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Storing thinned mixes (Read 444 times)
 
Bruce Kamp
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Storing thinned mixes
Jun 26th, 2016 at 11:15am
 
I posted on another thread about using thinned varnish and poly. Someone mentioned using a plastic squeeze bottle. How do you store your mixed solutions? Say I mix up a 50/50 solution of varnish and mineral spirits. What is the best way to keep it? Or does it skim over and should I just be more careful to only mix what I am going to use?
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Louie Powell
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Re: Storing thinned mixes
Reply #1 - Jun 26th, 2016 at 11:30am
 
Plastic squeeze bottles are convenient, but they breath - which means that whatever is in the bottle will slowly oxidize.  And the more flexible they are, the more they breath.

I use squeeze bottles for shop-made finishes, but I only make a very small quantity at a time, and if I sense that the mixture is stating to go bad, I dump it and mix a new batch.

I also use small glass bottles.  I recycle glass bottles that originally contained cooking spices.  Glass bottles don't breath, but they can wear out very quickly when I droop them on the concrete floor.

Mixing small quantities is easy - I use a standard measuring scoop that started out as the plastic container that held a 35mm film cassette and holds a bit more than an ounce of liquid.  Most shop made finishes are mixed in a 1:1 (or 1:1:1) ratio, and the ratio really doesn't have to be very precise.  Three full scoops just about fill a plastic squeeze bottle from HF.  So I can use one scoop of this with one scoop of that, or I can just imagine a line on the side of the scoop if I want to make up a smaller quantity.
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Don Stephan
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Re: Storing thinned mixes
Reply #2 - Jun 26th, 2016 at 3:40pm
 
Thanks for the information Louie.  Always wondered why the mix started to cure even with Bloygen added after every use.
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Dave Gill
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Re: Storing thinned mixes
Reply #3 - Jul 2nd, 2016 at 11:04am
 
As Louie says - plastic squeeze bottles will breath but I find what has escaped is usually what ever has been used to thin the mixture (lacquer thinner, DNA, Mineral Spirits). If you see a reduction in fluid level that is not related to usage, add a little more of the thinning agent to get it back to the mixture your want - may not be exact but should be close.

I have also found that the plastic bottles sold at HF or hobby stores are pretty thin and will bleed off easily.

You may want to try using condiment bottles (mustard, etc) or dish soap bottles. They are heaver and do not bleed off the thinning agent as quickly. I talked by wife into buying the smaller dish soap bottles which I "requisitioned" when they were empty. Work great for mixing up smallish batches.
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Re: Storing thinned mixes
Reply #4 - Jul 8th, 2016 at 9:29pm
 

Stop Loss Bags do work for longer storage.  Have one that has been holding a seldom used colored varnish for about 18 months now.  Take out what you need, and never never put any back in.  Will some times have a little set up right at the threads.

Stoplossbags.com

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