SPECIFICATION:
Materials: Porcelain enamel writing surface. Provide balanced high pressure laminated porcelain enamel writing boards of 3 ply construction consisting of face sheet, core material and backing.

1. Face sheet Lemco #200: Provide face sheet of 28 gauge (24 gauge optional) enameling grade coil steel suitable for application of architectural porcelain. Both surfaces of steel will receive a ground coat of ceramic frit fused to the metal. A color cover coat of ceramic frit applied and fused to one surface of the ground coat. Firing temperature will be approximately 1500 degrees. Product to be manufactured in accordance with the performance specifications PEI Spec. S104 for porcelain enamel steel chalkboards established by the Porcelain Enamel Institute.
2. Cover coat: Provide standard matte writing surface for use with chalk.
3. Core: Provide the manufacturer's specially engineered industrial grade 7/16" inch thick high density particle board, formed and bonded with resin creating a substrate for improved laminating. Material complies with requirements of ANSI A208.1, grade 1-M-1. (1/2" hardboard of 1/2" fiberboard is available but not recommended).
4. Balancing/Backing sheet: Provide manufacturer's standard 0.0015 thick aluminum foil backing, cleaned and full hard tempered for rigidity. Provides moisture barrier. (.005, .015 thick aluminum foil or 28 gauge steel optional).
5. Laminating adhesive: Provide manufacturers standard environmentally safe high performance type adhesive.
6. Trim: Any of Lemco trim types may be specified.

Standard Panel Size: 4 foot high by 4, 6, 8, 12 & 16 foot lengths. Five foot high available by special order.

No. 200 - Porcelain enamel chalkboard on steel face sheet.
No. 204 - No. 200 chalkboard on 7/16" industrial grade particle board.
No. 205 - No. 200 chalkboard on 1/2" fiberboard.
No. 201 - No. 200 chalk board on 1/4" hardboard
No. 202 - No. 200 chalkboard on 1/2" hardboard.