WebChemicals prohibited for use in skin care. (a) Unbuffered alpha-hydroxy acids at concentrations greater than 15 percent; (b) Buffered concentrations of alpha-hydroxy acids of 10 to 30 percent where pH is less than 3; (c) Any concentration or formulation of alpha-hydroxy acids greater than 30 percent; (d) Any concentration or formulation of ... WebMatboard is made from wood pulp or cotton fibers. Both are primarily cellulose: long, repeating chains of sugar molecules. Wood pulp also contains significant por-tions of branching hemi-cellulose and lignin, a group of compounds which give strength to wood. Lignin can degrade and produce acids or peroxides which are destructive to paper.

Archival File Folders - Acid Free Document Storage

WebSleeves should be made of unbuffered, high alpha cellulose content paper. Ideally this sleeve should be seamless and have no adhesive, although a side seam may be acceptable. The porous nature of paper allows the degradation products to escape from the enclosure, unlike a plastic enclosure which traps those harmful products and accelerates … WebCellulose fibers such as cotton, flax, linen and jute, as well plant-based specimens, can be stored in buffered material. Storing cellulose artifacts in buffered materials will protect … sth3 connectwell

Hollinger Unbuffered Folder Stock Carr McLean

WebUnbuffered four flap enclosures are an excellent choice for the long term storage of standard negative film, glass plate negatives, prints and more. The enclosures are … Webnon-fading file folder labels in bopp polypropylene, clear, colors and metallic for dymo labelwriter 30327 30576 WebUnbuffered white 10 pt. stock is acid and lignin-free (pH 7.0-7.5) and made of virgin high alpha cellulose material. Contains no buffering agents that might react negatively with … sth3000/20