Hardboard

{
  "id": "MLC-T-ENV-012844",
  "term": "Hardboard",
  "field": "Environment",
  "definition": "1. Composite panel composed of inter-felted cellulosic fibers made by dry or wet forming and pressing of a resinated fiber mat. Hardboard generally has a density of 0.50 grams per cubic centimeter (31.5 pounds per cubic foot) or greater.\n\n2. Panel manufactured from interfelted ligno-cellulosic fibers consolidated under heat and pressure to a density of 0.5 g/cu cm (31 lb/cu ft) or greater.\n\n3. Composite panel composed of cellulosic fibers, consolidated under heat and pressure in a hot press by: A wet process; or a dry process that uses a phenolic resin, or a resin system in which there is no formaldehyde as part of the resin cross-linking structure; or a wet formed/dry pressed process; and that is commonly or commercially known, or sold, as hardboard, including any product conforming to one of the following ANSI standards: Basic Hardboard (ANSI A135.4-2012) (incorporated by reference, see § 770.99), Prefinished Hardboard Paneling (ANSI A135.5-2012) (incorporated by reference, see § 770.99), Engineered Wood Siding (ANSI A135.6-2012) (incorporated by reference, see § 770.99), or Engineered Wood Trim (ANSI A135.7-2012) (incorporated by reference, see § 770.99). There is a rebuttable presumption that products emitting more than 0.06 ppm formaldehyde as measured by ASTM E1333-10 (incorporated by reference, see § 770.99) or ASTM D6007-02 (incorporated by reference, see § 770.99) are not hardboard.\n\n4. Flat panel made from wood that has been reduced to basic wood fibers and bonded by adhesive properties under pressure.\n\n5. Composite panel composed of cellulosic fibers, consolidated under heat and pressure in a hot press by: A wet process; or a dry process that uses a phenolic resin, or a resin system in which there is no formaldehyde as part of the resin cross-linking structure; or a wet formed/dry pressed process; and that is commonly or commercially known, or sold, as hardboard, including any product conforming to one of the following ANSI standards: Basic Hardboard (ANSI A135.4-2012) (incorporated by reference, see § 770.99), Prefinished Hardboard Paneling (ANSI A135.5-2012) (incorporated by reference, see § 770.99), Engineered Wood Siding (ANSI A135.6-2012) (incorporated by reference, see § 770.99), or Engineered Wood Trim (ANSI A135.7-2012) (incorporated by reference, see § 770.99). There is a rebuttable presumption that products emitting more than",
  "references": [
    "40 CFR 63.2292 (CFR 2013)",
    "40 CFR 429.11 (CFR 2013)",
    "40 CFR 770.3 (CFR 2017)",
    "40 CFR 49.123 (CFR 2013)",
    "Definition truncated. For full definition see, 40 CFR 770.3 (CFR 2018)"
  ],
  "url": "https://mlchart.com/terminology/environment/hardboard/"
}