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Proper salinity tester when making alum crystals?
  
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Martin Baender




Joined: 17 Sep 2022
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Location: Banff

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PostPosted: Sep 18, 2022 00:55    Post subject: Proper salinity tester when making alum crystals?  

Hello!
I am producing alum crystals, and seek a means of checking the concentration of alum salt in the distilled water, as this affects the type of crystal growth from the solution. In my process I'm growing crystals over 10~14 days, and intend to create a mass production approach for my own devious purposes. While I can keep rough track of a single solution growing 1 crystal, I need a way of taking a reading vs. an educated guess.

Online I do find salinity testers that go to 25% concentration, but doubt these are intended for what I'm doing. For example, a typical solution would have 60ml alum:250ml distilled water, or 24%. I need a means of measuring beyond 25% as it is easy to reach 40% if enough water evaporates between 'cycles' and a heavy hand is used topping up the alum intended to grow onto the existing crystal.

Thanks for any guidance!



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Peter Lemkin




Joined: 18 Nov 2016
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PostPosted: Sep 18, 2022 12:20    Post subject: Re: Proper salinity tester when making alum crystals?  

I hate to be the bearer of bad news, but this site is about natural minerals, not man-made ones. I suggest you seek your answers on another website. Good luck.

Martin Baender wrote:
Hello!
I am producing alum crystals, and seek a means of checking the concentration of alum salt in the distilled water, as this affects the type of crystal growth from the solution. In my process I'm growing crystals over 10~14 days, and intend to create a mass production approach for my own devious purposes. While I can keep rough track of a single solution growing 1 crystal, I need a way of taking a reading vs. an educated guess.

Online I do find salinity testers that go to 25% concentration, but doubt these are intended for what I'm doing. For example, a typical solution would have 60ml alum:250ml distilled water, or 24%. I need a means of measuring beyond 25% as it is easy to reach 40% if enough water evaporates between 'cycles' and a heavy hand is used topping up the alum intended to grow onto the existing crystal.

Thanks for any guidance!
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