Acid free, white, ultra-smooth 110 lb. (180 gsm) sheet especially designed for detailed work. Approved for use with Copic and Touch markers. Paper has excellent surface for use with pen and ink, crowquill pens, technical pens, water-based and permanent markers. The double wire binding creates a flat surface, allowing the artist to draw across the page. The sturdy black chipboard cover can be personalized with acrylics to make your journal as distinctive as your artwork! Extra heavyweight 100% recycled chipboard front and back cover make these books perfect for field work. Micro-perforated to true size for easy sheet removal. Proudly made in the USA.