Jump to content

Banner.jpg.b89429c566825f6ab32bcafbada449c9.jpg

Where to buy Distilled water from?

Rocketron

Recommended Posts

Rocketron

Rocketron

Posted
Posted

I have decided to clean the mirror on my scope :)

Does anyone know where I can get some distilled water from to rinse the mirror with.

Everywhere I try only sells demineralised water which I believe is not as pure.

Cheers

Ron

Link to comment
Share on other sites
  • Replies 27
  • Created
  • Last Reply
Carl*

Carl*

Posted
Posted

i used to buy it from car spares shops like Halfords for the batteries on my motorbikes but havn't looked for years!

I now work in a lab for a company that makes Mass Spec instruments and we have a RO Elga water system that produces as pure water as you can get!

If you live near south Manchester i could supply you with gallons of the stuff! (free of course!)

Link to comment
Share on other sites
Rocketron

Rocketron

Posted
  • Author
Posted

If you live near south Manchester i could supply you with gallons of the stuff! (free of course!)

Carl,

Thanks for the offer

If I can get up to South Manchester I may take you up on your kind offer.

Aza,

My understanding is that :-

Distilled water is produced by boiling water and capturing the pure vapour that is generated from the steam. Distilled water contains no harmful 'clogging' minerals.

De-ionised water contains no ions. This means that through an electrolytic process, the chemically reactive molecules have been removed.

De-ionised water is obviously better than tap water but Distilled is what I have been advised to use.

Link to comment
Share on other sites
RobH

RobH

Posted
Posted

De ionised water is not the same as distilled water, and contains impurities.

You can get distilled water from places that specialise in cigars of all things!

They use it to keep the cigars moist.

I got mine from a company on ebay called cigar pleasures.

Cheers

Rob

Link to comment
Share on other sites
Rocketron

Rocketron

Posted
  • Author
Posted
De ionised water is not the same as distilled water, and contains impurities.

You can get distilled water from places that specialise in cigars of all things!

They use it to keep the cigars moist.

I got mine from a company on ebay called cigar pleasures.

Cheers

Rob

Thanks Rob,

I had a quick look but couldn't find them,

Do you have a link for them please.

Link to comment
Share on other sites
Rocketron

Rocketron

Posted
  • Author
Posted

Thanks for trying Rob,

I've found a couple of other dealers on ebay selling Distilled water but a bit pricey £15 for 5 litres.

That's not going to go far with a 14" Dob mirror to clean.

Ron

Link to comment
Share on other sites
RobH

RobH

Posted
Posted
I got battery top-up water from Halfords (de-ionised?). It's as good as you need IMHO - I've cleaned three mirrors with it and it didn't leave any water marks.

Andrew

Can't argue with that....the proof is in the pudding :)

Cheers

Rob

Link to comment
Share on other sites
Nem94

Nem94

Posted
Posted

OK. I can speak from a position of quite some knowledge here (Clinical Chemistry Engineer), RO (Reverse Osmosis) and DI water are used in labs as they are as pure as you need, typically the resistance of such water will be in excess of 30 Meg and the TDS/TOC will be <5ppm; plenty pure enough for your use. It is widely available in fish shops (As in aquarium) and you will pay around 75p a litre.

Distilled water and the purer double distilled water I would consider TOO pure and you risk stripping your surface. Distilled water is used to purify other liquids, it does this because water by nature wants to be at chemical equilibrium with whatever it is touching and it quickly absorbs things from whatever it is in contact with to 'ballance' itself with it, especialy minerals.

In the same way large amounts of too pure water is dangerous in an aquarium, and indeed for you, it would be a risk on your mirrors also IMO. Water that is pure although not acidic property wise has acid-like behaviour when in contact with anything less pure than it, you can actualy watch it strip things down as it absorbs the minerals from it.

Just my tupence-worth, and obviously there is a little more to it than that, but in a nutshel....

:)

Link to comment
Share on other sites
Rocketron

Rocketron

Posted
  • Author
Posted
OK. I can speak from a position of quite some knowledge here (Clinical Chemistry Engineer), RO (Reverse Osmosis) and DI water are used in labs as they are as pure as you need, typically the resistance of such water will be in excess of 30 Meg and the TDS/TOC will be <5ppm; plenty pure enough for your use. It is widely available in fish shops (As in aquarium) and you will pay around 75p a litre.

Distilled water and the purer double distilled water I would consider TOO pure and you risk stripping your surface. Distilled water is used to purify other liquids, it does this because water by nature wants to be at chemical equilibrium with whatever it is touching and it quickly absorbs things from whatever it is in contact with to 'ballance' itself with it, especialy minerals.

In the same way large amounts of too pure water is dangerous in an aquarium, and indeed for you, it would be a risk on your mirrors also IMO. Water that is pure although not acidic property wise has acid-like behaviour when in contact with anything less pure than it, you can actualy watch it strip things down as it absorbs the minerals from it.

Just my tupence-worth, and obviously there is a little more to it than that, but in a nutshel....

:)[/QUOT

Wow,

Thanks Nem94 :icon_salut:

Ron

Link to comment
Share on other sites
Nem94

Nem94

Posted
Posted
I believe that RO (Reverse Osmosis) water is filtered like De-mineralised water as opposed to being boiled and condensed as with Distilled.

Ron

That's it mate.

These days there is little distinction between the 2. By a RO unit today and it will almost certainly have a DI resin filter in it.

BTW, did you know your share a name with one of the most famous and best ice hockey players ever to play in this country?

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.