charcoal paper weight = 64 lb. (25" x 38" x 500 sheets) 95 g/m2 Strathmore's best charcoal paper. A staple for charcoal and pastel artists for over 70 years, this 100% cotton fiber paper has a traditional laid finish that provides the precise shading control needed for these media. Colors include bright white, white, black and nine tints. Acid Free. Series 500 is the standard of excellence.