ARCHIVAL（永久保存特性）：
或亦指稱無酸性。材質為 不起化學變化、不發黃、不硬化、不老化，具透氣性、濕氣不積存，不產生黏性，材質具永久保存之特性。This non-technical term suggests that a material is safe for long term storage and does not contain any chemicals that could adversely affect a collection. The phrase is not quantifiable or standardized, and therefore should not be considered, independently, as a guarantee of acceptable storage criteria.

Acid-Free(無酸性)or pH-Neutral(中性)：
就紙質而言，不含木質素、不含硫磺物、不含回收紙漿、為純淨紙漿 、呈中性或包含經3%~5%弱鹼性之緩衝劑處理。pH值在7以上的材料稱為無酸，無酸性材料可分為有緩衝劑(buffered) 或無緩衝劑(unbuffered)二種，緩衝劑一般會提高材料的pH值到8以上，無緩衝劑的材料則屬中性。Materials with a pH of 7.0 or higher are considered acid-free. Acid-free materials can be either buffered or unbuffered. Buffering agents typically raise the pH of a material to 8.0 or higher. Unbuffered materials can become acidic over time by the absorbtion of acids from the environment.

Buffer(緩衝劑)or Unbuffer(無緩衝劑)：
碳酸鈣是專業保存中一種合宜的緩衝劑，用在造紙過程，加入紙漿中以中和酸性，幫助抵消環境中的酸性物質，防止這些酸來損壞收藏品。因為擔心緩衝劑對蛋白質的影響，無緩衝劑的材料常用來保存動物性的製品如羊毛、皮革、絲和其他含蛋白質的紡織品及特殊紙張(如藍圖)、或者相紙，有緩衝劑的材料則用來保存棉、麻類等非蛋白質製品和一般的紙製品。Buffering: Paper and paperboard products are divided between buffered and unbuffered. Calcium carbonate is the preferred buffering agent of preservation professionals. The buffering agent helps neutralize acids in the environment and help to prevent those acids from attacking your collections. Because of concerns over the affect of buffering agents on certain animal bye products such as wool, leather and silk, unbuffered paper and paperboards are often preferred for storing these materials as well as certain rare photographic collections. Note: Unbuffered materials can absorb acids from the environment and can, eventually become acidic themselves.

Calcium Carbonate (碳酸鈣):

是專業保存中一種合宜的緩衝劑，用在造紙過程，加入紙漿中以中和酸性，幫助抵消環境中的酸性物質，防止這些酸來損壞收藏品。Calcium Carbonate: The preferred buffering agent of preservation professionals, Calcium Carbonate is added to paper pulp during the paper making process in order to neutralize acids. It's prescence in folders, boxes, and other enclosures helps ensure that acids in the environment are neutralized.

Lignin(木質素) or Lignin-free(不含木質素)：
木質素是植物及紙漿中自然存在的物質，被認定會破壞紙張品質，若在造紙過程中移除，則製作高品質紙張。Lignin (Lignin-Free): Lignin is a naturally occuring substance found in plants and wood pulp. Lignin is thought to contribute to the early degradation of paper and is often removed during the pulping process to create higher grade paper.

Archival Polyester(多元酯/或稱聚酯)：
MylarD 是最早使用保存用透明聚酯的廠牌，最近已停產，另一種多樣且品質相同的聚酯 Melinex 仍由美國知名之塑化公司所生產。University Products 以此最高品質的多元酯來製作各式的聚酯材料附件，可直接接觸包裝作品器物之用。聚酯仍被認為是塑膠類中最高等級之永久保存材料。Archival Polyester: Mylar D, long recognized as the premier brand of clear polyester for preservation purposes, was recently discontinued by the manufacturer, and replaced it with Melinex 516 which is the highest grades of polyester in creating it's variety of polyester enclosures.

Archival Polypropylene(聚丙烯)/ Archival Polyethylene(聚乙烯):
高品質之聚丙烯和聚乙烯，和多元酯相同，為永久保存之塑膠類，並廣被保存界做為包裝材料之應用，具不變質、不起化學變化之特性。國外將此材質應用於保存產品製作上，發泡作為無酸泡棉，運用在存放或運送包裝上，為許多專家所建議使用，是為良好之防護隔離材料。High-grade 高等級之聚丙烯和聚乙烯，絕不能含任何塑膠回收材料，且製作過程嚴謹並經測試，才能認定為 Archival 等級，作為博物館保存之用。

Polyvinyl Chloride (PVC) 聚氯乙烯:

為一種塑膠材質，當其老化時會散發出有害之鹽酸，與其接觸之物品會造成傷害，同時PVC為異味十分強烈之塑膠材料。This is a plastic that can emit damaging hydrochloric acids as it degrades, causing damage to materials stored within. PVC often emits a strong odor such as that given off by a new plastic shower curtain.
Corrugated Board(瓦楞紙板)：
此紙板一般由三部分組成：包括外部及內部的平坦襯裡和黏著在襯裡中的波狀媒介物，此結構使瓦楞紙板有極佳的硬度及延展性，以至於有緩衝的特性。E-Flute較薄，但非常強韌且不容易壓壞，B-Flute 較厚，有更好的延展性，但較難抵抗擠壓且較佔空間。

Photo Activity Test (P.A.T. 影像保存測試):
為國際性之標準認定，由獨立的 Image Permanence Institute (影像永久性研究協會)所測試。一個加速老化的過程，可預測附件與相片間的影響，也可判定可能的影響成分，如黏著物或墨水。通過此測試之產品，即符合 American National Standards Institute (ANSI IT9.16)，具有不影響作品影像、或延長保存年限之特性。多數 University Products 的產品已通過此測試。PAT (Photo Activity Test): The PAT is an accelerated aging test that predicts the interaction between enclosures and photographic images and can be used to determine possible photographic activity caused by components of those enclosures including adhesives, inks.

Creating Keepsakes(CKOK)Approved:
美國針對手工紀念品創作所使用產品，在材料品質、使用安全、無毒無味、長久保存性所給予的認證，多數 Pioneer Albums 的產品皆已通過此測試。