Made from a piece of flat fabric a Roman blind has a lining or black out lining attached to the back of the fabric to form a sealed pocket, s
imilar to an envelope,
which has pull cords attached for raising and lowering the envelope of fabrics.
When raised the roman blind automatically folds and stacks on top of itself, creating a series of neat horizontal folds.
When closed, lowered, the fabric becomes flat again to entirely cover the window.
The folds, or pleats, are made by the insertion of slim wooden, metal or plastic rods, known as dowels,
that fit into channels,
or they can be made by tapes which are stitched horizontally across the back of the fabric at equidistant intervals.