1. Ash:<0.05 2. Processing Temperature:1200 3. Package:Plastic, carton, woven bag. 4 ... carbon felt is light in weight, small in specific heat, soft in texture, easy in operation, excellent in heat insulation, and 90% in the carbon felt is ... extremely superior used in the vacuum and inert atmosphere, especially in intermittent vacuum furnace as the excellent heat insulation material to save great energy ...