Question for Emulsion Engineers

Mustafa Umut Sarac said:

Some young people uses fluorescent dyes to tattoo themselves. I heard one guy ordered a skull tattoo to his face and when he goes to disco , everyone sees the skull on his face under ultraviolet light

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Photo Engineer said:

IDK what the dyes were. I do know that they were rare earth complexes that were colorless under visible illumination. There was a tiny amount of image due to ambient UV, but when we turned out the room lights and turned on a fluorescent lamp directed towards the paper, it came alive like a flat screen TV in an age well before such devices.

At that time, we were working on metallized dyes for image stability and did get a whole series that were based on nickle complexes which is another story completely. In this case, a magenta dye would turn into a cyan dye upon contact with a mordant and a nickle salt. Thus, we proved that magenta did not exist!

PE

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falotico said:

It is wonderful to have access to the experts from Kodak. This fluorescent image that PE mentions would have been fascinating to see. If it was a dye-transfer image then Frizza could acquire a dye-transfer relief matrix some way and simply use it to transfer a fluorescent dye onto print paper. You could try it with fluorescein dye which can be bought online in various forms. Fluorescein looks like it is a basic dye so it might require a mordant on the print paper in order to transfer well--perhaps chrome alum? Other fluorescent dyes include Rhodamine which comes in two forms, one of which is available in art stores. You might also use a dye-toning method to create a photographic image in fluorescent dye, cf. J.S. Friedman "History of Color Photography." If Frizza is really interested in fluorescent images he might find it easier to start off with the materials commercially available than try to find compounds made of rare earths.

Try drawing with the dyes also. This will give you a sense of what the fluorescent images look like.

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jnanian said:

hey umut

i think that was an episode of the x-files ( a long running conspiracy based tv show )
fox and scully were investigating radioactive tattoo inks which were
mined deep in russia, and deposited by aliens
i can't remember how the show ended up, except for the smoking man smirked
and chrizchec's eyes looked all black.

no disco's just scifi fun

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