places where it will get wet, like a bathroom; even laminated paper will be affected, as water bleeds in from the edges. Traditionally, abura-shōji (: "oil-shoji"), also called ama-shōji (: "rain-shoji"), used paper (generally nishi-no-uchigami, ) that was glued on with vinegar-based paste and then oiled. This made them water-resistant, so they were used where rain might reach under the eaves. Oiled-paper windows were common in Europe, as European-style shallow eaves exposed the windows to precipitation. In Japan, deep eaves were conventional, and oiled-paper windows were rare. The smooth sheet of paper covering the back of a shoji can make it difficult to grip and slide the shoji from the outside. To solve this, a single square in the frame may be papered only on the opposite side, and/or a groove may be cut in the outside of the frame (see image). This doorpull is called a hikite. While washi paper blocks wind, it does allow air to diffuse through, allowing air circulation. This is particularly important in traditional buildings, in which charcoal is burned, and damp evaporates from the ground in the crawlspace under the raised wooden floor. Ranma (transom/fanlight panels above the sliding panels and kamoi) may have openings to further encourage breezes to pass through the building. Plastic sheets and synthetic fibers Less traditionally, rigid light-diffusing panels of plastics are also used, such as approximately 2 mm-thick acrylic or polycarbonate which can be frosted or bonded to a printed film. Fiberglass-reinforced acrylic is also used. Rigid translucent panels cannot readily be spliced; one continuous sheet must usually be used per frame. Plastic panels are waterproof, and some may be used outdoors year-round. Paperlike sheets of plastic nonwoven fabrics may also be used, including polypropylene (like that used in surgical masks and other disposable clothing). A peel-and-stick film made of epoxy and white non-woven fiberglass is also used. Nonwoven sheets of composite plastic (vinyl-coated polyester) fibers are also used, and may be attached with removable fasteners rather than glue, although they are still single-use. Glass Nekoma shoji (, also called mago shoji, ) have a horizontally-sliding translucent sub-panel (or two, for Osaka nekoma shoji), which can be opened from inside to give a view outwards. Until the late 1800s, these small panels were the only use of glass in shoji; blown plate glass was expensive and available in small panes. Cheaper plate glass was introduced to Japan circa