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Leather sofa

A leather sofa is usually positioned in a living room of a house, and a user uses the sofa to rest in a comfortable and convenient manner. A typical sofa includes a deck or seating surface for supporting a seated occupant, a backrest that is attached to the rear edge of the deck and rises upwardly therefrom, and arms attached to the lateral edges of the deck. The sofa comprises a seat part on which the user sits, a back part on which the user leans against, arm parts, a frame and leg parts. An upholstered sofa is constructed by first forming an internal frame (usually made of wood) that provides the general shape of the sofa. The frame includes the underlying portions of the deck, backrest, and arms. A deck fabric is stretched across the deck to provide support for seating, and in some instances, springs or other resilient members will be positioned below the deck fabric. This frame is then covered with upholstery that is typically tacked or stapled to the frame, with separate pieces of upholstery being attached for each arm and for the back and deck. For elegant appearances and agreeable touch, a cover or sheet is used to cover the back part and/or the seat part. The cover is usually made of synthetic fiber, leather artificial or natural, and the like. Cushions are typically added to cover the backrest and deck; these cushions may be removable or permanently attached. For leather, and in particular for a leather sofa, a high degree of similitude in appearance is sought between the pieces forming each seat back, between the pieces forming each seat cushion, between the seat backs, between the seat cushions, and between each seat back and each corresponding lumbar support cushion. Artificial leather used as a leather substitute in recent years has become popular among consumers due to its features such as lightness and ease of care, and it has come into wide use in the fields of clothing, general materials, sports, etc.

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