Ink Definition and 42 Threads

I could swear I saw this topic in the forum in the past but haven't found it today. I was curious how polarization test cards are made to prove that a pair of glasses are polarized. Special ink or paint? What is that type of substance called or commonly used for? I'd love to use it for art. Does...

Hello, I am not sure if this is the right place but I would appreciate some help. Basically I have been trying to accelerate the fading of the ink on thermally printer paper. “Receipts are typically printed on thermal paper, a chemically coated paper that produces text and image when the...

How do we make our own permanent conductive ink for a marker or pen the cheapest, most practical way?

Hello. I was wondering if anyone could help me understand what just happened. I wrote a message ony mug, then microwaved water in it for coffee. I just noticed that a few letters are now duplicated below the message. It kinda looks like some moisture on the side lifted the ink up and ended up...

I’m making an eyepiece that can see hidden messages, and I need to know an ink that you’ll be able to see through the IR lens.

I assumed p(r,t) as p(r,t) = R(r)T(t) as Separation of Variables method. I got the expression of T(t) as T(t) = C1eC2t and got a non-linear differential equation in R(r) as d2R/dr2 + (2/r)dR/dr - (C/D)R = 0 (I assumed r to be the radial distance in spherical coordinates) Now I'm not getting...

Problem Statement: Why does the ink in refill won't flow back if I hold it inversely? Why does the ink in refill won't flow back if I hold it inversely? What stopping it?

I was reading Fundamentals of Inket Printing and it said the following: "The surface tension in a liquid causes a force to act in the plane of the free surface perpendicularly to a free edge in that surface." Can someone explain to me what this means? What's the direction of the force? I have...

I've recently found out about conductive ink and thought i'd make some at home with charcoal. However most guides online always keep using brushes and such and their mix seems to be very low adhesive properties. Therefor, I have two questions. Is there a way to make it more like a traditional...

Hello everyone, I was just wondering if there is any type of transparent ink that could be permanently activated by heat or intense light (laser). Preferably I am planning to use a laser light to activate the ink. I am trying to coat a piece of metal (or paper or etc.) with this ink (which is...

Greetings all, I am quite new to this forum so please forgive me if this is on the wrong thread. I recently purchased some reflective paint which sprays on clear and appears white/silver once light hits it at night. However I am looking for a type of paint that is invisible to the naked eye...

I want to try to use neutral pen and ink to fill with all the gel pen refill But oil-fill plug, what won't and you want to use ink compatible? Oil is the plug at the end pen ink, back or prevent ink evaporation. Google queries to be only lithium ester, but not too much formula

I used Colour markers to write on a piece of paper and pasted the piece of paper on the wall. After a few weeks, I noticed the ink faded, or rather, became very faint that the words were almost illegible. Can anyone explain to me this phenomenon scientifically? Thanks

A student asked if the labs need to be written in pen. Apparently, the lab instructions say to do so. Actually, I forgot that was in there. It’s kind of a hand-me-down set of instructions from ancient times (a few years ago). I should probably take it out, but it's worth a short discussion. The...

I was wondering, a ballpoint pen ink droplet is droped on water, it floats and moves, why? Is it density, viscosity, surface tension or something else. I am pretty stuck

My printer is printing pages with text that has white bars through it (basically the bars are where there's no ink). It's just black text. The text doesn't appear to be faded, and the printer software says the black ink has about 1/5th left and it has a green checkmark indicating it's ok. Anyone...

I want to make homemade metalic ink mixing aluminium powder with some binder.And use it with brush or pen to write some text.So tell me the easiest way , the exact proportions ingridients and way of producing

(I think Chemistry is the best forum to post this) My question is... does infrared ink exist? Also, If you paint your room with a near infrared "color", would you be able to see it differently in a picture taken by a average camera? (just like you can see the IR light in a remote control...

Last month I bought one of those pens which you can rub off your writings with a kind of rubber at the end of the pen. I was so happy because I don't need to use correction pens anymore, so I did all of my maths exercises with that pen. One Friday, my books was very heavy so i left some inside...

I have 3 options; get a new black ink cartridge, refill the one I have, or buy a whole new printer. It's absurd, but the price for all 3 are about the same, as far as I can tell. Am I just looking at the wrong places to get new cartridges or refills, or is this normal? What do you guys do...

Hello I need to remove printer ink from paper, I have been searching for a while and basically I found a formula that suggests mixing aceton, bleach and hydrogen peroxide together in a glass container, when the solution starts becoming hot and bubbling insert the paper into the container and let...

Homework Statement One type of ink-jet printer, called an electrostatic ink-jet printer, forms letters by using deflecting electrodes to steer charged ink drops up and down vertically as the ink jet sweeps horizontally across the page. The ink jet forms 30-μm-diameter drops of ink, charged...

Clever compound cartoon...Dying to figure out the formula to calculate the ink used. There is a strange compound nature to this that I can *almost* calculate. This is just something nagging at me. Take a look at this (IMHO) extremely clever cartoon...

I am a US postagestamp collector. Occasionally a letter will miss the post office's canceling machine and the postage stamp is then "hand canceled" by another person in the sorting/delivery chain by using a ballpoint pen. I would like to find a means of removing the ballpoint mark from the...

I have a friend who is interested in getting a tattoo but of course isn't sure she wants it for life. I tried researching "temporary tattoo ink", like something that last 6 months or so, but I couldn't really find anything. Does anyone have knowledge of a temporary ink? Does it exist? I have...

Homework Statement In the somewhat ‘archaic’ inkjet printers, letters are built up by squirting drops of ink at the paper from a rapidly moving nozzle. The pattern on the paper is controlled by an electrostatic valve that determines at each nozzle position whether ink is squirted onto the...

I observed something odd this evening. When I inverted my ball point pen (writing side upwards-perpendicular to the ground level), there was no change in the level of ink. To my surprise, the ink started coming downwards (towards the open end of the refill) when I wrote with it ( inverted ) on...

I just noticed that a US dollar bill was stamped with red ink. Someone went to the trouble of marking it with "TRACK THIS BILL", "WHERESGEORGE.COM" and an F-clef or bass clef. If you receive a bill, one can enter information about it at www.wheresgeorge.com. Registration is not needed.

I have a book with a green cover. I left it on a window sill in direct sunlight for about a week and now the colour on the exposed side has clearly faded. Why does this happen? Is it something to do with the Ultra Violet properties of sunlight destroying the pignments in the ink?

Hello, I am a graphic arts student attending a class of "New printing technologies", which aims to introduce us to RFID and printed electronics in general from a designer's point of view. However, we have been assigned homework which requires knowledge of electronics and apart from the...

Does anyone know any combination of chemicals or anything which is a phosporescent ink that I could use on a project

dear forum friend i need a help here did anyone have any idea how to remove black printer ink on colouerd paper without damgeing the other colour , if some know what will the best solution for the . help

Homework Statement The particles of an ink blob dropped into a large container of water diffuse outward and obey the radial diffusion equation: dn/dt = (D/r2) (d/dr) (r2* (dn/dr) ) where n(r,t) is the density of ink particles at point r at time t and D is the diffusion constant. Verify, by...

Basic question - How does an rubber ink filler work? (I don't want answers like - there is a vacuum created thus ink fills space and thus... Thats not Physics) Extending discussion : Is it better to press the rubber then dip and then suck and remove. OR To dip then press and suck and remove?

In this case, on the top corner of the book. I occasionally buy some of my books used, and they have stickers and stamps on them. I generally don't mind but this one is on the top of the book when the book is closed (on the top of the page), and it is some ink stamp. I tried removing it...

Homework Statement In an inkjet printer, letters are built up by squirting drops of ink at the paper from a rapidly moving nozzle. The pattern on the paper is controlled by an electrostatic valve that determines at each nozzle position whether ink is squirted onto the paper or not. The ink...

1. One type of ink-jet printer, called an electrostatic ink-jet printer, forms the letters by using deflecting electrodes to steer charged ink drops up and down vertically as the ink jet sweeps horizontally across the page. The ink jet forms 30.0 (mu)m diameter drops of ink, charges them by...

Hello I want know if i put ink point in water cup .. How i can describe ink point motion ?? :rolleyes:

My friends gave me a problem that he said it can be very simple to be proved, but really it is not (to me) There is an ink stain with area of smaller than 1cm2 on a sheet of paper. Prove that there is always possibility you can place a net with square mesh of 1 x 1 cm on the sheet so that not...

Hello all, I would like to know what chemical composition of laser ink is and how to make it? Thank you!

is it possible to read infared ink with human eyes. I have seen lenses for cameras but can't find anything for eyes. If so, where is informaiton on this thakns

Kate spilled black ink on her white dress. Can you turn black into white by changing one letter at a time? Each step must create a valid word in the English language. Kate made the change in 8 steps. Can you do as well ... or better?