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View Full Version : Ink Chemistry Primer: Dye V. Pigment



Chemyst
April 30th, 2013, 07:37 PM
https://c2.staticflickr.com/2/1497/25309496031_3a20e65a79_b.jpg

cedargirl
April 30th, 2013, 11:51 PM
That's very useful - thanks.
I've read some posts where I think people mistake precipitates in a highly saturated ink for unwanted particulates. Diluting the ink, then testing as above would differentiate these two possibilities.

woosang
May 2nd, 2013, 08:09 AM
Very very interesting

jacksterp
May 2nd, 2013, 09:06 AM
Awesome. Off to get my laser pointer :)

Waski_the_Squirrel
May 2nd, 2013, 05:33 PM
As I read this, I couldn't help but wonder what a centrifuge would do. I have an ancient centrifuge in my classroom.

Chemyst
May 13th, 2013, 12:10 AM
As I read this, I couldn't help but wonder what a centrifuge would do. I have an ancient centrifuge in my classroom.

If you have particulates, you may be able to centrifuge them out. The faster your centrifuge spins, the smaller the particulates you can remove, given sufficient time.

inky
May 13th, 2013, 06:59 AM
This is really neat. Thanks!

Chemyst
March 1st, 2016, 03:05 AM
Image restored. Thanks to everyone who emailed to let me know the link was broken!

naimitsu
March 1st, 2016, 06:03 AM
Very informative! Thank you for sharing, Chemyst!
I think I may be adding the laser pointer test to my ink sampling routine ;)

Chemyst
August 27th, 2016, 04:19 AM
Very informative! Thank you for sharing, Chemyst!
I think I may be adding the laser pointer test to my ink sampling routine ;)

Glad to be of service!

Chrissy
August 27th, 2016, 04:30 AM
Can I assume that all inks labelled as 'pigment based inks' would show particulates?

migo984
August 27th, 2016, 05:20 AM
I previously missed this old thread so a delayed 'thank you' for the interesting information.
Am I correct in assuming that dye-based inks with added glittery bits would be classified as the less desirable heterogeneous solution?

Hawk
August 30th, 2016, 07:48 PM
I'm happy a few people commented on this thread to bring it back to the forefront. This thread should be fixed to this thread since new members will gain knowledge from the information. After all not everyone is a chemist. Thanks again for the information.

Chemyst
September 6th, 2016, 01:10 AM
Can I assume that all inks labelled as 'pigment based inks' would show particulates?

Many will. "All" is a strong word.

Dilution is a factor, as is size of the particulates.

Chemyst
September 6th, 2016, 01:12 AM
Am I correct in assuming that dye-based inks with added glittery bits would be classified as the less desirable heterogeneous solution?

Yes, anything that has physically separate "parts" is different and thus "hetero".

migo984
September 6th, 2016, 02:05 AM
Am I correct in assuming that dye-based inks with added glittery bits would be classified as the less desirable heterogeneous solution?

Yes, anything that has physically separate "parts" is different and thus "hetero".

Thank you for the confirmation.