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Results: 31

• Term
  Definition
• AbrasionDamage resulting in a loss to the surface caused by friction such as rubbing or scraping.
• Acid BurnThis occurs when artwork is matted and framed using materials that are not conservation quality (acid-free). Acid burn presents as a yellow or brown discoloration on the sheet.
• Acid MigrationThe movement of acid from an acidic material to material of lesser pH or no acidity, either from direct contact or through exposure to acidic vapors in the surrounding environment.
• AcidicA state in which the pH is less than pH7. Pure cellulose is initially slightly acidic, but on exposure to light, oxygen, pollutant gasses, and acidic materials in its environment, its pH can decrease, thus increasing in acidity, resulting in degradation of the sheet.
• AcrylicOften known as the brand name "Plexiglas" , it is a clear plastic glazing used for oversized artwork , or for artwork that is shipped, or often handled, when glass is not an option.
• Acrylic FacemountThe application of an optically clear adhesive directly to the face of a print and adhering it to a sheet of acrylic. The print is then backed with a rigid substrate such as dibond. A cleat is installed on the back for hanging, which then creates a frameless floating appearance of the(...)
• Acrylic GessoA mixture of calcium carbonate, white pigment and an acrylic binder. Coating a canvas with this substance prior to painting with acrylics will improve the longevity of the artwork and canvas support.
• AcryliteA trademark name for clear acrylic glazing.
• Actual Cash ValueThe Replacement Value of an item minus depreciation. For items to which depreciation is not appropriately applied (such as antiques, collectibles, and fine art, etc.), Actual Cash Value is equivalent to Fair Market Value.
• AdhesiveA synthetic, or organic agent used to join two materials.
• AgateA tool used burnish gold leaf in the final stage of water gilding to create a bright reflective finish.
• Aged MirrorThe process of either application of altering a metal amalgam on glass to create an antique like reflection, or application of a metal amalgam on a specialty glass to create a artisanal reflection.
• Albumen PrintA photographic print ppopular in the 2nd half of the 19th centruy that involved coating a sheet of paper paper with albumen (egg white) and then silver nitrate. Unlike daguerreotypes, ambrotypes and tin types, these prints involved using a negative, so that multiple prints could be produced(...)
• AlkalineHaving a pH greater than 7.
• AllowanceTypically an 1/8" extra space in the widths and lengths of a frame to ensure that all of the housed components (the artwork, matting, mounting boards, backing and glazing) will properly fit. The additional space accommodates the potential expansion and contraction of hygroscopic materials as(...)
• Aluminum FramePreferred for it's durability, light weight and economical attributes, aluminum frames are frequently purchased as sectional frames, in custom lengths, and can also be welded and custom finished.
• AmbrotypeDeveloped in the early 1850s, it is an early form of photography that produced a negative image on a coated piece of glass. The glass was then backed with a dark coating or background to create the positive image. The images are often housed in a small decorative case. Ambrotypes were less(...)
• Andre Charles BoulleA French furniture maker that lived from 1642-1732. He was known for his elaborate designs that featured scrolling inlaid designs in brass, tortoise shell and exotic wood.
• AnoxicComplete depletion of oxygen.
• AnthemionPopular motif used in the last 18th and early 19th century, it has the stylized appearance of a palm frond. Also referred as a palmette.
• Anti-reflective(AR) Significantly reduces reflection through use of an optical coating or surface treatment, without losing clarity.
• AntiqueAn item that is over 100 years old.
• AntiquingThe process of adding or imitating the appearance of age to a finish.
• AqueousWater based
• ArabesqueAn ornamental design composed of intertwined scrolling foliage.
• ArchivalA generally used term that suggests that a material or product is permanent, durable or chemically stable which can safely be used for preservation purposes. 
• Armand LeeA Chicago firm that was founded in the early 1940s by Armand Lee that specializes in custom carved, finished and gilded frames, artisanal mirrors, archival framing and services related to support the museum, interior design and interior architecture industries. www.armandlee.com
• ArrisThe high point between two grooves in a fluted design.
• Artisanal MirrorThe process of either application of altering a metal amalgam on glass to create an antique like reflection, or application of a metal amalgam on a specialty glass to create a artisanal reflection.
• Arts And CraftsA movement in fine and decorative arts between 1880-1920 that focused on the value of handcraftsmanship in response to the mechanization of items resulting from the industrial revolution.
• AstragalSmall moulding used on glass or between glass panels on furniture.