Syringes ... grrr ...

[Deleted]

The ml markings on my syringes keep wearing off ... possibly am being a messy git and the juice is doing this

... any solutions?

Do the mixing pro's use glass syringes?

[Deleted]

Clear nail varnish, on the outside

[Deleted]

ah, to seal the markings ? Good idea ... more prep work (sigh)

[vereybowring]

I just bought a box of 100 from a medical supplier and throw them away when the seals start going or the numbers fade too far.
Can't readily find where I got them from as it was quite a while ago but it was only about £12 delivered.

[lobeydosser]

If you are covering the markings with clear nail varnish, just give them one quick brush over, then leave that to dry before attempting any further coats.
If you don't then the markings will be disolved by the varnish and, well, vanish!!!!

[Perpetua]

Pipettes can be useful for smaller quantities as the markings are in the plastic . . . though I tend to buy in bulk for syringes, like Verey ( Ebay for me ) then discard when they're done for.

Though I don't measure much, other than the nicotine base . . . everything else I do by eye/drops. Rightly or wrongly.

[Deleted]

thank guys and gals

[Deleted]

Jan 2, 2013 12:07:33 GMT lobeydosser said:

If you are covering the markings with clear nail varnish, just give them one quick brush over, then leave that to dry before attempting any further coats.
If you don't then the markings will be disolved by the varnish and, well, vanish!!!!

You seem very knowledgeable about nail varnish, what's colour do you normally wear?

[lobeydosser]

Jan 2, 2013 12:19:03 GMT @cornersruns said:

Jan 2, 2013 12:07:33 GMT lobeydosser said:

If you are covering the markings with clear nail varnish, just give them one quick brush over, then leave that to dry before attempting any further coats.
If you don't then the markings will be disolved by the varnish and, well, vanish!!!!

You seem very knowledgeable about nail varnish, what's colour do you normally wear?

Once upon a time, a long, long time ago, I was an aprentice B&W Camera Operator in the Printing Trade and amongst the many chemicals we used was Cyanide and Silver nitrate.
These two combined would turn one's finger nails black, so every morning there would be a line up of camera operators all painting their finger nails with clear nail varnish.

It was quite comical if a stranger ventured into that area at that moment.

Och dem were da days!!!!

[Brambles]

I cover the markings with a strip of waterproof sellotape.

However, recently I bought myself some micro pocket scales 200 grams 0.01g resolution and are absolutely great for measuring mixtures. www.amazon.co.uk/gp/product/B007EVUVGQ/ref=oh_details_o01_s00_i00 Not recommending this supplier - just showing the type I bought which just happened to be this supplier. Also bought a 500g 0.1g on Ebay. The 200g has soft buttons and the 500g has hard plastic buttons. I prefer the hard plastic buttons but the quailty of the Amazon sourced one overall is better. The only dislike is the 30 second time out if there is no weight change - have to keep tapping the weigh plate to keep it awake sometimes when measuring. There are some mini scales with a one minute time out which would be better.

[jud]

i just put clear cellotape on, but how long it lasts i dont know because ive only just started doing it

[lobeydosser]

Jan 4, 2013 15:39:27 GMT jud said:

i just put clear cellotape on, but how long it lasts i dont know because ive only just started doing it

I reckon that both the PG and the VG would disolve any glue that is used with sticky tape.

[alvoram]

Do all liquids weight the same amount per ml then? I was under the impression density altered the weight?

[smudge]

Density is really just a measurement of the mass of a known volume of something. e.g. water is generally taken to have a mass of 1g/ml. Oils/organic solvents tend to have relatively lower density so <1g/ml and solutions of sugars/salts slightly more than 1g/ml.

There are some extremes, mercury being the most obvious one - think it's about 14g/ml. Anyway, most liquids have slightly different densities, but the differences are pretty small and the vast majority will be between 0.5 and 1.5g/ml

[alvoram]

Jan 4, 2013 17:14:49 GMT smudge said:

Density is really just a measurement of the mass of a known volume of something. e.g. water is generally taken to have a mass of 1g/ml. Oils/organic solvents tend to have relatively lower density so <1g/ml and solutions of sugars/salts slightly more than 1g/ml.

There are some extremes, mercury being the most obvious one - think it's about 14g/ml. Anyway, most liquids have slightly different densities, but the differences are pretty small and the vast majority will be between 0.5 and 1.5g/ml

Ethanol is another liquid with a big difference to water in terms of weight too... 0.79 grammes per ml I believe.

I guess what I ultimately wanted to know was this, knowing the differences in weights for different liquids, is there really any advantage to weighing liquids as opposed to using good medical standard syringes?