A term used to describe adhesives, papers, matboards and other framing supplies that have no acid in them. Acid-free materials should be used when framing works of art on paper. Matboards, mounting boards, tapes, envelopes and other framing materials all are available in acid-free varieties. Some have been chemically treated to remove impurities; others, such as those made of 100 percent pure cotton rag, never contained acid and are generally the best choice for framing fine art.
A term used to describe paper materials with a 7 pH A double-sided tape used to stick mat boards and other materials together. Usually used with an applicator or "ATG gun." or very close to 7 pH. Acid-free materials are more permanent and less likely to discolor over time. The term archival or conservation quality more accurately describes true acid-free conservation quality mat board.
Paper which is made with alkaline sizing and filler instead of acidic sizing. Paper lasts more than four times as long as paper sized with acid (which breaks down in 40-50 years). Just because a paper is acid-free does not mean it is pH neutral.
A popular and loosely applied term referring to matting, framing, and storage materials having at the time of their manufacture a neutral pH; sometimes used inaccurately as a synonym for alkaline or buffered.
Free of a lifetime of drug addiction. Actually, this refers to the acid content of a surface. Items that are painted on acid free surfaces will last the longest. Items painted on other surfaces may last a long time, or they may not. When framing any painting item, always try to use an acid free matting. This includes framing an item that is not acid-free. This will aid in the life extension of the painting. In the least it will prevent discoloration.
Acid-free materials have a pH of 7.0 or higher. Such materials may be produced from any cellulose fiber source including cotton and wood, if measures are taken during manufacture to eliminate active acid from the pulp.
The term used to describe specially manufactured materials that do not contain acids that cause deterioration.
Free of chemicals that harm photos in scrapbook projects. Generally, materials whose pH is over 7.0 are considered acid-free. ALL materials used in scrapbook pages should be acid-free unless you want them to dissolve before the next generation's eyes.
Acid, which (in art materials) is primarily found in products derived from wood, It can be damaging to artwork, so there is a big emphasis now on using acid-free materials. Some materials are naturally acid free, like paper made from cotton; others are treated to be acid free, like paper made from wood pulp. The former is archival (see), the latter is not (and because, some claim, it can become acidic again someday). All of my materials are naturally acid-free, with two exceptions; masonite and foam core. (See both).
Products are considered acid-free if the PH level is 7.0 or higher. Materials with a lower PH level will break down over time and cause deterioration.
In principle, papers are acid-free if they contain no free acid and have a pH value of 7.0 or greater. In practice, papermakers consider a paper having a pH value of 6.0 or greater to be acid-free. [1
paper with a neutral pH balance (7.0).
A designation for paper and paper-based materials with a pH value of 7 or greater (based on an acidity-alkali scale of 0 to 14). Using acid-free matboards, backings and printmaking paper prevents acid burns (yellowish-brown burn lines) and discoloration from appearing on your artwork over time.
A material with a neutral pH level.
Acid burns (yellow-brown burns) appear on artworks over time if materials with acids are used to mat or mount works. Meter uses acid-free materials for all matting.
Acidic paper or board deteriorates quickly and also adversely affects material with which it is in contact. This results in acid burn, matt burn, mount burn or mount staining; all terms for a brownish discolouration that appears on the print over time. The use of “acid free†framing materials reduces the likelihood of this.
Paper that is free from any acid content or other substances likely to have a detrimental effect on the paper or its ability to last over time (see pH).
Acid is a chemical that causes photographs to yellow and degrade over time. Acid-free means that a product does not contain acid.
Materials that are free from acidic compounds - have a pH of 7.0 - and do not emit harmful gases that are detrimental to the artefacts. pH is a measure of acidity or alkalinity.
Non-acidic material considered essential for the longevity of documents and their enclosures.
Refers to paper and other items that do not contain acids. Acids can cause paper to discolor, become inflexible, and eventually turn brittle over time. Acid can also destroy photographs or various other elements if it comes in contact with them.
Paper that doesn't contain acid....what? More technical, paper that has a pH of 7 or higher.
Any paper product that has a neutral pH (about 8.5)
This term is used widely and has a number of definitions: a) Acid-free can mean free of acids and free of materials that will break down to produce acids. b) It can also mean free of acids and free of materials that will break down to produce acids, and containing alkaline buffers to neutralise acids. Both these definitions would be acceptable to most conservators. Some manufacturers use acid-free to mean free of acids at the time of manufacture. In this case, there is no guarantee that the materials are of good quality. When asking for acid-free materials, try to find out more about the manufacturer's specification. To minimise risk, buy from a reputable supplier of conservation materials.
Materials that have a pH of 7.0 or higher.
The chemical characteristic of having a Ph of 7.0 or greater. The Archives uses acid-free paper, file folders, and boxes for preservation of permanent records. See also archives box.
Acid can deteriorate and age photos and paper much faster. Use acid-free materials to protect your projects.
A vague term, referring to a material with a pH of 7 or higher. Sometimes used incorrectly as a synonym for alkaline or buffered material. Some acidic materials are chemically neutralized with the addition of alkaline products; other materials are processed to remove the acid-producing elements. (Acid-free materials may become acidic over time due to residual chlorine from bleaching, aluminum sulfate from sizing or atmospheric pollutants.)
a material tested to have a pH of 7 or above indicating that the material contains no mobile or available acid ions for chemical reactions. Scrapbook implications: This does not imply the material is long lasting or scrapbook safe.
Acid-free papers are manufactured in an alka-line environment, which prevents the internal chemical deterioration of the paper over time. The addition of calcium carbonate as a buffer also makes the paper resistant to the effects of an external acidic environment.