Science Club
  1. Does Black Bark Mulch Help Keep Moisture in the Soil?
  2. How Much Water does a Fountain Use?
  3. Find your Body Surface Area
  4. How Fast do French Fries Cool Down?
  5. My Year of Coincidences
  6. Which Firework is the Loudest?
  7. Cost to store a VHS tape in a NYC apartment?
  8. Guess Your Blood Alcohol Level Booth
  9. Find the Loudest Restaurant in Sacramento
  10. How Much do Clothes Weigh?
  11. Trying to Make Clear Ice
  12. Searching the Indian Ocean for a Plane Crash
  13. Electronic Cigarettes - The Fog Machine for Your Face
  14. Scott Leased an Electric Ford Focus
  15. Testing the Effectiveness of a Beer Cozy
  16. Eggshells vs. Taco Shells
  17. How Ice Rinks are Made
  18. Shaken vs. Stirred
  19. Real Appliance Energy Use Tests
  20. Christmas Lights Power Cost
  21. The Best Cold Drink Cup
  22. LED vs. Regular Bulbs & CFLs
  23. Coldest drink in town?
  24. Using Salt to Cool Down Beer
  25. Coors Light Cold Indicator
  26. The Fastest Way to Cool Down Beer
  27. Hairdryer vs. Bowl of Water
  28. Bathroom During a Movie?
  29. Video Projector on a Disco Ball
  30. Cool Trunk
  31. The weight of popcorn
  32. Sunchips bag decomposition
  33. Disscating a cockroach
  34. Sensefly Drone Camera
  35. Entrance Locked
  36. End Rubbernecking
  37. Eyeclops Night Vision
  38. Miracle Fruit Taste Test
  39. Hot Air Bubbles
  40. Helium Bubbles
  41. Neighborhood Speed Trap
  42. Pizza Race
  43. Eyeclops - Bionic Magnifier
  44. Breathalyzer Testing
  45. Fishing Line Fiberoptics
  46. The Value of CFL Bulbs
  47. Barry Marshall Fan Page
  48. Bottling the Keg Leftovers
  49. Spinning Rim Centrifuge
  50. Backwash Experiments
  51. sidewalk chalk
  52. Red Hot Vioxx Action!
  53. Balloon Delivery
  54. Tanning
  55. Making a Candle Out of Lipstick
  56. Evaporation
  57. The lift of a Helium Balloon
  58. Lard Candle
  59. The Properties of Heat Transfer
  60. Insulation Testing
  61. Eating Out
  62. Eating In
  63. Tattoo Removal
  64. Drying Laundry
  65. Viscosity Testing
  66. Magazine Advertising
  67. Collecting Data
  68. Dropping Toast
  69. Refilling an Ink Cartridge
  70. Tampons
  71. Light Bulbs

How much is Inside?
Community & Citizenship
Height Weight Chart
Science Club
Incredible Stuff
How To Guides


Trying to Make Clear Ice - page 3

Plastic bags are much thinner than the other containers I was trying, which should have allowed me to control the formation of ice inside. I also had a theory that this would prevent frigid air from dissolving back into the liquid.

Unfortunately, the plastic film provided a surface for air bubbles to sit on. The resultant ice was cloudy throughout, with a uniform film of bubbles.

On my next attempt, I tried resting the ziplock bag on a thick sheet of styrofoam. This would cause the top to freeze first.

The results were pretty much the same. Bubbles-a-plenty.

One more idea was to try to knock off the surface bubbles with a soft towel underneath, and a sheet of styrofoam on top.

That didn't work either.

My final attempt with a ziploc bag summarized the "expanding ice" problem.

The center was the last part to freeze, illustrating how the ice will naturally expand to take a shape larger than the liquid water. If this ice block had been contained within a hard plastic cup, the expanding ice would have cracked out of the surrounding ice.

The plastic bag didn't work out for making clear ice, but it did help to illustrate the limitations of thin plastic containers.

I had one more idea for the flashlight method: a huge lantern flashlight warming up a smaller container of water.

That didn't work. The first ice to freeze was very clear around the edge of the container, but again, the center ice held the opaque gas and cracked the surface as it expanded.

My next tactic, I think this was the 13th try, was to pull some of the dissolved gasses out of the water before I froze it.

I filled an old Pepsi bottle with distilled water, pinched the center and re-capped the bottle. The shape of the bottle was now pulling the water, keeping it in low pressure.

Note that this is the opposite of the usual purpose of a two-liter soda bottle. Usually the bottle is under high pressure, bulging with carbonated gas, the cap keeping the pressurized gas in solution. In the pinched-bottle arrangement, the bottle is pulling at the liquid, drawing out the gas, trying to get back to it's natural cylindrical shape. I left the water in this vacuum for one day, then put it into the freezer.

Please Read Page 4 of Making Clear Ice >

1 | 2 | 3 | 4 | 5 | 6 on Facebook Cockerham on Twitter C K Rob Cockerham on Linkedin Rob Cockerham on G+

The Quest for a solid ice beer tray   Heat Transfer Experiments   Eyeclops Digital Magnifier   Trying to make hot air bubbles   Eyeclops Night Vision goggles   How to Eliminate Rubbernecking   My Homemade Speed Trap 
  • Photographic Height/Weight Chart
  • The Weight of Clothing
  • The Television Commercial Database

  • Cockeyed home page | Contact | Terms and Conditions | Updated January 27, 2014  Copyright 2014