Lehr

{
  "id": "MLC-T-IND-003300",
  "term": "Lehr",
  "field": "Industrial and trades",
  "definition": "A long, temperature-controlled oven used to slowly cool newly formed glass objects, a process known as annealing. This gradual cooling relieves internal stresses that develop during shaping, preventing the glass from cracking or shattering. The temperature profile within a lehr is carefully controlled, typically decreasing from over 500 degrees Celsius to ambient temperature over several hours.",
  "subject": "Glass and ceramics",
  "references": [
    "lehr Definition & Meaning (Merriam-Webster)"
  ],
  "translations": {
    "de": "Lehr",
    "es": "horno de recocido",
    "fr": "arche de recuisson"
  },
  "url": "https://mlchart.com/terminology/industrial/lehr/"
}