Liquid chalk pens are made out of water-base ink, and they are effortless to wipe off when used on non-porous surfaces. Despite the name, liquid chalk pens do not contain any chalk. The ink in liquid chalk pens comes from magnesium carbonate, while the other parts are comprised of a plastic barrel, a porous plastic nib, a cotton filament, a cap, and a tip made out of pressed fibres. Some forms of this ink only contain isopropyl alcohol, polyvinyl alcohol, ethyl alcohol, and colour additives. The water-based colour mixtures in liquid chalk pens are non-toxic and completely safe since you cannot inhale them. You can wipe them by using a cloth, but some brands provide wiping materials for convenience. Liquid chalk pens and modern chalkboards are an improvement and the ultimate solution to ancient boards and dust chalks.