These tools look similar to wall scrapers, except they are used to press tape into joints between plasterboard when dry lining. Taping knives come in different sizes. The medium sized knife has a 150mm (6in) blade and is used to apply the first coat of jointing compound and to bed the tape into the joint. A taping knife with a 300mm (12in) blade is used to apply the final coat of jointing compound over the jointing tape. |