A rad way to remove radiation sickness... yeah, I know. I hate myself, too.
Step 1: Materials and Tools
- Transparent flexible plastic sheet; enough to cover the template twice.
(NOTE: try to find plastic sheeting that is fairly thick. Something like a grocery bag is too thin; it wouldn't be durable. I have a small piece of plastic sheeting that is used as a moisture barrier to insulation in construction, but anything you have that is thick and durable is fine.)
- Clothes Iron
The picture above is a template for the plastic as well as a label that will be applied later.
Step 2: Planning and Connecting
On the template, the out-most line is the size of the pouch, which you will cut along. The second line in is the rough amount you want to seal, and inside of that is the label that will be used later.
Line up your plastic pieces and tape them together with folded masking tape between the two layers so that they fit inside of the template. Tape the template to the bottom of the pieces and trace it on top with a dry-erase marker so that you can wipe it off after you've cut it out.
(NOTE: leave some extra space around the lines when you cut it out so that you can trim off the inevitable wavy edges.)
(NOTE#2: Leave even more space around the tubes on the bottom. You'll need some room to work with later on.)
(The video linked is where I got the technique for sealing the edges from. It isn't my video; it's by HandmadeByKristen. I thought I'd include it because I didn't come up with the technique.)
Once the pouch is cut out, still taped together, place the edge of the pouch into a folded piece of tinfoil and melt the edges together with the clothes iron. Try to make an even seal about a quarter of an inch around the pouch.
(NOTE: Give a few seconds after melting the plastic before pealing the tinfoil off so the plastic cools properly.)
(NOTE#2: After you've sealed one or two of the sides, remove the tape. I sealed three of the sides and had some trouble removing it in the confined space.)
(NOTE#3: Only seal the sides and top. Leave the bottom side with the tubes open.)
Once you've sealed three of sides, run your finger around the inside against the seam to test the seal. If the seal peels, redo it until the section is melted together. Once you think the three sides are sealed, fill it with some water to test it for leaks, just make sure the inside is more-or-less dry before you continue.
Step 3: Sealing the Top and Filling the Pouch
Before sealing the bottom, cut some tinfoil and fold it into two thin strips roughly 1/4" wide and place them in the middle of the tubes. Make sure that they are neat and straight, and extend past where will be sealed. These will be used as openings to fill the pouch later. One tube will be used to put liquid in it, the other for air-flow.
Seal across the top and remove the tinfoil strips. This can be tricky. Use a wire or something to peal the plastic off of the tinfoil by inserting it into the tube above and below the tinfoil. Be careful not to tear the tinfoil or poke any holes in the plastic. Once you're confident enough that the tinfoil can be pulled out, gently do so while being mindful of any tearing. If any tinfoil gets stuck inside of the pouch, it will be extremely difficult to pull it back out.
To fill the pouch, you'll need to funnel liquid into the pouch through one of the tubes. I used a straw to get the water in. The straw was too big at first, so I had to cut down the length of it and fold it over to fit.
(NOTE: Be careful not to push the straw/funnel through the plastic. Be gentle. Mine was a very tight fit.)
Once your funnel is in, slowly pour in the liquid. Filling the pouch will take a bit of time. The pouch will hold more liquid, but a good amount to put in is about 2-1/4 cups. You can use whatever liquid you want for this. Mix up some fake blood if you're making a blood pack, or a dark-brownish-golden liquid if you're making a RadAway. I used flat root beer because it's colors work well. If you use root beer (or similar) as well, make sure it's flat; you don't want the pouch bursting on you because of the pressure from the carbonation.
Once you feel like it is full enough, try so squeeze or suck out any liquid in the air-flow tube. Try to position your pouch so that the liquid sits at the bottom of the bag while you have a surface to seal it on, such as letting the pouch hang off the edge of the table while you seal the tube.
The second tube it trickier. Isolate the air bubbles under the tube that you filled the pouch with and slowly squeeze out the air, then pinch the base of the opening tightly. Keep holding onto the base and pull out the straw/funnel. Again, try to get any liquid in the tube out and then seal it. If you're left with any unwanted air bubbles in the pouch, isolate them to a corner of the pouch (try to merge them all into one bubble), and poke a tiny hole as close to the edge as you can with a needle or knife. Delicately push the air out and try to seal it back up.
Tip the bag around at different angles, and gently tug and squeeze it to test for any leaks. If you're lucky, any leaks that occur will be at the edges. Mine had one just below one of the tubes.
Step 4: Applying the Label
Cut out the label in the middle of the template. I left it blank on purpose so that it can be used for both a Blood Pack and a RadAway.
Glue the label onto the pouch. I used rubber-cement. It wasn't the best bond, but it did stick to both the plastic and the paper without damaging either.
If you're making a RadAway, write "Rad Away" on it with some black paint or a thick permanent marker (Something to keep in mind, though, if you use paint, it may start to peel/chip off of the plastic, so you might want to substitute accuracy for durability by writing it one the paper only).
(I intentionally left the tubes longer than they should be because there are supposed to be clips on the end of them. I haven't found anything yet that would suitably work. Later I guess...)