ASTM D1746 PDFASTM 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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The reading is recorded as percentage clarity directly from the measurement unit. This standard is not included in any packages.

The difference in the two velocities shows up a birefringence. From the orientation of the molecules further conclusions regarding the material properties can be derived.

The object is viewed from the opposite side of the light source The polarized light indicates the number of fringes or rings, which astn related to the amount of stress, if light is used.

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

A specimen measuring 6. Proceed to Checkout Continue Shopping. If the document is revised or amended, you will be notified by email. Scattered — light photoelasticity: My presentations Profile Feedback Log out. The L, a, b values are noted down.

Photoelasticity Photo-elasticity is a visual technique for measuring stresses. There are following terminology to understand the colour theory. This standard is also available to be included in Standards Subscriptions.

The total transmittance light is consists of the direct transmitted and diffused components which are depending on the angular distribution of light.

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

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.

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For additional information, see Terminology E and Practice E Next, s1746 sensor is placed on the specimen surface and the gloss value is read directly from the analog or digital display. Your Alert Profile lists the documents that will asm monitored. As the voice of the U.

OPTICAL PROPERTIES.

When a photo elastic material is strained and viewed under polarized light. There is no known ISO equivalent to this standard.

Please first log in with a verified email before subscribing to alerts. The values given in parentheses are for information only. With no sample in position the unit is standardized until a reading of relative to air is obtained. Knowledge of these optical properties is needed for several reasons: All specular gloss values are based on a primary reference standard.

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. The gloss value is directly read on the instrument. We have no amendments or corrections for this standard. Although generally applicable to any translucent or transparent material, it is principally intended for use with nominally clear and colorless thin sheeting. 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.

We think you have liked this presentation. 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. If the document is revised or amended, you will be notified by email.

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The values given in parentheses are for information only. To make this website work, we log user data and share it with processors. The specimen is placed in the specimen holder. Surface test areas shall be free from abrasion and warpage.

Another Polaroid plate, the analyzer, follows, being rotated with respect to the polarizer. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.

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Standard Test Method for Transparency of Plastic Sheeting

You may delete a document from your Alert Profile at any time. You can r1746 and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Stress optical sensitivity is define as the ability of some materials to exhibit double refraction of light when placed under stress.

The beam is blocked completely with a piece of block flet of paper. Proceed to Checkout Continue Shopping. Its measured by quantity of light deviates by more than 2. Auth with social network: Link to Active This link will always route to the current Active version of the standard.

The two essential elements of visual colour evaluation are: