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CASTING

By Dr. Jeff Medlrum

Here are the basics to making your own authentic Sasquatch track casts.

FIELD KIT
  • Gypsum cement or patching compound
  • 2" wide plastic strips (cut from a bleach bottle or other round plastic jug)
  • Paper clips
  • Camera or Phone
  • Mixing bowl (cut-off beach bottle, tupperware, or even a large ziplock bag can suffice)
  • Measuring cup
  • Wire whisk
  • Latex gloves
  • 1" soft paint brush
  • Newspaper
  • Light plastic sheeting
  • Paper grocery bags
  • Flagging tape
  • Cheap hair spray
  • Trowel
  • Tape Measure
  • Snow impression wax


Castring Process
​
  1. Using the paintbrush (I like to have a pair of tweezers as well to pull out stray leaves/twigs/grass, etc.), clean the footprint while being as careful as possible not to modify it in any way. Then, spray the footprint with the hairspray to help maintain the structure of the impression during the casting process.
  2. Paperclip the plastic strips together in a circle, and press it into the ground surrounding the track.
  3. Mix the water and casting compound together in your container (Dr. Meldrum suggests adding the water first), and stir (don't whip) to a consistency of pancake batter. Tapping the container on the ground can help remove any air bubbles which can create weak spots in the track. The patching compound should tell you the appropriate amount of water to use, but usually it's around 2 parts compound to 1 part water.
  4. Gently pour the casting compound into the track, filling all parts of it and up to the plastic border you've created around your track.
  5. Allow the material to set. Time will vary depending on temperature and humidity and the substrate your mold is in. At this point, you may want to write the date and location into the top of the plaster so you don't forget where you found it... Especially if you go on to find many more! Once it hardens, dig around the border and pry up with a trowel.
  6. Wrap the track in newspaper and allow to dry for at least 48 hours before gently washing it to remove remaining substrate.
  7. You should now be the proud owner of your very own Sasquatch footprint cast!


3D Scanner
3D Scanners
While Casting Tracks is still a great way to get a good copy, in the event you are not able to carry all the plaster and such in your hiking pack there are some new technologies we discussed with Dr. Meldrum on our February 2017 Podcast regarding 3D Scanners.
The excellent feature of these new gadgets are there pack weight and the battery life.  If used actively, scanners can last up to 4 hours, and if on standby, more than 1000 hours (a lot of time in the field without having to carry water which weighs down your pack).

A good 3D Sensor’s frame is made of good-quality anodized aluminum, which provides an optimum temperature for the precision optics placed inside. iPads are not the only device compatible with this gadget, but also any other iOS device which has the possibility of using the Apple Lightning connector. Occipital also stated that they will provide drivers for various platforms, such as Linux, Android, Windows and OS X.

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  • HOME
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  • BELIEVE
    • EXPAND >
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      • Expedition 2020
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