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Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
Pontil scar on the base of a free-blown glass bowl. A pontil mark or punt mark is the scar where the pontil, punty or punt was broken from a work of blown glass.The presence of such a scar indicates that a glass bottle or bowl was blown freehand, while the absence of a punt mark suggests either that the mark has been obliterated or that the work was mold-blown.
Beer bottles of different colors. Glass coloring and color marking may be obtained in several ways. by the addition of coloring ions, [1] [2] by precipitation of nanometer-sized colloids (so-called striking glasses [1] such as "gold ruby" [3] or red "selenium ruby"), [2] Ancient Roman enamelled glass, 1st century, Treasure of Begram
Glass bottles and glass jars are found in many households worldwide. The first glass bottles were produced in Mesopotamia around 1500 B.C., and in the Roman Empire in around 1 AD. [ 1 ] America's glass bottle and glass jar industry was born in the early 1600s, when settlers in Jamestown built the first glass-melting furnace.
Northwood mark on a vase. The most common Northwood maker mark was an underlined capital N centered inside of a circle. [13] [14] Not all pieces carry the mark but it is seen most often on carnival glass items. L.G. Wright also used a mark like it, but was forced to stop using it. [13]
A fill line on a German wine glass. Germany has had a number of weights and measures acts specifically addressing volumetric markings on glassware. Local and state laws have since been superseded by the federal Mess- und Eichgesetz ("Measurement and Calibration Act"), which in turn was updated to implement the EU directive.
The resin identification codes can be represented by Unicode icons U+2673 ♳ RECYCLING SYMBOL FOR TYPE-1 PLASTICS; U+2674 ♴ RECYCLING SYMBOL FOR TYPE-2 PLASTICS; U+2675 ♵ RECYCLING SYMBOL FOR TYPE-3 PLASTICS; U+2676 ♶ RECYCLING SYMBOL FOR TYPE-4 PLASTICS; U+2677 ♷ RECYCLING SYMBOL FOR TYPE-5 PLASTICS; U+2678 ♸ RECYCLING SYMBOL FOR ...
Another type of mark is found on glass baskets. Where the glass handles of the baskets are attached to the base of the basket a stamp is made. [9] Each handler had a specific pattern to help identify which handler attached the handle. [9] The marks began in the 1950s and were instituted by Frank M. and Bill Fenton. [9]