24 October 2017, 18:00 | #1 |
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How did they print the white ink onto 3.5" floppies?
I sometimes found myself strangely intrigued by the white ink seen on Amiga floppies, and still do.
There was a flat area of plastic perfect for a paper label, and instead they just printed straight onto the disk! Madness! Does anyone know what machine printed these on? |
24 October 2017, 18:10 | #2 |
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It was some advanced printing for 90s as I never saw any flaws.
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24 October 2017, 18:24 | #3 |
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Me too and by strange coincidence I was thinking about it less than a hour ago when I was looking for an Amiga & power supply to test/fix a RGB->Scart lead... came across this lot while I was cataloging so stuff is easier to find next time...
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24 October 2017, 18:45 | #4 |
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24 October 2017, 18:45 | #5 |
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Probably silk screen printing
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24 October 2017, 18:46 | #6 | |
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Quote:
(Ok maybe not...) |
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24 October 2017, 20:39 | #7 |
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24 October 2017, 20:59 | #8 |
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Or Pad Printing!
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24 October 2017, 21:39 | #9 |
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Last edited by Starglider 2; 24 October 2017 at 22:25. |
24 October 2017, 22:44 | #10 |
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From the Interweb:
"Tampon printing is a sort of "stamping" process whereby the ink is taken from an etched metal plate onto a flexible pad - the tampon - and "stamped" onto the article to be printed. The technique is a good alternative if the surface of the product to be printed, does not allow for silk-screen printing. Furthermore, very small print can be better achieved by tampon printing. If necessary two-color printing can be done in one operation. Printing inks used are basically the same as those used in silk-screen printing; however, the print density of the ink is considerably less." |
24 October 2017, 22:45 | #11 | |
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Quote:
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24 October 2017, 23:17 | #12 |
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Yes, the only drawback is you can only print in RED
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24 October 2017, 23:20 | #13 |
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25 October 2017, 12:34 | #14 |
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It's most likely easier to just stamp multiple disks with the ink than to print labels and stick them on.
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25 October 2017, 13:14 | #15 |
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Anyone know of a method to make this kind of print yourself, e.g. using some transfer method? A low quality print could also be used and then finish it up by hand.
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25 October 2017, 13:44 | #16 |
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chop a potato in half and get carving
I found a welsh company that'll do limited run printed floppy disks - http://www.dischromatics.co.uk/cd-du...k-duplication/ Maybe t-shirt transfer paper? dunno if you'll be able to get the iron hot enough to transfer without damaging the disk... |
25 October 2017, 14:03 | #17 |
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Yeah, I thought about some kind of t-shirt transfer but the usual ironing-method is not something I'd try on any floppy - at least not one that I'd like to be able to use afterwards..
In some car shows I've seen them make their own (vinyl?) decals that they apply before clear coat painting, but I guess they are probably using some special expensive printer to make those. |
25 October 2017, 15:03 | #18 |
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I found https://decalprofx.com a while back while looking into ways to label a control panel with white text. I've never tried that system, so if you do, please post back to let us know how it works!
More generally, you might look into techniques that scale modelers use to make custom decals. A water transfer decal probably wouldn't be ideal for a floppy, but I'll bet it could work if you were careful. Robert |
25 October 2017, 18:13 | #19 |
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What about a simple stencil and water-based spray paint? Or even a solvent-based paint (better finish) with a solvent that won't start dissolving the plastic casing?
Actually, that may prove tricky for those letters and shapes with holes in them... Amigadude does have a point with a potato, though. A decent foam stamper can get a reasonable finish. Works for Emma Bridgwater Last edited by LuMan; 25 October 2017 at 18:14. Reason: tpyo! |
25 October 2017, 20:04 | #20 |
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Well, I'm not after making 1000x of a single print but rather to make a bunch of one-off prints, so it would have to be something that would be quick from drawing to application, i.e. similar to the t-shirt transfer method but without the need for heat. Perhaps to do an ink-jet print on something where the ink will not be able to dry for a little while and then carefully apply it to the floppy surface? It would probably be faint, but then it would be easy to finish it by hand if I only want a simple single-color print.
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