Conservation Science

206 Chapter 8 Preventive conservation involves controlling the environments in which objects are placed during storage and displ ...

Plastics 207 to create millions of microscopic pores between the carbon atoms, giving a huge surface area density of 300–2000 m^ ...

208 Chapter 8 trapped by the zeolite and unable to come into contact with cellulose acetate, the risk of autocatalysis is reduce ...

Plastics 209 This is rather contra-intuitive. Museum conservators and designers are usually advised either to improve ventilatio ...

210 Chapter 8 that the long-term effectiveness of today’s treatments may be accurately known. A wider range of adhesives, filler ...

Plastics 211 International Council of Museums-Committee for Conservation, Modern Materials Working Group, http://www.icom-cc.org ...

Chapter 9 Stone ROBERT INKPEN^1 AND ERIC MAY^2 (^1) Department of Geography, University of Portsmouth, Hampshire, PO1 3HE, UK (^ ...

Stone 213 the relative contribution of different factors to the development of distinct types and patterns of degradation. Viewi ...

214 Chapter 9 parts of their structures. Pyroxenes, for example, are long-chain minerals and experience chemical weathering alon ...

Metamorphic rocks are either igneous or sedimentary rocks that have been altered by the action of pressure or heat. Marble is an ...

216 Chapter 9 Crystal lattice breakdown refers to the removal of ions from the minerals of which the stone is composed. Removal ...

Stone 217 irreversible change in the dimensions of the stone. This type of behaviour occurs at every scale. The idea of stress b ...

218 Chapter 9 alter the pattern from place to place as, for example, industry is regulated to dif- ferent parts of the urban sys ...

Stone 219 2.4 Limestone Weathering in an Urban Environment: Illustration of the Interaction of the Three Factors Degradation can ...

220 Chapter 9 low as pH 3.5 from a combination of sulfuric (derived from sulfur dioxide) and nitric acid (derived from nitrogen ...

Stone 221 to be at different angles and so runoff velocity will vary. Even for a strong acid, if there is little time to react, ...

222 Chapter 9 Surface etching Formation of depression Formation of hardened crusted Extreme flaking Black crust Crust regenerate ...

Stone 223 operates in one direction. Without an understanding of how the relationship works, this type of error is possible. Sec ...

be on the surface or inside stone, as endolithic communities. In some cir- cumstances their long-term surface growth establishes ...

Stone 225 3.1 Light-dependent Microbial Growths Algaeare photosynthetic and develop on stone when light is present. Algae often ...