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glass
Glass is a non-crystalline amorphous solid that is often transparent and has widespread practical, technological, and decorative usage in, for example, window panes, tableware, and optoelectronics. The most familiar, and historically the oldest, types of glass are "silicate glasses" based on the chemical compound silica (silicon dioxide, or quartz), the primary constituent of sand. The term glass, in popular usage, is often used to refer only to this type of material, which is familiar from use as window glass and in glass bottles. Of the many silica-based glasses that exist, ordinary glazing and container glass is formed from a specific type called soda-lime glass, composed of approximately 75% silicon dioxide (SiO2), sodium oxide (Na2O) from sodium carbonate (Na2CO3), calcium oxide, also called lime (CaO), and several minor additives.
Many applications of silicate glasses derive from their optical transparency, giving rise to their primary use as window panes. Glass will transmit, reflect and refract light; these qualities can be enhanced by cutting and polishing to make optical lenses, prisms, fine glassware, and optical fibers for high speed data transmission by light. Glass can be coloured by adding metallic salts, and can also be painted and printed with vitreous enamels. These qualities have led to the extensive use of glass in the manufacture of art objects and in particular, stained glass windows. Although brittle, silicate glass is extremely durable, and many examples of glass fragments exist from early glass-making cultures. Because glass can be formed or moulded into any shape, it has been traditionally used for vessels: bowls, vases, bottles, jars and drinking glasses. In its most solid forms it has also been used for paperweights, marbles, and beads. When extruded as glass fiber and matted as glass wool in a way to trap air, it becomes a thermal insulating material, and when these glass fibers are embedded into an organic polymer plastic, they are a key structural reinforcement part of the composite material fiberglass. Some objects historically were so commonly made of silicate glass that they are simply called by the name of the material, such as drinking glasses and eyeglasses.
Scientifically, the term "glass" is often defined in a broader sense, encompassing every solid that possesses a non-crystalline (that is, amorphous) structure at the atomic scale and that exhibits a glass transition when heated towards the liquid state. Porcelains and many polymer thermoplastics familiar from everyday use are glasses. These sorts of glasses can be made of quite different kinds of materials than silica: metallic alloys, ionic melts, aqueous solutions, molecular liquids, and polymers. For many applications, like glass bottles or eyewear, polymer glasses (acrylic glass, polycarbonate or polyethylene terephthalate) are a lighter alternative than traditional glass.
32 inch lcd/led tv with remote, power cables and extension cord and nice glass/wood stand. TV works great and is in great condition. Stand is also in great condition and is 3 feet tall and about 2 and a half feet wide
$80 obo for everything. No delivery.
These have been used for a couple of seasons but taken good care of so very minor wear. From cleaning the lenses of dust with a microfiber towel there are some extremely minor circular scratches that do not affect clarity but thought I’d mention to the buyer These have been a great dual...
SIghtmark CoreTX 8.5-25x50MR scope
Awesome scope, better glass than the Vortex (at same price point)
Had this on an AR and took a couple trips to the range. No problems, excellent scope.... my only beef is that all my other scopes are in MILS and this is MOA.
Gets confusing at times.
Comes...
I have a classic Bushnell Spacemaster II spotting scope, 15-45x60mm
Very solid piece, not some Chinese bullbubblegum.
https://www.kenrockwell.com/tech/bushnell/spacemaster-ii.htm
Made in Japan, 70s maybe?
Definitely high quality glass. I used this as a spotter for years.... also get a nice crisp...
Maven b.2 enhanced 7x45 customs. Kings Camo, blaze accents. Excellent condition. Amazing clear crisp binos. Have original box. Only reason for sale is moving to swaro el ranges. Original retail $1200+. Selling for $850 shipped tyd. Or local pickup. Located in centralia, Wa.
Cleaning up my closet - not even sure I'll be fishing in Oregon this year or the next what with ODFW's licensing stupidity. I'm keeping a handful of my most useful and favored rods.
I am willing to ship - if the buyer pays actual shipping costs. Shipping fly rods is not cheap - I shipped a rod...
Just what the title says. For those of you who shoot long distance (300+ yards) what glass do you have on your rifle and why.
I have a vortex on my Tikka and love it. I have a leupold on one of my AR's. Yesterday at the range I noticed more than ever how much better and clearer the glass was...
SOLD Thanks For Looking! This is my Zeiss Classic 10X40 binoculars, they are As New. I purchased them a number of years ago and just could not find a way to use them, so they have been safe queens. As you can see they come with the real leather bag and the original box. You will not find...
7'6" 3 piece fiberglass fly rod, comes with cordura covered rod tube. Great easy casting inexpensive entry to modern glass rods. I like it best with an aggressive 8 weight line, but it will throw anything from a 6 weight to a 9 weight line. It works nice with Commando heads too. I have 2 of...
This rifle was built on an Anderson upper and lower receiver set.
The platform hosts a Faxon Stainless 16”, H-BAR contour, target barrel, chambered .223/ 5.56 Wylde with a 1:8 twist.
A 12” ALG EMR v1, M-lok hand guard/ barrel nut system.
RRA BCG
Geissele SSA-E two stage 3.5 lb trigger
Optics...
Im looking to trade these Costa Fathoms for another pair of Costas with a bigger frame like the Blackfins. These just don’t fit my face quite right. These have brand new glass in them and recently replaced arms. They are the green mirror with a copper base. I would like something with the same...