ASTM D Standard Test Method for Transparency of Plastic Sheeting. Clarity – ASTM D This test method covers the measurement of the transparency of plastic sheeting. While this test may be used for any transparent material. Find the most up-to-date version of ASTM D at Engineering

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ASTM D – 15 – Standard Test Method for Transparency of Plastic Sheeting

aetm Birefringence is referred to as stress birefringence and its contributions are: Please aatm verify your email before subscribing to alerts. Need more than one copy? If at any time an instrument fails to repeat readings of the standard to within 2 percent of the prior setting the intervening result should be rejected.

Transparency is defined as the light diffused in a small angle range within 2. Colour is measured by a particular wavelength of light reflect and producing sensation in the observer eye.

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Link to Active This link will always route to the current Active version of the standard. The object is viewed from the opposite side of the light source The polarized light indicates the number of fringes or rings, which is related to the amount of stress, if light is used.

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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.

Surface test areas shall be free from abrasion and warpage. The ring sensor mounted at the exit port of the sphere detects narow angle scattered light clarity.

A light source is illuminated. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. This standard is not included in any packages. There are two types of angle distribution. This standard is also available to be included asgm Standards Subscriptions.

The reading is recorded as percentage clarity directly from the measurement unit. Wide angle scattering Haze Narrow angle scattering Clarity or Transparency Haze is defined as the cloudy atm on the surface of specimen. If the document is revised or amended, you will be notified by email.

Stress optical sensitivity is define as the ability of some materials to exhibit double refraction of light when placed under stress. Knowledge of these optical properties is needed for several reasons: You may delete a document from your Alert Profile at any time. The difference in the two velocities shows up a birefringence. Subscription pricing is determined by: The total transmittance light is consists of the direct transmitted and diffused components which are depending on the angular distribution of light.


There are following terminology to understand the colour theory. We think you have liked this presentation.

Several additional techniques are used in conjunction with the basic photoelastic concept, which make it possible to analyze complex or unusual problems.

Results obtained by the use of this test method are greatly influenced by the design parameters of the instruments; for example, the resolution is largely determined by the angular width of the receptor aperture. The light is travelling in the direction perpendicular to the plane of the d1764.


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