1、American National Standardfor Photography (Processing) -Roll and Dental Films Requirements for Film Clips and HangersANSI/I3A IT4.23-2001Revision and redesignation ofANSI/NAPM IT4.23-1996Approved November 8, 2001 Secretariat: International Imaging Industry Association, Inc. (I3A)Page 1 of 2 pagesAn
2、American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American NationalStandard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an American National Stan-dard does not in any respect pr
3、eclude anyone, whether he has approved the standard or not, from manufacturing, marketing, purchasing, orusing products, processes, or procedures not conforming to the standard. American National Standards are subject to periodic review andusers are cautioned to obtain the latest editions.The Americ
4、an National Standards Institute does not develop standards and will in no circumstances give an interpretation of any AmericanNational Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in thename of the American National Stand
5、ards Institute.CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American NationalStandards Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date ofapproval. Purchasers
6、 of American National Standards may receive current information on all standards by calling or writing the AmericanNational Standards Institute.Copyright 2002 by American National Standards Institute, 25 West 43rd Street, 4th Floor, New York, NY 10036ANSI/I3AIT4.23-20011 ScopeThis standard specifies
7、 requirements for film clips and hangers used to hold photographic films and dental radiographic films during processing.2 Normative referenceThe following standard contains provisions which, through reference in this text, constitute provisions of this American National Standard. At the time of pub
8、lication, the edition indicated was valid. All standards and publications are subject to revision and parties to agreements based on this American National Stan-dard are encouraged to investigate the possibility of applying the most recent edition of the standard listed below. Members of IEC and ISO
9、 maintain registers of currently valid International Standards.ISO 732:2000, Photography - 120-size and 220-size films - Dimensions3 Term and definitionFor the purpose of this standard, the following term and definition applies.3.1 bite: Distance from the edge of the film to the point at which the t
10、eeth of the clip or hanger engage it; also, the distance between the film edge and the maximum projection beyond the teeth of any part of the clip or hanger that can touch the film.ANSI/I3A IT4.23-2001Page 2 of 2 pages4 Requirements4.1 Clips1)and hangers1) used to hold photographic films and dental
11、radiographic films during processing should fasten securely in order to retain the film safely during the necessary manipulations. 4.2 The bite of the film clips and hangers should not enter the picture area.4.3 In accordance with ISO 732, a minimum space of 15 mm at each end of the film strip shall
12、 be reserved for the use of clips and hangers in processing amateur roll films.Since the free margin on sheet films and pack films is considerably less than 15 mm, use of film clips is not recom-mended.Since films for dental radiography have no clear margins, only film clips and hangers having the l
13、east possible bite should be used in order to protect the diagnostic field from any harm that may be caused by the clip or hanger.4.4 Based on considerations given in 4.3, the recognized maximum bite dimension in millimeters is as follows:Maximum Bite of Film Clip or Hanger (mm)Roll film processing
14、15.0Dental film processing 3.01)Available from RINN, 1212 Abbott Drive, Elgin, IL 60120 or Eastman Kodak Company, 343 State Street, Rochester, NY 14650.This information is given for the convenience of the users of this standard and does not constitute an endorsement by I3A or ANSIof these suppliers.
