GUIDELINES FOR THE CURATION OF GEOLOGICAL MATERIALS

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APP 3 for small jobs. Water soluble adhesives are frequently useful in "transfer techniques" in preparation used counter to organic solventladhesive solutions. COLD-SETTING ADHESIVES - WATER BASED EMULSIONS There are several advantages in using these adhesive emulsions; economy, a high solids content (ca. 50% polymer) without the high viscosity of the same polymer content in solution, a higher molecular weight polymer can be used, because of the lower viscosity, with an increase in the tensile strength of the final film, and finally the use of flammable or harmful solvents is avoided. The final film may also be highly resistant to water, but generally re-soluble in the appropriate solvent (reversibility is important), eg. acetone, methyl ethyl ketone. Most of the well known polymers are available as emulsions giving a good choice of final properties. Polyvinyl acetate; used for non-structural bonding of wood, paper, leather, cloth, metals, glass, ceramics and many plastics (not pvc, polyethylene or rubber). Milky white emulsions, clean to use, high initial tack and fairly quick setting. Strong bond, good resistance to oils and mould growth, moderate resistance to water but poor resistance to solvents. The emulsions in storage must not be allowed to freeze. Plasticized forms retain a flexibility. Emulsion slightly acidic. Samson 8100 Resimul. Samuel Jones & Co. Ltd. Resistance to water, rapid setting heavy cream emulsion. May be diluted with water. High mould resistance. Slightly acid in reaction. Wood-lok 140-0212. National Adhesives & Resins Ltd., Slough, Bucks. Slough 33494. 51% solids (wlw), non-gap filling. resistant to humid environments, and biodeterioration. Freeze-thaw stable! Cobond & Coflex. J. & G. Cox Ltd., Grogie Mills, Edinburgh 11 031- 337 622214. Marley 130. Marley Floor Tile Co. Ltd., Bath Road, Beenham, Reading. Berks. Woolhampton 2331. Clam 7. London Adhesive Co. Ltd., Maxwell Road, Borehamwood. Elstree, Herts. 01-953 2992. Spencobond 2212. The Albumenoid Products Co. Ltd. Cascore 2 VN-1. The Borden Chemical Co. (UK) Ltd., North Baddesley, Southampton, Hants. Rownhams 2131. Dufix. ICI. Ltd. Resistant to acids and alkalis. Unibond. Unibond Ltd., Glebeland Road, Camberley, Surrey. Camberley 3135. Unitimb. Unibond Ltd. Faster setting than Unibond. Evostik W. Evode Ltd.. Industrial Adhesives Div., Common Road, Stafford. Stafford 2241. Bexol 657. BXL Industrial Products Group Ltd., Manningtree. Essex. Manningtree 2401. Croid 843. Croid Ltd., Berkshire House, High Holburn, London WCl. 01-836 7777. Polystik. Croid Ltd. pH-6.5. National 233-0553. National Adhesives & Resins Ltd.
APP 4 Tufskin. Alfred Adams & Co. Ltd., Reliance Works, West Bromwich, Staffs. 021-553 0263. Aerocol4501. CIBAIGEIGY Ltd., Duxford, Cambridge. Sawston 2121. Tenaxatex W.S. 3956. Williams Adhesives Ltd., 247 Argyll Avenue, Trading Estate, Slough, Berks. Slough 24343. Plasticised emulsion used by BM(NH) Palaeo. Lab. in place of Vinamul N.9146. Vinamul 6815. Vinyl Products Ltd. but obtainable from Frank W. Joel Ltd., Oldmedow Road, Hardwick Industrial Estate, King's Lynn, Norfolk PE30 4HA. 0553 60851. 15% plasticiser content. Used in many museums, particularly the archaeology sections. Thermoplastics in solution. NB. Thermoplastics are subject to cold flow and are therefore not used as structural adhesives. In the museum they should not be used to cement weighty objects, e.g. large, heavily mineralised dinosaur limb-bones, without the aid of dowelling. Acrylic. Tensol cement no. 6. ICI Ltd. Solvent: 1-2 dichloroethane (ethylene dichloride), highly flammable, FP. 13°C. For bonding acrylic sheet, moderate strength bond, limited gap filling. *NB. May be used to repair fossil bone, where weights of no more than a few grammes are involved. In small sectional contacts, setting (solvent evaporation) is moderately rapid, handling possible in 1-15, minutes. Scrap 'perspex' (clean) may be dissolved in dichloromethane (nonflammable, but harmful), dichloroethane, or ethyl acetate (highly flammable, FP. -5°C) to provide a cheap, effective alternative to a retail product. Cellulose acetate. (R) PUK-KA Balsa cement. M. Marcel Guest Ltd., Riverside Works, Collyhurst Road, Manchester 9. 061-205-2644. For balsa wood, paper, and polystyrene. Lepage's Balsa cement. Henry C. Stephens Ltd., Britannia House, Drayton Pk., London N5. 01-226-4455. Joyplane cement. Turnbridges Ltd., 72 Longley Road, London SW17. 01-672- 658113. The cellulose esters (i.e. acetate, acetate-butyrate, caproate and nitrate), are commonly used as adhesives, setting by evaporation of their solvent. Cellulose nitrate should be avoided for museum use, due to its flammability, rapid discolouring on exposure to light (particularly sunlight) and its general instability over time. Cellulose acetate is the most commonly used as an adhesive and as the "peel material" in serial sectioning, but the acetatebutyrate does have better water and heat resistance and is compatible with a wider range of plasticises. Both of these esters have resistance to weak acids and certain solvents, oils and mould attack. Polystyrene. Transparent and colourless, good resistance to water and mould growth. Strong bonds may be obtained, but there is a tendency to brittleness and crazing. Very soluble in most of the commonly used solvents. Used for joining polystyrene parts (not expanded polystyrene), wood, cork and paper.
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A . GUIDELINES FOR THE CURATION '-
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CONTENTS Part A INTRODUCTION ACQUI
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GUIDELINES FOR CURATION OF GEOLOGI
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involved at all stages of curation
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ACQUISITION: SUMMARY AND RECOMMENDA
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environomental (i.e. site) conserva
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PRIMARY ACQUISITION: COLLECTING AND
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clearly and indelibly labelled with
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2.1.3.2. Geochemistry 2.1.3.3. Geop
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2.2.1.3. Purchase 2.2.1.4. Exchange
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2.2.2.2. Private collectors This ca
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ACQUISITION DOCUMENTATION INTRODUCT
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DOCUMENTATION OF SPECIMENS DURING P
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Against the corresponding number in
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DOCUMENTATION GENERAL INTRODUCTION
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measurements, descriptions, photogr
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Fig. 3. Cataloguing a specimen usin
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Specimen Identity Numbers may be su
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ldentn Comment Object(s) OBJECT EXA
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Cooper (1982), Mayer (1974, 1976),
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its entitlement to retain a specime
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or otherwise borrowed. Those which
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must be that in which a specimen is
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must be used. An extendible numberi
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Multiple classifications and cross-
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itself the task of describing, figu
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4.4.1.2. Minerals 4.4.1.3. Rocks ne
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4.4.2. Identity and identification
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The MDA Geology Specimen Card allow
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4.4.2.6. Status A specimen acquires
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4.4.3.3. Colour Colour is a notorio
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Regis, Charmouth; for Whitby, Saltw
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Redundant or shifting countries and
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4.4.4.3. Collection This system, al
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at tracing the history and fate of
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Of immediate concern is the questio
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other information of significance m
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y documentation, development, techn
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The movement of a specimen is an ev
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When a specimen is replaced in its
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the nature of a specimen and within
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5.4.2. The documentation of complex
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6.1.1.2. conditions of loans a lett
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description of borrowed items (incl
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ecome separated from their accompan
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paragraphs above. It should be note
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6.2.2.4. Outlineprocedure for dispo
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SPECIMEN PRESERVATION SUMMARY AND R
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3.8.2. Photographic materials 3.8.
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Archives C3.8.1. The care and maint
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protection and specific treatments,
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field. The excavation of unstable f
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to storing the broken pieces unasse
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Borates. Most alter (dehydrate) to
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strength. Dental silicone moulding
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solution of the particular mineral.
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Fig. 11. Table of materials which m
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all exterior doors and windows requ
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locks of rock, for later laboratory
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Both the nature of the geological m
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ideal (e.g. BM(NH) London; Nat. Mus
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a considerable commitment from the
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of all of these specimens in the ev
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Stony meteorites should be doubly b
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obscure the sectioned material. By
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mould, fungi or bacteria, fluorish
Page 136 and 137: 3.8.1.4. Repair 3.8.1.5. Binding Th
Page 138: The National Reprographic Centre fo
Page 141 and 142: Museum safety OCCUPATIONAL HAZARDS:
Page 143 and 144: gives regulations for the design an
Page 145 and 146: 2.1.1. Storage 2.1.2. Display While
Page 147 and 148: mineral is a minor constituent are
Page 149: appears to be the dimensions of the
Page 152 and 153: Secondary types Figured specimens C
Page 154 and 155: USES COLLECTIONS PREAMBLE In this P
Page 156 and 157: The criteria for selection of speci
Page 158 and 159: definition of a locality here is di
Page 160 and 161: museum on completion or abandonment
Page 162: Specimen-based publications Publish
Page 165 and 166: For details of palaeontological nom
Page 167 and 168: 2.4.5. Referred specimens When an a
Page 169 and 170: the visitor. Either way, it fails t
Page 171 and 172: methods but do remember the need fo
Page 173 and 174: EXHIEITIONTITLE "LOST WORLDS " UNIT
Page 175 and 176: REFERENCES AND APPENDICES
Page 177 and 178: REF 2 BRUNTON, C. H. C. 1980. The u
Page 179 and 180: REF 4 persons exposed to ionising
Page 181 and 182: REF 6 OBRUCHEV, D. V. 1964. Agnatha
Page 183 and 184: REF 8 TAYLOR, H. A. 1980. The arran
Page 185: APP 2 .Museum use. NB. These glues
Page 189 and 190: APP 6 0 Silicones and thermosetting
Page 191 and 192: APP 8 BARBOLA MODELLING PASTE Alec
Page 193 and 194: APP 10 GAUZE, cotton (B.P.B. Absorb
Page 195 and 196: APP 12 PLASTONE self-hardening mode
Page 197 and 198: APP 14 SEPARATORS and RELEASE AGENT
Page 199 and 200: APP 16 STORAGE SHELVING Bruynzeel S
Page 201 and 202: APP 18 Road, Linlithgow Bridge, Lin
Page 203 and 204: APP 20 FERRY PICKERING BOXES LTD.,
Page 205 and 206: APP 20 FERRY PICKERING BOXES LTD.,
Page 207 and 208: FERRY PICKERING BOXES LTD., 53 Mead
Page 209 and 210: APP 22 MONEY HICKS LTD, 49 Clapham
Page 211 and 212: APP 24 SOLMEDIA LTD, 31 Orford Road
Page 213 and 214: APPENDIX 3 NATIONAL SCHEME FOR GEOL
Page 215 and 216: APP 29 a resource for internal use
Page 217: 29. AVON, SOMERSET. GLOUCESTERSHIRE
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GUIDELINES FOR THE CURATION OF GEOLOGICAL MATERIALS

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