Glassmaking dates back 3500-4500 years. Glass is made from heating a batch of ingredients including silica sand, limestone, and soda ash to 2800 degrees Fahrenheit. Once melted and transparent, the glass is cooled to 180 degrees and formed. Recycling glass saves raw materials and reduces energy usage, water consumption, and air emissions compared to using raw materials. Certain contaminants like ceramics, plastics, and light bulbs can ruin an entire load of recycled glass.

1. GLASS

2. How many years ago didHow many years ago did
humans start making glass?humans start making glass?
 800 years800 years
 1200 years1200 years
 2000 years2000 years
 3500-4500 years3500-4500 years

3. Glass is made from 3Glass is made from 3
principal ingredients:principal ingredients:

4. Silica Sand

5. LimestoneLimestone

6. Limestone karsts inLimestone karsts in
ChinaChina

7. Soda AshSoda Ash

8. How glass is madeHow glass is made
 The batch ofThe batch of
ingredients is heatedingredients is heated
to up to 2800 degreesto up to 2800 degrees
Fahrenheit.Fahrenheit.
 Once melted andOnce melted and
transparent, the batchtransparent, the batch
is cooled to 180is cooled to 180
degrees F and moveddegrees F and moved
into a glass forminginto a glass forming
machine.machine.

9. GLASSGLASS

10. Some old school glassSome old school glass
factories..factories..

11. A modern day glass factory

12. Why recycle glass?Why recycle glass?
 1 ton of recycled glass1 ton of recycled glass
saves 1.2 tons of rawsaves 1.2 tons of raw
materialmaterial
 Adding “cullet” theAdding “cullet” the
batch greatly reducesbatch greatly reduces
energy usage, waterenergy usage, water
consumption, and airconsumption, and air
emissions.emissions.
 Glass remains inGlass remains in
landfills indefinitely.landfills indefinitely.

13. The following things, even in smallThe following things, even in small
amounts, can contaminate an entire loadamounts, can contaminate an entire load
of recycled glass:of recycled glass:
 Ceramics (plates, coffee mugs)Ceramics (plates, coffee mugs)
 Window glass and mirrorsWindow glass and mirrors
 Plastic, tin, aluminum lids/tabsPlastic, tin, aluminum lids/tabs
 Pyrex glassPyrex glass
 Wired glassWired glass
 Crystal and drinking glassesCrystal and drinking glasses
 Light bulbs or tubesLight bulbs or tubes

14. Only in Vegas….Only in Vegas….

15. Follow Up Quiz…Follow Up Quiz…

16. What are the threeWhat are the three
main ingredients ofmain ingredients of
glass?glass?
 A) Silicone, Limes, Soda cansA) Silicone, Limes, Soda cans
 B) Lava, Petroleum, LeadB) Lava, Petroleum, Lead
 C) Plastic, Rubber, GravelC) Plastic, Rubber, Gravel
 D) Limestone, Soda Ash, Silica SandD) Limestone, Soda Ash, Silica Sand
 E) All of the aboveE) All of the above

17. Once you have the raw ingredients, whatOnce you have the raw ingredients, what
condition is necessary to produce glass?condition is necessary to produce glass?
 A) A relaxed, serene state of mindA) A relaxed, serene state of mind
 B) A good offensive lineB) A good offensive line
 C) A giant freezing systemC) A giant freezing system
 D) A whole lot of heatD) A whole lot of heat
 E) A perfect driving recordE) A perfect driving record

18. What are the benefits of
recycling glass?
• A) Saves raw material
• B) Greatly reduces energy use
• C) Reduces air pollution
• D) Conserves water
• E) All of the above

19. Which of the following types ofWhich of the following types of
glass cannot be recycled?glass cannot be recycled?
 A) Glass jarsA) Glass jars
 B) Drinking glassesB) Drinking glasses
 C) Light bulbsC) Light bulbs
 D) Broken beer bottlesD) Broken beer bottles
 E) B & CE) B & C

20. Any Questions?Any Questions?
 Remember: Blue glass gets sorted withRemember: Blue glass gets sorted with
brown!brown!
 Always wear eye protection when sortingAlways wear eye protection when sorting
or dumping glass, and if you want to enjoyor dumping glass, and if you want to enjoy
music into your old age, you should wearmusic into your old age, you should wear
ear protection too!ear protection too!