Plan on using 10 to 20 pounds of dry ice for every 24-hour period depending upon the size of the ice chest. Dry Ice will keep everything frozen in this ice chest, including extra ice, so keep non-frozen goods to be refrigerated with regular ice in a separate ice chest. Dry Ice normally comes in 10-inch squares, 2 inches thick weighing about 10 pounds each square. Plan to put one square per each 15 inches of ice chest length. This will work out to 2 squares (20 pounds) for an average 40-quart cooler. For larger containers and longer camping or traveling times, multiply dry ice quantities by these rates. Dry Ice, at -109.0°F or -78.5°C, will freeze and keep frozen everything in its container until it is completely sublimated. These frozen items will take some extra time to thaw because they have been so cold.
HOW TO PACK DRY ICE
If the Dry Ice is placed on top of the food (cold sinks), it will work better. However it is sometimes in the way so many people prefer to keep the Dry Ice on the bottom of the ice chest for convenience. When packing items in the container fill the empty space with wadded newspaper or other filler. Any "dead air space" will cause the Dry Ice to sublimate faster. The best storage container is a three-inch thick urethane insulated box. Lining the inside of your ice chest with sheets of Styrofoam will increase the life of Dry Ice. Dry Ice sublimation (changing from a solid to a gas) will vary depending on the temperature, air pressure and thickness of insulation. The more Dry Ice you have stored in the container, the longer it will last.
TRANSPORTING BY AUTO OR VAN
Plan to pick up the Dry Ice as close to the time it is needed as possible. If possible pack insulating items such as sleeping bags around the ice chest. This will stretch the time that the Dry Ice lasts. If it is transported inside a car or van (not in the trunk) for more than 10 minutes make sure there is fresh air. After 15 minutes with Dry Ice only in its paper bag in the passenger seat next to me, I started to breathe faster and faster as though I were running a race. I couldn't figure out why I was so out of breath until I saw the car air system was set in the re-circulated position, not fresh outside air.
Pick up Dry Ice as close to departure time as convenient. Carry it in a well-insulated container such as an ice chest or insulated soft pack. If it is transported inside a car or van for more than 10 minutes make sure there is fresh air available. Most airlines will not let you carry more than two kilograms (4.4 pounds) of Dry Ice on the airplane without special arrangements. Because Dry Ice will sublimate continuously from the time of purchase, you can confidently declare that there is no more than two kilograms at the time you check in at the airport. Dry Ice will sublimate slightly faster due to the lower pressure that the airline maintains during flight. Make plans to refrigerate or add Dry Ice when arriving at your destination.
When finished with the Dry Ice, unwrap and leave it at room temperature in a well-ventilated area. It will sublimate from a solid to a gas. DO NOT leave Dry Ice unattended around children. If you would like a fantastic simulated volcano, run hot water and put the remainder Dry Ice in your garbage disposal. Use safety goggles and stand back. This will make a marvelous eruption.
A 12x12 walk in freezer will use 150 to 250 pounds per day. If the fans are running, place half the Dry Ice as high and close to the back of the evaporator unit where the air is sucked through. Place remainder slabs on top shelves directly on frozen food. Leave door open when entering the freezer. Carbon dioxide gas will accumulate in lowest areas and could cause suffocation. Use the buddy system with one person outside the walk-in at all times to help remove items from the walk-in. Leave walk-in if you start to pant and breath quickly or your fingernails or lips start to turn blue. This is the sign that you have breathed in too much CO2 and not enough oxygen.
A 12x12 walk in refrigerator will use 50 to 100 pounds per day. If the fans are running, place all the Dry Ice as high and close to the back of the evaporator unit where the air is sucked through. Otherwise, place slabs on top shelves without touching any food. Too much Dry Ice will lower the temperature too much and freeze food near the floor. Monitor the temperature closely after several hours. Add or subtract Dry Ice as needed. Keep extra Dry Ice in an ice chest. Leave door open when entering walk-in. Carbon dioxide gas will accumulate in lowest areas and could cause suffocation. Use the buddy system with one person outside the walk-in at all times to help remove items from the walk-in. Leave walk-in if you start to pant and breath quickly or your fingernails or lips start to turn blue. This is the sign that you have breathed in too much CO2 and not enough oxygen.
Placing Dry Ice in the bottom of a dry food storage container is a very economical way to fumigate and store dry goods for an extended amount of time. Make sure the Dry Ice is not frost covered, as that will add moisture. Put one to two ounces of Dry Ice per five-gallon storage container in the bottom and then pour in the dry food. As the Dry Ice sublimates it replaces the oxygen in the container with CO2. Leave the lid on but not tightly sealed until the Dry Ice completely sublimates. Then snap the lid tight. Without oxygen neither bugs nor bacteria can grow. This process is good for seeds, grains, legumes, flower, powdered milk, etc. An excellent site for further information can be found at Walton Feed Inc: http://www.waltonfeed.com/self/upack/dryice.html
REMOVE FLOOR TILE
Dry Ice will loosen floor tile by freezing and slightly shrinking them allowing easier removal. The cold temperature of the Dry Ice will break the bond of the adhesive. Place the Dry Ice sheets centered on the tile to be removed and wait until it is completely frosted. If it has not popped off, slight tapping with a hammer or prying with a screwdriver will allow it to be lifted off easily. It is too time consuming to remove a whole floor, but is ideal for removing a few tiles that need replacing.
Dry Ice is heavier than air so it will find its way to the bottom of gopher dwellings. Place 1 to 2 inch pieces as deep into each hole as can be reached and fill the front of the hole with dirt. If you miss some holes the process may have to be repeated. Jerry Yamamoto of Hayward, California reports that he successfully used Dry Ice to eradicate regular Argentine ants from his front yard. Perhaps this could work on fire ants too.
PROTECT SPORT FISH AND GAME
Pack your trophy animal or fish in Dry Ice to minimize spoilage while transporting or shipping it home. Do not let the Dry Ice touch the game directly as it may cause superficial damage. Dry Ice can be added to regular ice to extend its cooling. For best results use an insulated container.
Dry Ice is used to super cool alcohol for branding horses, cattle, and hunting dogs. The alcohol must be 90% pure - not rubbing alcohol. Methyl alcohol is most commonly used. Liquid Nitrogen is too cold to work properly. This is now the second most common way to brand.
Doctors, to freeze skin for wart removal, use Dry Ice or liquid nitrogen. Many medical offices ship biological specimens in Dry Ice for laboratory testing or further processing. Dry Ice is also used to keep bone morrow frozen when it is shipped.
Dry Ice will keep flowers cool and delay blooming. Maintaining ready to flower plants at 34°F will retard blooming. Do not allow Dry Ice to get too close and freeze plants.
A small additional amount of Carbon Dioxide will increase the rate of plant growth.
Its low temperature slows or stops some chemical reactions. It is used to store and ship special adhesives It is also a neutralizing agent for alkalis.
When Dry Ice changes from a solid to a gas it absorbs heat and expands to over 800 times its original volume.
Dry Ice will replace oxygen in a container preventing or putting out fires. It is used to safely remove underground gas storage tanks.
Dry Ice will shrink metal to slide on sleeves, bushings or bearings. Add Dry Ice to a 90% pure alcohol bath to create a cold liquid near -109.3°F. that can be used like liquid nitrogen.
DEFLASHING MOLDED PLASTICS AND
Dry Ice will cool and shrink whatever it touches. Rubber parts are tumbled in a barrel with Dry Ice, making them brittle for easy flash removal. It is used in cold grinding of Plexiglas, PVC resins and vinyl's.
FRESH MEAT PROCESSING
Dry Ice will keep the temperature cold and reduce spoilage while processing meat. This is used in industrial processing of ground meats and sausages.
CO2 may attract mosquitoes away from animals and people. Place pieces of Dry Ice away from areas where people are congregating. The theory is that mosquitoes find animals and people by their CO2 exhaled during breathing. Melissa Palm reports that dry ice does attract mosquitoes. "I use dry ice in some of my mosquito traps as bait and find that it works rather well." The Clarke Family of Companies of Roselle IL., sells a mosquito trap designed for using Dry Ice.
Dry Ice combined with detergent, or alone, will improve porosity in irrigation wells. Bill Hayoz of Reliant Dry Ice in New Mexico, explains that dry ice is used regularly by the ranchers to improve water flow. He used about 60 pounds of dry ice in his windmill well, capped it off, and waited several days before the water came back with a greater flow. Most well men will use dry ice before drilling deeper.
Dry Ice has been used in the oil fields for years to clean tank bottoms. When paraffin, sludge, etc build up, a chemical is added along with Dry Ice to roll (stir up) the tank bottom. This breaks out the liquids & separates water from oil in paraffin mixtures so that water can be removed & the oil saved." Liquid CO2 is also used to crack and increase oil flow in wells.
Dry Ice is used in mixing ingredients and retarding yeast growth until the proper time.
FREEZE FRESH STRAWBERRIES PERFECTLY
Wash fresh strawberries
Place directly on top of dry ice in cooler for about 20-30 minutes
Remove when solid
Place in freezer safe plastic bag, mark with date
Place in freezer - to thaw take out and set on plate at room temp (use within a year to be sure freshness)
They will thaw almost like fresh - without being soggy like usual frozen strawberries are.
I suppose this might work for other fruits and veggies because of the quick freeze time, not allowing them to get soggy..."