Bristol board

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Bristol board (also referred to as Bristol paper ) is a heavyweight paper used for technical drawing, illustration, and other two-dimensional art forms. Common sizes include 22.5″ × 28.5″ (572 × 724 mm) and its bulk thickness is .006 inches (0.15 mm) or higher^[1] and A4, A3, A2 and A1^[2][3]. Bristol board may be rated by the number of plies it contains or, in Europe, by its 'gsm (Grams per square metre) of 220 to 250.

Bristol board provides two working surfaces, front and back. This quality separates it from illustration board, which has only a front working surface. The surface texture can vary for different applications, including a smooth plate finish and a medium vellum. Artists working with friction-based media, such as crayon, chalks, or charcoal would use a rougher texture. Smooth finishes are generally more suited to other types of media, such as inks.

Bristol paper is also used for paperback book or catalog covers, file folders, tags, and tickets. Engravers or Wedding bristol paper may be used for formal engraved wedding invitations.

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