欧美日韩不卡码一区二区三区,国产精品视频免费一区二区三区,看片国产,99久久精品免费观看区一,www.chenren,男女羞羞免费视频

產品列表PRODUCTS LIST

聯系信息

  • 電話:
    189-2580-2250
  • 傳真:
    18925802250
  • 服務熱線:
    0769-82205353
首頁 > 技術與支持 > ASTM D3424-11
ASTM D3424-11
點擊次數:972 更新時間:2019-08-13

ASTM D3424-11

本頁面標準信息均來源于網絡收集,或由參與標準制定的供應商提供,只作為參考使用,為確保測試結果的準確性、節省您的時間,如需ASTM D3424-11標準詳細信息或ASTM D3424-11具體測試方法,可與我們技術人員聯系或給我們留言,我們將為您提供相關的技術支持。

 

ASTM D3424是印刷品相對日曬色牢度和耐候性評估的標準測試方法:

ASTM D3424描述了印刷品在下列情況下相對日曬色牢度和耐候性的評估程序,涉及自然光曝露測試程序或實驗室加速曝露測試程序。*近的標準版本為2011年修訂的。ASTM D3424-11

kingjo  氙燈試驗箱ASTM D3424測試方法

ASTM D3424測試方法

ASTM D3424英文介紹(節選)

Significance and se

Lightfastness or weatherability for specified periods of time is pertinent for certain types of printed matter such as magazine and book covers, posters and billboards, greeting cards and packages. Since the ability of printed matter to withstand color changes is a function of the spectral-power distribution of the light source to which it is exposed, it is important that lightfastness be assessed under conditions appropriate to the end-use application.

The accelerated procedures covered in these exposure methods provide means for the rapid evaluation of lightfastness or weatherability under laboratory conditions. Test results are useful for specification acceptance between producer and user and for quality control.

The xenon-arc lamp with an appropriate filter system exhibits a spectral-power distribution that corresponds more closely to that of daylight than the carbon-arc. In turn, accelerated tests using xenon-arc apparatus may be expected to correlate better with exposure to natural daylight than do those using carbon-arc apparatus.

To accommodate variations in light intensity among days, seasons, locations, or instruments, duration of exposure is preferably expressed as the radiant exposure in specific bandpasses rather than time. In either case, the inclusion of an appropriate control serves to minimize effects of variations in test conditions.

Color changes are not a linear function of duration of exposure. The preferred method of determining lightfastness or weatherability is to expose the prints for a number of intervals and to assess the time or radiant exposure required to obtain a specified color difference.

For a given printing ink, lightfastness and weatherability or both depend on the type of substrate, the film thickness of the print, and the area printed (solid versus screen). Therefore, it is important that the nature of the test and control specimens correspond to that expected under actual use conditions.

Note 2—Specifications D4302, D5067, and D5098 provide useful guides to the lightfastness of pigments in several types of artists' paints after 1260 MJ/m2 total window glass filtered solar radiant exposure (equivalent to about 2 or 3 months' exposure to window glass filtered solar radiation in accordance with Practice G24 at a tilt angle of 45 degrees). However, because of major differences between printing inks and artists' colors, especially in applied film thickness, it cannot be assumed that the lightfastness categories of printed ink films containing these pigments will be comparable to those indicated in the three specifications.

1. Scope

1.1 This standard describes procedures for the determination of the relative lightfastness and weatherability of printed matter under the following conditions, which involve exposure to natural daylight or accelerated procedures in the laboratory:

1.1.1 Method 1—Daylight behind window glass,

1.1.2 Method 2—Outdoor weathering,

1.1.3 Method 3—Xenon-arc apparatus with window glass filters to simulate daylight behind window glass,

1.1.4 Method 4—Xenon-arc apparatus with water spray and daylight filters to simulate outdoor weathering,

1.1.5 Method 7—Fluorescent lamp apparatus to simulate indoor fluorescent lighting in combination with window-filtered daylight.

1.1.6 Method 8—Fluorescent lamp apparatus operating with fluorescent cool white lamps to simulate indoor fluorescent lighting.

Note 1—Previous versions of this standard included Methods 5 and 6 that are based on enclosed carbon-arc exposures. These methods are described in Appendix X1. The spectral irradiance of the enclosed carbon-arc is a very poor simulation of solar radiation, window glass filtered solar radiation, or the emission of lamps used for interior lighting. In addition, enclosed carbon-arc devices are no longer readily available or commonly used.

1.2 These methods require that a suitable print or other control (reference standard) be run along with the test sample. Color changes due to conditions of exposure may be evaluated by visual examination or instrumental measurement.

1.3 These methods are applicable to prints on any flat substrate including paper, paperboard, metallic foil, metal plate, and plastic film, and are produced by any printing process including letterpress, offset lithography, flexography, gravure, and silk screen.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 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. For specific hazard statements, see Section 8.

2. Referenced Documents (purchase separately)

ASTM Standards

D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials

D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

D2616 Test Method for Evaluation of Visual Color Difference With a Gray Scale

D4302 Specification for Artists Oil, Resin-Oil, and Alkyd Paints

D4674 Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office Environments

D5067 Specification for Artists Watercolor Paints

D5098 Specification for Artists Acrylic Dispersion Paints

E284 Terminology of Appearance

E991 Practice for Color Measurement of Fluorescent Specimens sing the One-Monochromator Method

E1331 Test Method for Reflectance Factor and Color by Spectrophotometry sing Hemispherical Geometry

E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry

E1349 Test Method for Reflectance Factor and Color by Spectrophotometry sing Bidirectional (45:0 or 0:45) Geometry

G7 Practice for Atmospheric Environmental Exposure Testing of Nonmetallic Materials

G24 Practice for Conducting Exposures to Daylight Filtered Through Glass

G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that se Laboratory Light Sources

G153 Practice for Operating Enclosed Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials

G154 Practice for Operating Fluorescent Light Apparatus for V Exposure of Nonmetallic Materials

G155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials

上一篇:ASTM D3451-06

下一篇:ASTM D3105

返回列表>>

粵公網安備44190002001386號

主站蜘蛛池模板: 色综合成人丁香 | 真人视频一级毛片 | 精品久久一 | 亚洲午夜国产精品 | 国产国语一级毛片在线视频 | 欧美操日韩 | 国产精品一区二区资源 | 免费在线观看网址 | 日本国产网站 | 善良的嫂子3在线播放 | 网友自拍网 | 国产一区二卡三区四区 | 欧美日韩国产在线人成app | 国产va视频 | 国产成人精品日本亚洲网站 | 嫂子的职业电影在线观看 | 国内国语一级毛片在线视频 | 久久久全国免费视频 | 国产一区二区三区精品久久呦 | 久青草国产在线 | 啪啪激情综合 | 丁香综合五月 | 国产剧情自拍 | 国产黄色免费观看 | 久久亚洲欧美综合激情一区 | 九九热国产在线 | 国产免费一区二区三区在线观看 | 少女免费播放片 | 成人短视频在线在线观看 | 国产免费高清在线精品一区 | 99久久精品免费精品国产 | 久久久精品视频免费观看 | 四虎w345com| 国产精品成人一区二区三区 | 狠狠天天 | 男人的天堂久久香蕉国产 | 久久99久久99精品免观看麻豆 | 成人国产网站 | 你懂的免费视频 | 久久99精品久久久久久牛牛影视 | 啊v天堂网 |