ASTM D1746 PDF

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 – 09 Standard Test Method for Transparency of Plastic Sheeting

Transparency is defined as the light diffused in a small angle range within 2. There is astk known ISO equivalent to this standard. 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. Standards Subsctiption may be the perfect solution.

For additional information, see Terminology E and Practice E It is a fundamental property used for control the purity of the product and for optical parts design.

From the orientation of the molecules further conclusions regarding the material properties can be derived.

OPTICAL PROPERTIES. – ppt video online download

Surface test areas shall be free from abrasion and warpage. Proceed to Checkout Continue Shopping. The L, a, b values are noted down.

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Plastic Optical Testing

Link to Active This link will always route to the current Active version of the standard. If a calibrated standard is to be used, it is inserted in the specimen holder, and the instrument brought to balance upon the value assigned to the standard. Proper intensity of light must be present.

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Need more than one copy? Share buttons are a little bit lower. Add to Alert PDF. You may delete d17746 document from your Alert Profile at any time. Since the refractive indexes nx and ny indirections x and y of the stressed polymer are different, the wavelengths of the two wave components tx and ty are also different, therefore the two waves will be out of phase when leaving. Already Subscribed to this document. Its measured by quantity of light deviates by more than 2.

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Standard Test Method for Transparency of Plastic Sheeting

The reading is recorded as percentage clarity directly from the measurement unit. Subscription pricing is determined by: Already Subscribed to this document. Please first log in with a verified email before subscribing wstm alerts. We have no amendments or corrections for this standard.

You can download and open this file to your own computer but DRM prevents opening this file on another e1746, including a networked server. Proceed to Checkout Continue Shopping.

Birefringence is referred to as stress birefringence and its contributions are: Although generally applicable to any translucent or transparent material, it is principally intended for use with nominally clear and colorless thin sheeting. You may delete a document from your Alert Profile at any time.

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This standard is also available to be included in Standards Subscriptions. The difference in the two velocities shows up a birefringence. This standard is not included in any packages. There are two types of angle distribution.

As the voice of the U. Subscription pricing is determined by: To make this website work, we log user data and share it with processors. Stress optical sensitivity is define as the ability of some materials to exhibit double satm of light when placed under stress. The optical properties of a substance mainly depends on the Molecular structure, morphological characteristics type and amount of additives, processing conditions and post processing operations.

If the document is revised or amended, you will be notified by email. When a photo elastic material is strained and viewed under polarized light. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The specimen is placed in the specimen holder. With no sample in position the unit is qstm until a reading of relative to air is obtained. The variables of appearance include glossiness or matness, opacity or transparency, smoothness or roughness, and metallic reflection or diffusion surfaces of parts of its rays.

A relatively flat, colored specimen is placed in a specimen holder.