How does octopus make their ink?
921263
I'm not positive, but I suspect it is similar to how most animals synthesize fluids: They have special glands that create the ink from fluids within their system that is collected from food they eat. It is likely a similar process to how a kidney filters toxins from the blood to make urine or how a snake makes venom by synthesizing proteins from nutrients from their food. Our bodies create bile, saliva, and a host of other fluids in the same way - they are generated by glands extracting the necessary components from our blood.
258600
It is a synthetic solution, thicker than normal ink.  Invented by Mr. Biro for use in high flying aeroplanes as the air pressure used to make the ordinary fountain pens leak.  In ancient times, berries and all sorts of other things were used to make colourings which were used as ink in illuminated manuscripts.
156604
I have a couple of new epson printers. \nThe new cx printers are extremely hard to fill. How did you fill them in the first place?\n If you drill or melt a hole in the top, in the EXACT \ncorrect position, and slowly fill them, letting the air\nand ink bubbles exhaust, then, they are "full".\nI weigh the cartridges when new, and when empty, and\nwhen re-filled, so that I know if indeed, they are\nre-filled. You can now buy gram or ounce weight digital scales\neverywhere, including kitchen stores, and retail outlets,\nand they are 20 bucks or so, and very accurate.\n Check the carts to see if on the front, bottom or back\nedge there is a tiny green circuitboard attached to\nink cart with two melted dots of case plastic posts.\n If so, then you have otherwise, a piece of plastic,\ncontaning 35 cents worth of ink, with a self-destruct\nprogrammable chip on it. Every time you use ink, the\nchip is programmed by 7 gold contact points, and the\nprinter "guesses" how much ink you have, and subtracts it.\nAt about 25 per cent to 33 percent full, the chip is\ntold that you are out of ink. This rather full piece\nof plastic, is then DEAD, and cannot be used again.\nI have used a new, FULL cart, and simply run the CLEAN HEAD\nEpson utility a few times, and been told that the carts are now\n50 percent Full ( HALF EMPTY !!! -- and I hadn't printed\nanything yet!!! )\nThe extra caution in telling a cart with ink in, that it\nis empty, is done to prevent the cart from ever really\nemptying, which would suck air into the carriage fill\npost nozzel, and into an inch or two of piping inside\nthe print carriage / head assembly, and in 20 minutes the\nink inside these tubes would dry, and almost permanently\ndestroy the tiny print holes ability to re-wet with any\nnew ink. \n  If you take out a cart, you must either put in a new one\nimmediately, or re-fill immediately. I have seen many \nEpsons in the garbage - all with badly dried print head /\ncarriage assemblies - if you have a SCANNER/ PRINTER, \nsuch as my CX printers, the second the print head is\n"told" by estimation software, that it is "empty" the \nentire machine, including the scanner is DEAD, since,\nwhen you turn it on, you cannot get past the ERROR\nink out message !!!!. \n  The Espon printers with the "new and improved" print ink\nheads and ink carts, are EXTREMELY fragile, and will\nself-destruct at the tiniest problem. If the power goes\noff, and the head is not parked, it dries out. If you\ntake out a cart and go to the store with the cart to \nmake certain you have the correct one, the print head\ndries out. You cannot take out the print head to soak\nit in water without completely tearing the printer apart,\nand removing the delicate microfilm plastic position\nstrip, and the drive belt, and many fragile parts...\n If you do manage to get the print head out, the print head\nis extremely delicate, and ordinary tap water will\ncontaminate the print head holes, and actually\nclog the head worse than the dried ink. Using paper \nproducts with sharp cellulose fibers clogs the heads,\nif you wipe the heads.. ( one webiste uses strips of\ncoffee filters and distilled water, with some success ).\n  The green, self destructing programmable chips on the\nempty pieces of plastic cases, ARE RE-PROGRAMMABLE, and\nprogrammers are available at most decent computer retailers,\nsuch as COMP USA, FRYs, Staples, Business Depot, etc.,\nsince these reputable companies know that the customers\nare being ripped off with being forced to purchase 50\ncent ink carts, that are not even empty, for 40 times the\ncost of manufacture! You MUST make certain that the programmer\nyou purchase LISTS the printer model, or the cart model,\nsince there are dozens of programmers, and Epson keeps\nchanging the programming on new models, so that customers\nare forced to buy only over-priced Epson" carts!\n I am surprised that you state you FILLED an Epson ca
312028
http://en.wikipedia.org/wiki/Inkjet#Technology
87004
It depends on the type of ink used.  HP usually uses ink that is oil-based and takes a while to dry (sometimes it never dries completely).  Epson usually uses alcohol-based inks which work well with velum and glossy papers.
96275
A purple gallinule is purple. Also an octopus or squid can make itself purple by changing it's color and maybe a chameleon too. But if I can only go with one I'll say the Purple Monarch Butterfly.
505634
Go to \n\nhttp://dyesubinks.com/index.php?pageto=printers.htm\n\nIt should answer your question.
1079795
Don't know the specifics of the "spy kit", so I can only guess that the invisible ink you're using is water-soluble.  If so, and the paper has gotten wet, then the ink has bled (wicked) out over the paper, and there is no way to return it to its original state.\n\nOh, sorry about that, Chief. (Do you remember "Get Smart"?)
545525
I think what that means, if I am not wrong, is water that is soluble and can mix with ink. Most pens have this feature, or should i say ink pens. They are not resistant to water so if there is water on paper, if you try writing over it, the ink would still make a mark on the paper instead of being repelled some where or not even made a mark. \n\nIf what I say above is correct then hop down to any stationary shop to grab some ink pens to see how it works.
18106
This is from personal observation.  [Ballpoint] The body of a pen is hollow and contains a tube filled with ink, tapering to an open point.  That open point is plugged with a metal ball affixed in a position where it cannot get quite out of the barrel or into the supply of ink.  However, it can move slightly, and when pressed against a surface and pushed, the ball rotates, and the face turned to the ink is turned out of the pen and deposits that ink onto the surface, while the empty face rolls in to face the ink supply.
1083358
Your wife's right. And not right too. \n\n==========\nbackgournd \n\nInkjets work by squirting ink through very very small holes in a print head. Canon and HP and several others do that by heating the ink in a chamber just behind the hole, which 'boils' a small bit of it creating a bubble, increasing the pressure and forcing out a microdrop of ink. Epson has done it a different way, with piezoelectric pulsing of the chamber behind the tiny hole. \n\n==========\npossible failure modes\n\nThe holes are relatively easily clogged, so the fineness and uniformity of the particles in it (dyes and such) are important. So is reasonable behavior when partially dried out (not being used for two weeks during a vacation, say) and when heated or subjected to considerable pressure. Hence the cleaning cycles built into many printers (see your owner's manual for some vague and normally not very intelligible instructions).\n\nInks made by a knock off artist in some backroom counterfeit lab somewhere aren't likely to have uniformly ground particles, nor probably the required witches' brew of chemicals to behave well under stress. On the other hand, some third party ink producer might indeed take sufficient care to get it right for a particular type of printer / cartridge / etc. The problem in practice to how to distinguish amongst them. \n\n========\nexperimental test\n\nSome printers have the 'print head' built into the cartridge. You get a new set of teeny tiny holes with every cartridge. With other printers, the print head is in the printer and the cartridge carries only ink. Obviously, in the latter case, a poorly made ink can be rather more expensive. \n\nI had a long policy of buying only print head type cartridge printers for exactly this reason. And I was willing to experiment with cartridges and ink from apparently trustworthy vendors because important parts of the printer wouldn't be at risk. I cannot suggest the at home refill policy unless you can do it wearing latex gloves over a slop sink. A couple of cubic centimeters of ink can go a very very long way; you don't want to find out, but the refill kit I used did work, and the cartridges could be refilled three times at least. The very cheapest way to feed the ink monster that I discovered. Not counting the ink spilled on just about everytihint that one time... But, with printers costing less than US$100 nowadays, the cost of an experiemnt gone bad is limited, except for the time and trouble of replacing the printer damaged by the bad ink. \n\n=========\nDRM measures\n\nSome printer vendors have attempted to force their users to do the right thing (ie, buy their expensive ink -- fo rtheir own quality printing good, of course) by including in their printer measures which try to detect improper cartridges and punish the user by locking the printer to some lower performance level or some other punishment. I heard of a printer which self-destructed under when it detected fake ink cartridges., but never managed to figure out which one it was. You many find that your printer won't print any better than some draft quality if you use a third party cartridge. \n\n============\nalternatives\n\nWith the street price of laser printers below US$150 for low end black and white, and under US$350 for low end color (shop around, at least in the US and you'll find them), there are lots of reasons to avoid inkjets, and their expensive thirst for those .cartridges. Unless, of course you need photographic quality with special archival inks, in which case you might have to use an inkjet.
506842
dissolve the ink covering the writing with alcohol perhaps?
806972
try writing it on paper and comparing it with other types of ink you've made or have.
734840
Ink files are created on a tablet pc; according to this site\nhttp://filext.com/detaillist.php?extdetail=INK\nthey can be opened with later versions of MS Word.
242543
Impact Printers  \nWith this type of printer something strikes paper & ribbon together to form a character, like a typewriter.  \nAdvantages: Less expensive \nFast (some types) \nCan make multiple copies with multipart paper \nDisadvantages:   Noisy! \nPrint quality lower in some types. \nPoor graphics or none at all. \n\nTypes of Impact Printers\nDot Matrix   Forms characters using row(s) of pins, 9, 18, or 24 which impact the ribbon on top of the paper. Also called pin printers.\nThe more pins, the smoother-looking the characters.\n\nMost dot matrix printers have the characteristics below:\n\nA dot-matrix y & an enlargement\n \n Bi-directional - prints left to right and also right to left \nTractor feed -  uses sprockets to pull continuous-feed paper \nFriction feed - uses pressure to pull single sheets \nAdvantages:  Inexpensive \nCan do multi-copy forms \nDisadvantages:  Can be slow \nLoud\nGraphics of low quality, if possible at all.\n\nDaisy Wheel   Characters are fully formed on the "petals", like typewriter keys.  \n Advantages:  Best print quality \nDisadvantages:  Very slow - 20 to 80 cps \nOnly one font can be used at a time because you must change out the Daisy Wheel to change fonts.\n\nCannot print graphics.\n \n Chain and Band Printers   Uses characters on a band or chain that is moved into place before striking the characters onto the paper. \nAdvantages:  Very fast\n   up to 3000 lpm (lines per minute) \nDisadvantages:  Very expensive \nVery loud \n \nNon-Impact Printers  \nThis type of printer does not involve actually striking the paper. Instead, it uses ink spray or toner powder.  \n\nAdvantages: Quiet! \nCan handle graphics and often a wider variety of fonts than impact printers. \nDisadvantages:   More expensive \nSlower \n\nTypes of Non-Impact Printers\nInk Jet     Sprays ink onto paper to form characters \nAdvantages:  Quiet\nHigh quality text and graphics. Some can do color. \nDisadvantages:  Cannot use multiple-copy paper \nInk can smear \n\n--------------------------------------------------------------------------------\n  \nThermal    Uses heat on chemically treated paper to form characters. Fax machines that use rolls of paper are also of this type. \nAdvantages:  Quiet \nDisadvantages:  Relatively slow \nExpensive, requiring special paper\nCannot use multiple-copy paper \n\n--------------------------------------------------------------------------------\n \nPage Printer    Works like a copy machine, using toner and a heat bar. Laser printers are in this category. \nAdvantages:  Quiet\nFaster than other non-impact printers, from 4 to 16 ppm (pages per minute) \nHigh quality print and graphics. Some can do color. \nDisadvantages:  More expensive than impact printers \nCannot use multiple-copy paper
726452
None - Cuttlefish have tentacles.\n\nCuttlefish are marine animals of the order Sepiida belonging to the Cephalopoda class (which also include squids, octopuses and nautilus). Although the name suggests it, cuttlefish are not fish, but molluscs.
988235
silk screen printing\ndirect ink printing\ntransfer printing