kicsiatom
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Remove ink from stamps
Hi people!
I have a big problem...
I'd like to remove ink from stamps, but i dont know what is right chemical which can remove it.
I try to reacting many kinds substances for example
-sodium borohydride soluted in THF
-cc. hydrazine and diluted hydrazine
-king's water
-35% H2O2
-organic solvents (acetone, methanol, pentanol, ethanol, 2-propanol, ethyl-acetate, nitromethane, toluene, benzaldehyde, butoxy ethanol, THF, propane,
xylol, dichloromethane, carbontetrachloride, chloroform, petrol)
-inorganic salt solution (citric acid, NaOH, Potassium ferrocyanide, Potassium ferricyanide, sodium pyrophospate, sodium dithionite, sodium hydrogen
sulfite, potassium sulfite etc.)
But nothing cant remove ink...
Can someone help me, please?
or give advice?
Thank you!
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bbartlog
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So what's the ink, and what is it on? Frankly I find it very strange that you would have access to all of these chemicals, have tried them all, and
yet somehow be ignorant of the fact that knowing what the ink is composed of is the key to answering your question.
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kicsiatom
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We know, the ink which saturated on sponge is odorless, dark coloured, on the paper is black.
The ink can dissolve in water, then it is black coloured, this solution can decolour bleach, peroxysulfuric acid and nascens hydrogen (produce Zn+NaOH
or Zn+HCl!), the bleach and peroxysulfuric acid damage the paper and other paints, the nascens hydrogen cant remove ink from stamps...
The ink can dissolve in ethyl alcohol, then it is dark green coloured.
If this solution reacting with sodium, changes colour to pink, which subside after some days.
The ink cant dissolve in diethyl ether, dichloromethane, carbon tetrachloride, but can dissolve (very poor!) in acetone, then it is yellow and pale
brown coloured...
If the alcohol solution reacting to hydrazine, the solution colour change to blue.
It is interesting, if the ink reacting concentrated base or acid ( H2SO4, NaOH) the ink colour change to pink!
But on the paper, much difficult reacting with something...
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The WiZard is In
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Quote: Originally posted by kicsiatom  | Hi people!
I have a big problem...
I'd like to remove ink from stamps, but i dont know what is right chemical which can remove it. |
There maybe a faster way to life on the wrong side of the bars,
however, I can't think of it at the moment.
Post Office's world wide stay up all night creating inks that
cannot be removed. Not that it hasn't been attempted/done did
in the past.
Noted in passing - In 1891 the state of Massachusetts
required the use of a standard ink.
http://tinyurl.com/3bdq7jb
djh
----
Bin Laden’s Burial at Sea Booo-Hooo
Raises up now the cry – Burial as sea was not in keeping with
Muslim tradition. Ok. You want a tradition favored by the
Religion of Peace, they should have strapped a suicide vest
on him and then used the remains for catfish food.
As an expedient – a half-dozen thermite grenades would have
served. Their placement being optional.
He would still be alive if he had followed my advice —
get a job in a Brooklyn (3 million people) Yemeni bodega. As
Sherlock Holmes said – the best place to
hide something is in plain sight.
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gutter_ca
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Wiz, reread the thread. He's talking about inkpad ink for rubber stamps.
Edited because my spacebar was on vacation..
[Edited on 5/6/2011 by gutter_ca]
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Arthur Dent
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I recall a friend who used benzene to remove the obliteration ink without affecting (too much) the stamp's printing, but that was for monochrome
offset-printed old-style stamps. I don't know how the modern CMYK stamps would fare in that solvent.
Robert
--- Art is making something out of nothing and selling it. - Frank Zappa ---
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The WiZard is In
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| Quote: Originally posted by gutter_ca | Wiz, reread the thread. He's talking about inkpad ink for rubber stamps.
Edited because my spacebar was on vacation..
[Edited on 5/6/2011 by gutter_ca] |
I have a big problem...
I'd like to remove ink from stamps,
Is open to interpolation. [I wanted to use interpretation,
however, my spell checker choked on my spelling and
suggested interpolation which sounds more impressive.]
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food
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I thought that they meant stamps
now that's been cleared up I know that they actually meant stamps
still don't know what's being discussed
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kicsiatom
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I thought: a small adhesive token stuck on a letter or package to indicate that that postal fees have been paid.
Anyways i thought what if i try to react with LiAlH4 soluted in diethyl ether?
Or what do i do to analyze the ink components?
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gutter_ca
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Ha! Guess it's both...
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kicsiatom
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What can i do that i know what is the ink's component?
Or what can damage/remove ink?
Have someone got a idea?
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