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Old 21 March 2013, 22:47   #14
Mr B
Registered User
Join Date: Nov 2005
Location: Sweden
Posts: 749
There is a less common color indicating one, orange / green, i think it's down to what chemicals they use for color indication. I've never seen any, but some people claim to have used permanently colored gel. (Supposedly dual purpose, decorative & moist adsorbent in home studio windows. These things are sealed homebuilt double glazed things, so i guess getting the air in there dry makes sense.)
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