Old Filter paper

The site killed my long post! the pics were too many! So I will split it into parts. (seriously 8mb limit!!) in 2018!


Anyway watched a bunch of old filter paper on ebay for weeks, there was also some chromatography paper. The pictures made the paper look old and crap, no one brought it and the price seemed high.

So after a few weeks i contact the guy, i offer a super low price and he accepts it! The stuff turned up today.

pleasant surprise, there are a few stains on the wrappers, but the paper itself is in perfect condition, not only that but some the boxes still have the original seal!

Some of them are hand made and all are in excellent condition, no idea of the age, but to me they look pretty old!

Anyone got a guess at the decade?

I will post the pics in several batches because of the size limit.

the opened ones i will use and keep the sealed ones for my museum of old shit

some more

I love the fact some still have the proper seals, it surprised me the paper itself is still in perfect condition.


[Edited on 5-1-2018 by NEMO-Chemistry]

sorry so many posts but the size limit is a pain!

The chromatography paper will be handy! I have alot of TLC plates, but sometimes a quick TLC on paper saves using the more expensive glass plates

There is loads of it! I will use some later for the coffee extraction.

Some has a really nice feel to it.

The glass fibre paper picture didnt come out well, these are nice small circles that seem very thick and fine in particle size.

Quote: Originally posted by NEMO-Chemistry

There is loads of it! I will use some later for the coffee extraction.

Quote: Originally posted by j_sum1

Quote: Originally posted by NEMO-Chemistry   There is loads of it! I will use some later for the coffee extraction. There's an irony: using lab paper as a coffee filter.

That didnt occur to me , some of these are much finer than coffee papers and they were cheaper.

I got new 250ml sintered funnel hat was silly cheap, but the pore size is a bit big. So i might use some paper on top of it.

Most the boxes are still factory sealed which also appealed.

Quote: Originally posted by aga

Nice find ! Try reducing the photos to 400x400 or something like that. It reduces the size drastically, and tends to make them display the right way up. I'm on Ubuntu and use ImageMagik to reduce the size.

Quote: Originally posted by aga

Once you get some extract, try adjusting the pH CAREFULLY (it is very very easy to overshoot) then give the solution some time. Some stuff will fall out at a different pH to others.ducing pH, mak Edit: In Practical terms (based on the maths et al that blogfast25 taught me) that means having x10 different acid/base concentrations to decrease/increase the pH with. As you see a change in pH, swap to a x10 weaker solution to add for the next adjustment. E.g. if you're Increasing pH with some NaOH solution, make up a 1[M] solution, and 0.1[M] and a 0.01[M] even a 0.001[M] if you really want to hit the spot. In an amateur setting, just make the 1[M] solution, take 10ml of that and stick it in 90ml of water to get 0.1[M], then repeat to make the rest. [Edited on 5-1-2018 by aga]

IIRC, buffer solutions are the way to go for calibration. On Amazon and Ebay they sell little packets of powders that, when dissolved in a fixed amount of water, form a solution of the desired pH. I believe they used a phosphate buffer for the 6.86 buffer solution, but I forgot the composition. The 4.00 buffer solution used hydrogen phthalate salts along with phthalic acid to make the desired solution. Let me see if I can find that bookmarked resource I have.

EDIT: Aha, found it! 0.477 mol of sodium dihydrogen phosphate and 0.523 mol of sodium hydrogen phosphate in 900 mL and top off to 1 L. You can scale it down of course (this 6.86 pH). That is, if you can get the salts .

[Edited on 1-6-2018 by ninhydric1]

Quote: Originally posted by ninhydric1

IIRC, buffer solutions are the way to go for calibration. On Amazon and Ebay they sell little packets of powders that, when dissolved in a fixed amount of water, form a solution of the desired pH. I believe they used a phosphate buffer for the 6.86 buffer solution, but I forgot the composition. The 4.00 buffer solution used hydrogen phthalate salts along with phthalic acid to make the desired solution. Let me see if I can find that bookmarked resource I have. EDIT: Aha, found it! 0.477 mol of sodium dihydrogen phosphate and 0.523 mol of sodium hydrogen phosphate in 900 mL and top off to 1 L. You can scale it down of course (this 6.86 pH). That is, if you can get the salts . [Edited on 1-6-2018 by ninhydric1]

I might buy the packets then
Thx for that. just tried filtering the coffee! No idea what pore size the filter is but its really coarse!!

So looks like i am cutting filter paper out to fit the funnel lol.
I am off to bed, i hope to get the website online soon, then you can all see what i am upto with the coffee .

You can get the packets on Amazon. For $10 you get buffer solution packets for pH 4.00, 6.86, and 9.18.
Link: https://www.amazon.com/15-pack-Buffer-Solution-Accurate-Cali...

Unless you have an extremely accurate analytical balance, making extremely accurate buffer solutions are difficult. You could try , but you would also need a source of sodium hydrogen phosphate, also known as disodium hydrogen phosphate.

Quote: Originally posted by ninhydric1

You can get the packets on Amazon. For $10 you get buffer solution packets for pH 4.00, 6.86, and 9.18. Link: https://www.amazon.com/15-pack-Buffer-Solution-Accurate-Cali... Unless you have an extremely accurate analytical balance, making extremely accurate buffer solutions are difficult. You could try , but you would also need a source of sodium hydrogen phosphate, also known as disodium hydrogen phosphate.

Quote: Originally posted by unionised

Quote: Originally posted by ninhydric1   You can get the packets on Amazon. For $10 you get buffer solution packets for pH 4.00, 6.86, and 9.18. Link: https://www.amazon.com/15-pack-Buffer-Solution-Accurate-Cali... Unless you have an extremely accurate analytical balance, making extremely accurate buffer solutions are difficult. You could try , but you would also need a source of sodium hydrogen phosphate, also known as disodium hydrogen phosphate. I calibrate my pH meter with a saturated solution of borax (9.32) and a saturated solution of cream of tartar (3.56) . Why would I need a balance?