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Plastering Courses in Manchester - How to Plaster Index Page

How to use a Plasterers Trimming Knife

 Draper Trimming Knife

A trimming knife is used to cut the plasterboard. Knives come with either a fixed replaceable blade or the safer, retractable blade type. 

This is done by scoring the top paper surface to create a line of weakness across the board. When pressure is applied to the area behind the score, the board will break cleanly along the desired line.