Hancocks White Tailors Marking Chalk (Triangle Shape) sold here in 50 pieces per box. Traditional Tailors Chalk made from China Clay. We make the chalk so that the mark will stay on whilst work is in progress and as easy as possible to brush off when work has finished. We warn customers to take care to test the fabric before starting work as some times the chemical finish in the cloth reacts with the chalk making it difficult to remove. Therefore test first and if in any doubt make your marks on the reverse side of the fabric. Triangle Shape Made in U.K.