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poster board
Birch plywood this thin requires careful milling to maintain structural integrity without splintering
The renewable bamboo construction shows its natural grain pattern rather than hiding under stain or paint
The curved bristles also provide spring and snap that synthetic alternatives struggle to replicate
Hard Final Spray Fixative finish:matte poster boardCharcoal and pastel drawings remain vulnerable until you seal them properly. Grumbacher Hard Final Fixative penetrates the surface and locks media in place with a durable, protective layer that resists smudging and fingerprints through handling, framing, and storage. The spray applies evenly in a single coat, eliminating the guesswork of multiple applications while maintaining the colorless transparency that preserves your original values and tones.