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Unfortunately finding a source for the Hydrochromic ink is not very easy. The only source of a small quantity I was able to find was a site in the UK for £8.99 for 25ml.(about $13 US) and they do not ship outside of the UK. Also I have learned the idea of a color changing umbrella is already out on the market but I do like the idea of possibly designing and creating your own umbrellas, clothing or what ever but I cannot commit the funds to purchase the amounts dealers sell. Also time is a big factor.. lots of projects so little time.
This is a very nice idea!..Gave me the thought of using color changing fabric really can watch the purple rain fall
I have previously drilled a small hole near the bottom of the cup to allow the trapped air to escape and also when a bit of solder escapes from the hole when soldering the wire in place, you know it will be secure.
Antique Meter Prop Build
Dirt cheap Arduino LED light bar!
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