I'd like to keep the paper's current color, and prevent it from changing over time when exposed to ambient light. The paper will be removed from the box and brought into ambient light without processing.

Would fixing the paper w/o the bleach component work? If so, is color fix available separately from the usual "blix"? Out of curiosity, and because it was on hand, I tried this with B&W fixer, but the color was stripped away.

Would the ability to "fix" the color depend on the type of paper itself? I have both pre-RA4 and current-process papers of varying ages.

Can't imagine anyone has had reason to actually try this, so any advice, information and suggestions would be much appreciated!