Opal glass has been around a long time, it was first manufactured by glass blowing houses in 16th century Venice! Opal glass is made by adding opacifiers to the melt. The particles in the opacifiers scatter light via the Tyndal Scattering Mechanism. The way light is scattered and the secondary colors produced depend on the size of the particles in the opacifiers added to the melt. Modern opal glass typically has the appearance of opaque white glass, but has also been manufactured historically in pink, blue, yellow, brown and black. http://opal%20glass%20pump%20bottle/

Most candles are made of paraffin wax (a petroleum waste product that is chemically bleached), which creates highly toxic benzene and toluene (both are known carcinogens) when burned. In fact, the petro-soot released from paraffin candles are the same as those found in diesel fuel fumes and can be as dangerous at second-hand smoke. In 2001, the EPA concluded that burning paraffin candles emit harmful toxins and increase health risks with multiple exposures. http://www.crystalcandlesupplies.com/candle/scented-candle/

Small amounts of bauxite can be found in Arkansas, Alabama, and Georgia. Overall, though, there is very little mining of the mineral in the U.S., with 99% of it being imported from other countries. Around the world, Australia, China, Brazil, India, Guinea, Jamaica, Russia, Kazakhstan, Suriname, and Greece are the top ten leading bauxite producing countries. The top producers of bauxite have enough reserves for many years of continued production, with some having reserves lasting 100 years. http://www.kingconref.com/bauxite/rotary-kiln-bauxite/

Freezing food and maintaining it at 0° Fahrenheit will keep it safe. The quality could suffer during lengthy freezer storage. Freezing keeps food safe by slowing down the movement of molecules, causing microbes to enter a dormant stage. The freezing process preserves food for extended periods because it prevents the growth of microorganisms that cause both food spoilage and foodborne illness. http://www.mtehomelife.com/kitchen-shelf-rack/

The roofing industry is full of different names and terms that are hard to understand as a homeowner. This can be confusing and often frustrating. Especially when different roofing contractors use different terms to mean the same thing. This brings us to a commonly asked question, “Are composition shingles and asphalt shingles the same thing?” For over 30 years, the team at Bill Ragan Roofing has helped homeowners understand the lingo, terminology, and other aspects of the roofing industry. Now we'll be doing the same thing for you. http://www.onicesroofing.com/asphalt-shingle/

Because glass expands and contracts with changes in temperature, care must be taken when reagent bottles are heated and cooled. When a reagent bottle is heated, the neck expands, allowing the tapered stopper to drop farther into the bottle. When the bottle is then cooled, the neck shrinks around the stopper, locking it in place. The rough surface of the neck and stopper prevents the stopper from sliding up as the neck shrinks. http://www.sun-trine.com/reagent-bottle/

Their function is to seal off gases generated in the internal combustion process, help with transferring heat to the cylinder wall and then to both lubricate and scrape down oil from it. Getting the quantities of oil right is vital. Too much oil will cause it to burn off during combustion potentially making your engine produce blue smoke, too little will cause the engine ultimately to seize. http://www.wellfarengineparts.com/piston-ring/

What 2021 hair trends should you know about? Despite the rollercoaster of a year that 2020 was, there's no denying that it was certainly memorable. And while a lot of those memories might have been made at home, that doesn't mean there weren't any good times. Still, 2021 is on track to be much better than the previous year, and that means there are new and exciting trends to look forward to. http://www.bulkhairaccessories.com/hair-accessories-gift-sets/

A load bank is a self-contained device that has the load elements, controls and cooling systems it needs to operate built-in. Power is delivered to a load bank, which then consumes the electrical power by applying it to a power source and either converting or dissipating the source's power output. Load banks use the energy produced to protect, support or test a power source while a "real" load or actual building load uses energy output productively. http://www.cnloadbank.com/load-bank/

How to Clean a Car Interior Cleaning the interior of your car may not bring back that heady new car smell, but it will certainly improve the air quality. Washing the windows, getting rid of trash and clutter, and cleaning the carpet and seats will make you breathe easier and could even improve your driving skills. Professional detailing can be quite costly, but with just a few tools and cleaning supplies that you probably have on hand, you can clean your car interior just like the pros. http://www.conversionvaninterior.com/car-interior/