GLASSGLASS

Adriana Adriana AscherováAscherováDaniela BaštováDaniela BaštováLenka HlochováLenka Hlochová

GLASS INGREDIENTSGLASS INGREDIENTS

- Common glass is made from: Common glass is made from: - sand or silica (SiOsand or silica (SiO22) )

- sodium carbonate (Nasodium carbonate (Na22COCO33) )

- limestone (CaCOlimestone (CaCO33) )

- magnesium carbonate (MgCOmagnesium carbonate (MgCO33) ) - additives to improve the glass additives to improve the glass

quality and to colour the glass. quality and to colour the glass.

BASIC INFORMATIONBASIC INFORMATION

– glass is highly resistant to most chemicalsglass is highly resistant to most chemicals– its big enemy is hydrofluoric acidits big enemy is hydrofluoric acid– water can corode glass (depends on water can corode glass (depends on

temperature)temperature)– good termal conductorgood termal conductor– it is a common materialit is a common material

enemy = nepřítel, conductor = vodičenemy = nepřítel, conductor = vodič

FIRST GLASSFIRST GLASS– was made by volcanoes and and is called was made by volcanoes and and is called

OBSIDIAN = shiny, usually blackOBSIDIAN = shiny, usually black– obsidian was formed, when vulcanic molten obsidian was formed, when vulcanic molten

lava comes into contact with water and cools lava comes into contact with water and cools quicklyquickly

– obsidian is mostly from silicon dioxideobsidian is mostly from silicon dioxide

molten = tekutý

HISTORYHISTORY– humans have used natural glass to

create simple tools for a long time– it is not well known where and when

the first man-made glass was produced

– this glass was used as a glaze to decorate objects

– it was also made in ancient Egypt and was valued as much as gold

– glass making was at that time a very slow process

GLASSBLOWINGGLASSBLOWING

= process of forming = process of forming glassglass

glassblowerglassblower

= a person who = a person who blows glassblows glass

INTERESTSINTERESTSSEA GLASS ( or beach glass)SEA GLASS ( or beach glass)

= glass found on beaches along oceans or = glass found on beaches along oceans or large lakeslarge lakes

– it originates from bottles and jars that it originates from bottles and jars that enter the water as litter and become enter the water as litter and become broken up by the waves and rocks broken up by the waves and rocks

– collecting sea glass is a hobby among collecting sea glass is a hobby among beach, and many enjoy filling decorative beach, and many enjoy filling decorative jars or making jewelery from their findsjars or making jewelery from their finds

jars = sklenicejars = sklenice

INTERESTSINTERESTSOPALINE GLASSOPALINE GLASS= a decorative style of glass made in France = a decorative style of glass made in France – can appear either white or brightly colored in can appear either white or brightly colored in

shades of green, blue, pink, black, lavender shades of green, blue, pink, black, lavender and yellow and yellow

– the popularity of Opaline glass began during the popularity of Opaline glass began during the reign of Napoleon the reign of Napoleon

levander = levandulová

GLASS AND GLASS AND ENVIRONMENTENVIRONMENTGLASS RECYCLINGGLASS RECYCLING

= the process of turning waste glass into usable = the process of turning waste glass into usable products products

– 752,000 tons of glass is now recycled annually in 752,000 tons of glass is now recycled annually in the United Kingdom the United Kingdom

– the use of recycled glass in new containers helps the use of recycled glass in new containers helps save energy save energy

– it helps in ceramic manufacture, and it conserves it helps in ceramic manufacture, and it conserves raw materials, reduces energy consumption, and raw materials, reduces energy consumption, and reduces the volume of waste sent to landfill.reduces the volume of waste sent to landfill.

raw = surový, energy consumption = energetická spotřeba, landfill = skládkaraw = surový, energy consumption = energetická spotřeba, landfill = skládka

GLASS AND GLASS AND ENVIRONMENTENVIRONMENT

GLASS COLECTIONGLASS COLECTION– Bottle BanksBottle Banks are very common near are very common near

shopping centers, at civic amenity sites and shopping centers, at civic amenity sites and in local neighborhoods. in local neighborhoods.

– The first Bottle Bank was introduced by The first Bottle Bank was introduced by Stanley Race CBE, then president of the Stanley Race CBE, then president of the Glass Manufacturers’ Federation and Ron Glass Manufacturers’ Federation and Ron England in Barnsley the second was installed England in Barnsley the second was installed in Oxford.in Oxford.

– BB commonly stand beside collection points BB commonly stand beside collection points for other recyclable waste like paper, metals for other recyclable waste like paper, metals and plastics. and plastics.

– There are now over 50,000 bottle banks in There are now over 50,000 bottle banks in the United Kingdomthe United Kingdom

Thx for your attentionThx for your attention