METHOD OF FORMING LINE OF INK

摘要

PURPOSE:To provide a method of forming a line of ink whereby the formation of line of ink can be accomplished without staining hands or clothes, and the newest line of ink, if re-formed, can easily be discriminated from the former one because the former one can disappear. CONSTITUTION:A line of ink is formed on a concrete surface by using an ink containing a colorant which reacts with hydrated cement changing in color from colorlessness to a some color and can fade with the lapse of time after coloration.