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Originally Posted by Miaplacidus
PS Where do I get demineralised water?
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Brian
Demineralised is basically distilled water , which you can buy from the local garage.
I wash my 14" mirror about every 6 weeks as I live in a bush region and get a greasy film of Eucaliptus oil on my mirror ( so I start my swabs with methylated spirits before detergent). This film is very tenacoius ( sp) and any residue can easily be seen by breathing onto parts of the mirror and looking at the condensation pattern. When the mirror is free of grease the breath pattern will be smooth and uniform. Aluminisers use this breath test also to see if the mirror is clean enough for coating ( trade secret there !)
Sydney water is fairly soft so I've never bothered with distilled water. I use warm tap water for the final rinse and dap of remaining drops with cotton wool while blowing . Any final lint can be blown off with a camel hair brush. Works for me...
Mark