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Old 05-15-2021, 10:26 PM   #1
pcampbell
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Default Brix measurement of 50/50 boost juice

Does anyone know what 50/50 water meth measures on a Brix refractometer? Would like the number for mixing at home.

I believe that I can use my old beer brix refractometer to dial in the mixture.
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Last edited by pcampbell; 05-16-2021 at 07:38 AM.
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Old 05-18-2021, 09:36 PM   #2
speedyHAM
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https://faculty.weber.edu/ewalker/Ch...20Readings.pdf

Page 4. Unless your brix refractometer is extremely accurate I don't think it would be a great way of dialing in the mixture. Between 44% and 56% the value only ranges between 1.3429 and 1.3431.
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Old 05-19-2021, 07:55 AM   #3
pcampbell
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Thanks... interesting. I took some -20F wiper fluid and measured it. Then displaced 36 oz with straight methanol and came up with something like 1.035. There were subtle but noticeable changes as I added 12oz at a time and measured it.

I am thinking if you remove about 36 oz of wiper fluid it’s leaves about 28oz of methanol if it’s about 30% for -20F (.3 x remaining 92 oz). Add 36 oz of methanol equals 64oz or 50% by volume. I’m sure it’s NOT perfect.

I know various brands have different concentrations. The other thing I’m not sure is if there’s separation of the water and methanol on the shelf.

So when I poured out 36oz It may not have been 36oz of “-20F” fluid but possibly something else if they separate.
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