The Ring Crush Test fixture is designed to carry out the ring crush test for paper and board having an average thickness up to 1000µm, for the purpose of MD ring crush, CD ring crush, liner or fair side.
The test piece of paper or board is supported in the Ring Crush Holder and subjected to edgewise compression between the platens of a crush testing machine.
A branch groove is cut from the edge to permit insertion of the test piece. One of a series of replaceable discs rests in the centre. The discs are of various diameters so that the width of the grove formed between the edge of the disc and the wall of the cylindrical hole may be varied to accommodate test pieces of various thicknesses.