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Through and through describes a situation where an object, real or imaginary, passes completely through another object, also real or imaginary. The phrase has several common uses: ==Printmaking== An image may be through and through in the following cases: *ink or paint has penetrated to the other side *inlaying with another material, stained glass, patchwork, woodwork, linoleum, marble, etc. *carving out (e.g. wood carving), cutting out, perforation: this may concern the outside shape, shaped holes, and patterns of holes (e.g. in a punched card; also a passport may have its number perforated in the pages, to make forgery more difficult). *embroidery etc. Through and through images are more durable; they do not easily wear off. In the case that the image can be viewed from the other side, we see the mirror image, just like in the case of a transparent image, such as a drawing on a transparent sheet. A sheet with a through and through image is achiral. We can distinguish two cases: *the sheet surface with the image has no axis of symmetry parallel to the axis of rotation - the two sides are different (e.g. U on a page rotated L-R) *the sheet surface with the image has an axis of symmetry parallel to the axis of rotation - the two sides are the same (e.g. C on a page rotated L-R) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Through and through」の詳細全文を読む スポンサード リンク
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