Staedtler Lumocolor Chinagraph Pencils provide users with a premium all surface writing tool, particularly by exploration geologists. Either on mineral exploration projects or core drilling sites, which allow you to mark on surfaces of samples. The pencils use a greasy core wax which clings to most surfaces it touches and won’t disperse or bleed through. Therefore making them waterproof and fade resistant with the ability to write on geological core samples during the logging process.
