
  "pros": [
    "The score-464 comment and the drying rows point at the same fix: moisture, then a published dry cycle.",
    "The score-560 comment gives the other branch: if it arrived brittle, send it back."
  ],
  "cons": [
    "No excerpt in this set measures moisture. 'Moist' is the comment, not a percentage.",
    "Drying temperatures differ by brand. A single 50 °C (122 °F) cycle would mis-state Prusament and PolyLite."
  ],
  "community": "r/3Dprinting 1myq0ge is brittle PLA. The score-560 comment says if it arrived that way, do not accept it. The score-464 comment says old, moist PLA gets very brittle, and that cheap filament is worse. r/3Dprinting 1nff6t6 is a photo of snapped PLA. The score-8 comment says 8 to 10 minutes in salty boiling water. The score-3 comment says wash the build plate. Neither fixes a brittle spool. No excerpt was supplied for r/FixMyPrint wgtl1k, r/FixMyPrint uh9ge7, or r/ender3 123qlw5. The bank titles there are glow filament, a snap in the path, and a snapping sound that might be the gear.",
  "related": [
    "drying",
    "storage",
    "pla_print",
    "filament_quality",
    "clog"
  ],
  "faq": [
    {
      "q": "Will drying fix a spool that has been brittle for years?",
      "a": "The score-464 comment says old and moist. Drying addresses the moist half, at the row's temperature. The comment does not promise that a very old spool recovers. If the spool was brittle on arrival, the higher-scored comment says reject it."
    },
    {
      "q": "Why not the boiling-water comment?",
      "a": "It is a pasta joke under a photo of snapped filament. The published dry cycles are 50 °C (122 °F) for 8 hours on PLA Basic, 45 °C (113 °F) for 6 hours on Prusament PLA, and 55 °C (131 °F) for 6 hours on PolyLite PLA."
    }
  ],
  "sources": [
    {
      "title": "Bambu PLA Basic technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_PLA_Basic_Technical_Data_Sheet_bf3411ce-be39-4db7-9669-1b4671d2196b.pdf?v=1734060943",
      "kind": "datasheet"
    },
    {
      "title": "Polymaker PolyLite PLA technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PLA_TDS_EN_V5.4.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Prusa Knowledge Base, drying filament",
      "url": "https://help.prusa3d.com/article/drying-filament_332086",
      "kind": "manufacturer"
    },
    {
      "title": "Prusa Knowledge Base, PLA",
      "url": "https://help.prusa3d.com/article/pla_2062",
      "kind": "manufacturer"
    },
    {
      "title": "Community source, r/3Dprinting 1nff6t6",
      "url": "https://www.reddit.com/r/3Dprinting/comments/1nff6t6/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting 1myq0ge",
      "url": "https://www.reddit.com/r/3Dprinting/comments/1myq0ge/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/FixMyPrint wgtl1k",
      "url": "https://www.reddit.com/r/FixMyPrint/comments/wgtl1k/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/FixMyPrint uh9ge7",
      "url": "https://www.reddit.com/r/FixMyPrint/comments/uh9ge7/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/ender3 123qlw5",
      "url": "https://www.reddit.com/r/ender3/comments/123qlw5/",
      "kind": "reddit"
    }
  ],
  "recommendations": [
    {
      "rank": 1,
      "note": "PLA Basic lists a nozzle of 190–230 °C (374–446 °F) and a bed of 35–45 °C (95–113 °F). The drying row is 50 °C (122 °F) for 8 hours, from the Bambu data sheet. That is the dry cycle, not a print temperature.",
      "brand": "Bambu Lab",
      "product": "PLA Basic",
      "material": "PLA",
      "url": "/brand/bambu-lab/pla-basic",
      "nozzle": "190–230 °C (374–446 °F)",
      "bed": "35–45 °C (95–113 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_PLA_Basic_Technical_Data_Sheet_bf3411ce-be39-4db7-9669-1b4671d2196b.pdf?v=1734060943",
      "affiliateUrl": null
    },
    {
      "rank": 2,
      "note": "Prusament PLA lists 205–225 °C (401–437 °F) and a bed of 40–60 °C (104–140 °F). Drying is 45 °C (113 °F) for 6 hours. Prusa's PLA article calls the printed plastic brittle. That is the part, and it is a different sentence from a spool that snaps in the extruder.",
      "brand": "Prusament",
      "product": "PLA",
      "material": "PLA",
      "url": "/brand/prusament/pla",
      "nozzle": "205–225 °C (401–437 °F)",
      "bed": "40–60 °C (104–140 °F)",
      "pricePerKg": null,
      "datasheetUrl": null,
      "affiliateUrl": null
    },
    {
      "rank": 3,
      "note": "PolyLite PLA lists 190–230 °C (374–446 °F) and a bed of 25–60 °C (77–140 °F). Drying is 55 °C (131 °F) for 6 hours. Three PLA rows, three drying temperatures. Use the row you are holding.",
      "brand": "Polymaker",
      "product": "Polylite PLA",
      "material": "PLA",
      "url": "/brand/polymaker/polylite-pla",
      "nozzle": "190–230 °C (374–446 °F)",
      "bed": "25–60 °C (77–140 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PLA_TDS_EN_V5.4.pdf",
      "affiliateUrl": null
    }
  ]
}