MULTI-MEDIA GRID PAPERS: Design Ideation brand sketch, drawing, watercolor and multi-media sheets are archive quality papers. Design Ideation brand GRID papers are recycled, acid free and suitable for ink, graphite, charcoal, marker and watercolor paints. The archival sheets won't bleed through and will stand the test of time. HANDMADE STUDIO BRAND. All Design Ideation brand products are made in the USA.