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I still have a couple of Invisiclues hint books. I wonder if the special markers are still available and if they would still work on these old books.
by JoeDaDude 2y ago
I still have a couple of Invisiclues hint books. I wonder if the special markers are still available and if they would still work on these old books.
- ghaff 2y agoThere were a couple of standard "invisible inks." [0] I assume Invisiclues used one of them--most likely baking soda given they didn't use heat to reveal. No idea how stable either of those were as inks. [0] https://www.chem.ox.ac.uk/files/secretstoppers1pdf https://www.chem.ox.ac.uk/files/secretstoppers1pdf
- zzo38computer 2y agoI think that Invisiclues is good idea, and that UHS format can be used as a computer file with a similar use. There are FOSS implementations of UHS such as OpenUHS and FreeUHS. Maybe someone will be able to rewrite the Invisiclues in UHS format. (I also wrote a UHS writer program in uxn. And, I had written UHS parser in PostScript; if you have printer with invisible ink (or scratch-off layer) then maybe it will be possible to use this PostScript code to make a program that will print out with invisible ink, too.)
- autoexec 2y agoIt might be the same as the markers found in these "Yes & Know" books: https://www.amazon.com/Lee-Publications-Invisible-Know-8-88/dp/B000IMT3PS https://www.amazon.com/Lee-Publications-Invisible-Know-8-88/...