Elements of Archaeological Conservation
Format: PDF / Kindle (mobi) / ePub
Clearly laid out and fully illustrated, this is the only comprehensive book on the subject at an introductory level.
Perfect as a practical reference book for professional and students who work with excavated materials, and as an introduction for those training as archaeological conservators.
site: objects are winched up in a box of sediment Small and delicate finds of wood, rope, leather, etc. are packed in fine sediment for protection, placed individually into boxes, and then sealed before lifting (plate 3.6).11 Plaster of Paris and polysulphide rubber could probably be used to encase fragile materials and insubstantial mineralized remains before raising, especially on shallow-water sites where diving operations are less complicated. 3.1.2 Moulding in situ12 Since the lifting of
processes or stages. At the same time we can look at what happens at each stage if conservation is ignored and at cases where conservation is not necessary, that is where material does not disintegrate and where it reveals its secrets without recourse to special techniques. 1.1.1 Pre-excavation considerations Even before a site is excavated it is important to consider the conservation requirements likely in order to ensure that adequate facilities and funds are available. In the first instance
any soil left on the surface of the decayed glass. WEEPING GLASS.30 Glass which contains far too little stabilizer can deteriorate even under museum conditions. Where RH>42 per cent, the unstabilized flux can migrate to the surface, forming tears of alkali which then cause great damage to the glass. If unstable glass had been buried in constantly very dry conditions, it is just possible it might have survived to weep on excavation. 4.4.6 Stabilization 188.8.131.52 Passive Much deterioration of
sunlight or artificial heat sources. They can be marked by first painting just a small area on an inside/underside surface with diluted adhesive (section 184.108.40.206) and 156 Siliceous and related materials covering the ink with a second layer of adhesive; this makes the mark easier to take off at a later date if required. No other material, whether soft-bodied fabrics, painted/gilded ceramics, ceramics with flaking surfaces/glazes, those held together by salt crystals, etc., should be cleaned on
In normal atmospheric conditions moisture is present as water vapour, but it may condense onto a cold metal surface, or be attracted by hygroscopic compounds soiling a metal surface. Where moisture is present, corrosion processes are no longer simple chemical combinations, but involve electrochemistry. ELECTROCHEMICAL CORROSION. Electrons, negatively charged particles, are released when a metal atom forms an ion, in this case a positively charged particle called a cation. This whole process is