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ASTM F548-81(1994)e1

(Test Method)

Standard Test Method for Intensity of Scratches on Aerospace Transparent Plastics

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
Current Stage
Ref Project

Relations

Replaced By
ASTM F548-01 - Standard Test Method for Intensity of Scratches on Aerospace Transparent Plastics
Effective Date
10-Apr-2001
Referred By
ASTM F790-23 - Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
Effective Date
10-Apr-2001

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ASTM F548-81(1994)e1 - Standard Test Method for Intensity of Scratches on Aerospace Transparent PlasticsASTM F548-81(1994)e1 - Standard Test Method for Intensity of Scratches on Aerospace Transparent Plastics
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ASTM F548-81(1994)e1 - Standard Test Method for Intensity of Scratches on Aerospace Transparent Plastics
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Standards Content (Sample)


NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: F 548 – 81 (Reapproved 1994)
Standard Test Method for
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.
e NOTE—Section 9 was added editorially in June 1994.
1. Scope plate with eight scratches of graded intensity on the inside
plastic surface. The lightest scratch is identified as F 548-11
1.1 This test method covers the visual inspection of shallow
and the heaviest as F 548-18.
or superficial scratches on the surface of aerospace transparent
plastic materials.
5. Procedure
1.2 This standard does not purport to address all of the
5.1 Place the part in a suitable inspection position. This may
safety concerns, if any, associated with its use. It is the
be horizontal on a padded table, vertical against a neutral
responsibility of the user of this standard to establish appro-
background, or at an angle. The scratched surface shall be
priate safety and health practices and determine the applica-
toward the observer. The light level shall be a minimum of 80
bility of regulatory limitations prior to use.
lm. Either natural or artificial light may be used. Place the
2. Summary of Test Method scratch in the visual comparison standard beside and parallel to
the scratch on the plastic material. Rotate the part or viewing
2.1 A visual comparison is made between a set of graded
angle to get the best definition of the scratch. Disregarding the
scratch standards and the scratch on the plastic material to
length of the scratch on the plastic material and on the
determine the relative intensity of the scratch.
standard, select and record the highest standard scratch that
3. Significance and Use
most clearly matches the appearance of the scratch on the
plastic material. Measure and record the length of the scratch to
3.1 Scratches exist on all transparent plastic surfaces. Usu-
the nearest 1 mm (0.04 in.).
ally they are very fine scratches from cleaning operations that
are not visible when looking through the plastic. Deeper
6. Interpretation
scratches may result from careless cleaning or handling. While
6.1 Customer specifications for transparent plastic materials
these may not be deep enough to affect the structural integrity
and parts may detail allowable frequency, location, length, and
of the part, their appearance in certain locations may be
standard number f
...

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