37 Boris Marker, 9x12 Marker Pad SKU - 037P09121C Size - 9x12 Creative Process: Stage 1 Concept. A semi-transparent marker paper that is excellent for alcohol & acrylic marker sketch work. Guides can be seen through the sheet making it a useful paper for hand lettering and calligraphy. Resists feathering and bleeding while keeping lines crisp and colors vibrant. Acid Free. Made in the USA.