MDF and HDF

In short

1. 01MDF is a board made of wood fibres and glue. It has the same density through its whole thickness, so its edge can be routed and lacquered cleanly.
2. 02That is why MDF is the first choice for shaped and lacquered fronts. Foil-wrapped fronts are made on it too.
3. 03MDF is heavier than particleboard of the same thickness and, like particleboard, it holds a screw less well in the edge than in the face.
4. 04Moisture-resistant MDF handles moisture better than standard MDF, but it is not waterproof. Its edges still have to be closed.
5. 05HDF (high-density fibreboard, often called hardboard) is a thin, denser fibreboard, e.g. 3 mm. It is used for cabinet backs and drawer bottoms.
6. 06Backs are often made of HDF coloured on one side, and that side faces the inside of the cabinet.