With over 54 years of experience, Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Together with this core group of products, we continue to meet the needs our customers with our expanding range of fine art, hobby and craft supplies, our large selection of drawing room furniture, and our wide assortment of exclusively-designed products. True color reproduction. Outstanding acid-free ink is archival quality waterproof waterbased has no odor will not smear nor feather when dry and will not bleed through most papers. Use for graphic art sketching pen and ink illustrations awards freehand art calligraphy as well as general letter writing & legal documents. Available in 6 point sizes. AP non-toxic.