C
SECTION C — CHEMISTRY AND METALLURGY
  
CHEMISTRY
 C03
GLASS; MINERAL AND SLAG WOOL
 C03B
MANUFACTURE, SHAPING, AND SUPPLEMENTARY PROCESSES

 C03C
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS