Here is a tidy little graphic from lundphotographics.com. I can't attest to the correctness of the sensitivity info, but if it is correct then the collodion is sensitive to blue and blue/violet with diminishing sensitivity towards the infrared and ultraviolet ends of the spectrum. True UV begins around 400 +/-, so the collodion does not look fabulously sensitive to UV light. The glass of the lens itself may absorb a bunch of UV as well, which would make it even less of a factor. I am not a wetplate practitioner so don't take this as gospel.
Originally Posted by johnielvis