Also called varnish. A type of paint. A general term for oil varnish, volatile varnish, etc. Oil varnish is made by heating and melting resin with drying oil, adding a dryer (desiccant), and dissolving it in a solvent such as turpentine or mineral spirits. Volatile varnish (also called spirit varnish) is made by dissolving resin in a volatile solvent, and those that use alcohol as the solvent are called alcohol varnish (alcohol varnish). Resins used include natural resins such as shellac, copal, and dammar, and synthetic resins such as phenol resin and alkyd resin. Alcohol varnish that uses shellac is the most common and is called shellac varnish (lac varnish). Varnish is generally a light yellow to dark brown, transparent or cloudy liquid, with different viscosities depending on the application. It dries quickly, with alcohol varnish hardening and drying in 10 to 20 minutes, volatile varnish in 20 to 60 minutes, and oil varnish in 1 to 12 hours. The coating is highly glossy, hard, water-resistant, acid- and alkali-resistant, and electrically insulating, and is widely used for painting furniture, buildings, vehicles, ships, etc. → Related topics Enamel paint | Synthetic resin paint | Copal | Sick house syndrome | Damar | Binder | Paint Source : Heibonsha Encyclopedia About MyPedia Information |
ニスとも。塗料の一種。油ワニス,揮発性ワニスなどの総称。油ワニスは樹脂を乾性油と加熱溶融しドライヤー(乾燥剤)を加えてテレビン油,ミネラルスピリットなどの溶剤に溶かしたもの。揮発性ワニス(スピリットワニスとも)は樹脂を揮発性溶剤に溶かしたもので,溶剤にアルコールを用いたものは特に酒精ワニス(アルコールワニスとも)という。樹脂としてはセラック,コーパル,ダンマルなどの天然樹脂,フェノール樹脂,アルキド樹脂などの合成樹脂が用いられる。セラックを用いた酒精ワニスは最も一般的なものでセラックニス(ラックニス)と呼ばれる。ワニスは一般に淡黄〜暗褐色,透明または濁った液体で,用途により粘度が異なる。乾燥が速く,酒精ワニスは10〜20分,揮発性ワニスは20〜60分,油ワニスは1〜12時間で硬化乾燥する。塗膜は光沢に富み,硬度が高く,耐水性,耐酸・アルカリ性,電気絶縁性がすぐれ,家具,建築物,車両,船舶などの塗装に広く用いられる。 →関連項目エナメルペイント|合成樹脂塗料|コーパル|シックハウス症候群|ダマール|展色剤|塗料 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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