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Is wax paper a good insulator?

Waxed paper's particularly high dielectric strength makes it a practical electrical insulator, although modern materials have surpassed and mostly replaced it.

en.wikipedia.org - Waxed paper - Wikipedia

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Waxed paper

Waxed paper (also wax paper, waxpaper, or paraffin paper) is paper that has been made moisture-proof and grease-proof through the application of wax. The practice of oiling parchment or paper in order to make it semi-translucent or moisture-proof goes back at least to the Middle Ages. Paper impregnated or coated with purified beeswax was widely used throughout the 19th century to retain or exclude moisture, or to wrap odorous products. Gustave Le Gray introduced the use of waxed paper for photographic negatives in 1851.[1] Natural wax was largely replaced for the making of waxed paper (or paraffine paper) after Herman Frasch developed ways of purifying paraffin and coating paper with it in 1876.[2] Waxed paper is commonly used in cooking for its non-stick properties, and wrapping food for storage, such as cookies, as it keeps water out or in. It is also used in arts and crafts.

Food preparation [ edit ]

Waxed paper is not recommended for baking use in an oven, as it will smoke and explode .[3] Parchment paper is better for this use. In a microwave, waxed paper can be used to prevent splatters by covering the food when microwave cooking. Since the paper is mostly unaffected by microwaves, it will not heat to the point of combustion under normal usage. This makes waxed paper more functional than plastic wrap which will melt at higher temperatures, or aluminium foil which is not safe for use in most microwave ovens.

Other uses [ edit ]

Safety razor blades are traditionally wrapped in waxed paper to make handling them less dangerous.[4] From the early 1950s to the mid-1990s, waxed paper was used as a common wrapping for sports card packages (O-Pee-Chee, Topps, Donruss, etc.). It was notorious for leaving wax markings on the back card where the waxed paper was heated to be sealed. Waxed paper was used as a way to keep the enclosed piece of bubble gum protected. In the mid-1990s, sports card manufacturers stopped including pieces of bubble gum in packs of sports cards, thus ending the need for waxed paper packs. Plastic (mylar) or other plastic/paper blends were used from then on. A version of the paper, trademarked Waxtite, was used to protect early packages of Kellogg's cereal. Waxed paper is also commonly used to attach pattern pieces to fabric while cutting it for sewing. One presses an iron over the waxed paper briefly and attaches it to the cloth, making it easier to trace while cutting. Waxed paper's particularly high dielectric strength makes it a practical electrical insulator, although modern materials have surpassed and mostly replaced it. Common applications are coil winding separators and capacitor dielectrics, and other applications requiring resilience against a potential difference up to the order of a few thousand volts per layer. In photography, waxed paper can be used as a light diffuser. Making waxed paper roses was a hobby among Sri Lankan women.

Environmental issues [ edit ]

There are multiple environmental issues concerned with waxed paper. Though it is biodegradable in its unaltered form[citation needed], oft-applied additives such as petroleum rid it of that quality. Waxed paper also cannot be recycled.[5]

References [ edit ]

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What is the R-value of 2 inch blue Styrofoam?

STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F.

twperry.com - STYROFOAM/BLUE BOARD 2"" 4'X8' DOW R-VALUE - TWPerry |

Styrofoam™ was invented by Dow more than 50 years ago and identified by the distinctive Blue™ color. Dow invented a process for extruding polystyrene to achieve a closed cell foam that resists moisture. How does it work? Resistance to the flow of heat is measured in "R-value", the higher the R-value, the harder it is for heat to get through. STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F. The material R-value for the entire wall assembly is derived by adding an R-value of Styrofoam0.08 per inch for concrete along with an interior air film coefficient that produces an R-value of 0.68 and an exterior air film coefficient that produces an R-value of 0.17. A wall utilizing STYROFOAM T-MASS Technology with a 2-inch exterior layer and a 4-inch interior layer of concrete along with a 2-inch layer of STYROFOAM extruded polystyrene insulation would result in a material R-value of approximately 11.33.