In an effort to obtain a realistic mixture which could be used in FMVSS's as a test condition to qualify headlamp and windshiled washers and wipers, a mixture (dirt film) based on a formulation provided in "Composition and Removal of Automobile Windshield Films", published by the Virginia Highway Research Council (VHRC) in June 1970, was used for experimentation. A complete windshield cowl section was utilized as a test blcok employing both dark and light backgrounds to provide good contrast for the subjective criticisms and comments on the dirt film. The test dirt film was applied to both windshiled and headlamp and checked for effective wipe patterns. Approximate cost of the test dirt film used was 81found for a one-ounce dry mix. Results indicated that a dirt film similar to the VHRC film analysis can be readily produced and is a reasonable facsimile of actual dirt films.

  • Corporate Authors:

    Tracor Jitco, Incorporated

    1750 East Jefferson Street
    Rockville, MD  United States 
  • Publication Date: 1974-6

Media Info

  • Features: Figures; Tables;
  • Pagination: 60 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00080597
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Report/Paper Numbers: DOT HS-801 138 Final Rpt.
  • Contract Numbers: DOT-HS-256-3-542
  • Files: TRIS
  • Created Date: Mar 6 1975 12:00AM