1、Designation:E271111Standard Guide forPreservation of Liquid Soaked Documents1This standard is issued under the fixed designation E2711;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses
2、indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide provides procedures that should be used byforensic document examiners(Guide E444)for the preserva-tion of liquid soaked documents.1.2 These procedures
3、 include evaluation of the sufficiencyof the material requiring preservation.1.3 The particular methods employed in a given case willdepend upon the nature of the material requiring preservation.1.4 This guide does not cover all procedures to preserveunusual or uncommon liquid soaked documents.Consu
4、ltationwith a document conservationist,archivist,or related materialexpert,as well as reference materials,may be necessary.1.5 This guide does not replace knowledge,skill,ability,experience,education,or training(Guide E2388)and should beused in conjunction with professional judgment.1.6 This standar
5、d does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Sta
6、ndards:2E444 Guide for Scope of Work of Forensic DocumentExaminersE1732 Terminology Relating to Forensic ScienceE2195 Terminology Relating to the Examination of Ques-tioned DocumentsE2388 Guide for Minimum Training Requirements for Fo-rensic Document ExaminersE2710 Guide for Preservation of Charred
7、Documents3.Terminology3.1 Definitions:3.1.1 bone folder,na piece of shaped bone or othermaterial,such as plastic or Teflon,typically used by bookbind-ers to crease paper and to separate pieces of paper that are stucktogether.3.1.2 parylene processing,nthe deposition of a clearpolymer coating on a do
8、cument(s)within a vacuum chamber tostrengthen and stabilize the document(s).3.1.3 polyester film encapsulation,na process whereby adocument is sealed between two sheets of polyester film topreserve,stabilize,and facilitate handling.3.1.4 submersion,vthe placement of a document(s)intoan appropriate l
9、iquid to facilitate cleaning,unfolding,orseparation of the document(s).4.Significance and Use4.1 The procedures outlined here are grounded in thegenerally accepted body of knowledge and experience in thefield of forensic document examination and related fields.Byfollowing these procedures,a forensic
10、 document examiner canreliably process liquid soaked documents to optimize theirpreservation.5.Interferences5.1 Items submitted may have inherent limitations thatinterfere with the procedures in this guide.Any limitationsshould be recorded.5.2 The results of prior storage,handling,testing,or pro-ces
11、sing can adversely affect the preservation of the docu-ment(s).The document(s)should be frozen or otherwiseimmobilized as soon as possible to stabilize their conditionprior to preservation.5.3 The extensive time required for some procedures andthe type of procedures chosen can conflict with investig
12、ativeneeds and other forensic examinations.Coordination with thesubmitter,experts in other forensic disciplines,and otherrelevant individuals might be warranted.6.Equipment and Requirements6.1 Appropriate light source(s)of sufficient intensity toallow fine detail to be distinguished.NOTE1Natural lig
13、ht,incandescent,LED or fluorescent sources,orfiber optic lighting systems are generally utilized.Transmitted lighting,side lighting,and vertical incident lighting have been found useful in avariety of situations.1This guide is under the jurisdiction of ASTM Committee E30 on ForensicSciences and is t
14、he direct responsibility of Subcommittee E30.90 on Executive.Current edition approved April 15,2011.Published May 2011.DOI:10.1520/E2711-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume in
15、formation,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2 Magnification sufficient to allow fine detail to be distin-guished.6.3 Picks,such as dental picks,probes,and twe
16、ezers.6.4 Atomizer.6.5 Trays,tanks,and pliable screening.6.6 Bone folder or similar device.6.7 Polyester film or other encapsulation material,as re-quired.6.8 Imaging or other equipment for recording observations,as required.6.9 Other apparatus,such as freeze dryer,book press orother suitable press,humidity chamber,laboratory oven,andchemicals,as appropriate.6.10 Sufficient time and facilities to complete all applicableprocedures.7.Procedure7.1 All applicable procedures should be performed andno