Step 1: Background: Super Glue (cyanoacrylate)
When using cyanoacrylate glue for fingerprint fuming, it is important to keep in mind that these glues have a short shelf life of about one year from manufacture if unopened, or about one month once opened.
1. The vapors of cyanoacrylate are toxic (http://en.wikipedia.org/wiki/Cyanoacrylate#Toxicity). Take the appropriate precautions to avoid accidental inhalation.
2. Super glue bonds to skin quickly and can easily stick your fingers together. If this happens you can soften the glue with a solvent such as acetone (nail polish remover).
3. Cyanoacrylate reacts strongly with cotton or wool and can burn skin.
Step 2: The Heating Element
I recommend using a small 15-20 watt coffee warmer/candle warmer as the heater. Using a larger heater in a small closed space filled with combustible vapors can be a fire hazard.
Step 3: Glue Tray
There are a lot of regular household items that you could use. You could use a plain metal bottle cap or fold together a piece of aluminum foil into a small tray.
Step 4: Water Reservoir
Step 5: Fuming Container
1. Air tight seal: Super glue fumes are toxic. So ideally, you want to keep them completely contained in the box. If this is not possible, you may want to tape the edges closed. And always be sure to set up your system in a well ventilated area.
2. Clear sides: You will want to check on your sample periodically. You don't want to under develop or over develop your prints. It is much easier to check on the prints if your container has clear sides. That way you don't have to keep opening and closing the container.
3. Just large enough for the sample, the heater and the water tray: If the container is much larger, it will take longer for the super glue fumes to spread and make contact with the sample. An appropriately sized container will help the prints develop faster and more clearly.
4. Convenient power cord access: You need a way to power your heater. So it is nice if there is a convenient way to feed the power cord into the container