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對于需要避光保存的樣品，我們專門設計色素樹脂涂層，而不是簡單添加染料。
聚乙烯薄膜由色素樹脂涂層，而不是印刷層。這樣就可以保護對光敏感的樣品不受損害。它是理想的藥品，調味料，口味，食品添加劑，維生素，海洋生物，和許多其他液體或固體產品的取樣裝置。由美國FDA批準用于食品接觸。
能更好的保持樣品的真實性，避免受到色素污染。
適合于各種樣品采樣，密封性*，能折疊三次。zui高使用溫度達82°C,可以在任何低溫下使用，甚至是液氮環境。
所有產品都經過嚴格的滅菌處理，請放心使用。
When it is necessary to protect a sample from light, the Whirl-Pak® black bag is specially designed for this application. The polyethylene film is made from pigmented resins so the black color is an integral part of the bag and not a printed layer. The result is an opaque bag providing maximum protection for samples that are sensitive to light. It is ideal for pharmaceuticals, seasonings, flavors, food supplements, vitamins, marine life, and many other liquid or solid products. It is FDA approved for food contact.
The white, write-on strip makes sample identification easier and more convenient. It’s easy to write on this white strip using an ordinary ballpoint pen, pencil, or felt-tip marker. The paper-like finish virtually eliminates ink smearing, and provides a surface that will accept a variety of writing instruments.
Capacity is measured in fluid ounces when the bag is closed and tab is folded over three times. Volume and dimensions are approximate; bags should not be used at temperatures above 180° F （82° C）. Bags can be frozen to any temperature, even liquid nitrogen – careful handling required after freezing. All bags are sterilized after manufacturing.