ASTM F548-01

Standard Test Method for Intensity of Scratches on Aerospace Transparent Plastics

SCOPE
1.1 This test method covers the visual inspection of shallow or superficial scratches on the surface of aerospace transparent plastic materials.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Apr-2001
• ICS: 49.045 - Structure and structure elements
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.08 - Transparent Enclosures and Materials

Relations

• Replaces: ASTM F548-81(1994)e1 - Standard Test Method for Intensity of Scratches on Aerospace Transparent Plastics
• Effective Date: 10-Apr-2001
• Replaced By: ASTM F548-03 - Standard Test Method for Intensity of Scratches on Aerospace Transparent Plastics
• Effective Date: 10-Apr-2003
• Referred By: ASTM F790-23 - Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
• Effective Date: 10-Apr-2001

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 548 – 01
Standard Test Method for
1
Intensity of Scratches on Aerospace Transparent Plastics
This standard is issued under the fixed designation F 548; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
comparison standards. Adjuncts are not currently available.
1. Scope
1.1 This test method covers the visual inspection of shallow
5. Procedure
or superficial scratches on the surface of aerospace transparent
5.1 Place the part in a suitable inspection position. This may
plastic materials.
be horizontal on a padded table, vertical against a neutral
1.2 This standard does not purport to address all of the
background, or at an angle. The scratched surface shall be
safety concerns, if any, associated with its use. It is the
toward the observer. The light level shall be a minimum of 80
responsibility of the user of this standard to establish appro-
lux. Either natural or artificial light may be used. Place the
priate safety and health practices and determine the applica-
scratch in the visual comparison standard beside and parallel to
bility of regulatory limitations prior to use.
the scratch on the plastic material. Rotate the part or viewing
angle to get the best definition of the scratch. Disregarding the
2. Summary of Test Method
length of the scratch on the plastic material and on the
2.1 A visual comparison is made between a set of graded
standard, select and record the highest standard scratch that
scratch standards and the scratch on the plastic material to
most clearly matches the appearance of the scratch on the
determine the relative intensity of the scratch.
plastic material. Measure and record the length of the scratch to
the nearest 1 mm (0.04 in.).
3. Significance and Use
3.1 Scratches exist on all transparent plastic surfaces. Usu-
6. Interpretation
ally they are very fine scratches from cleaning operations that
6.1 Customer specifications for transparent plastic materials
are not visible when looking through the plastic. Deeper
and parts may detail allowable frequency, location, length, and
scratches may result from careless cleaning or handling. While
s
...