I bought some of the high contrast Liquid Light that was intended for use in the Rockland Tintype kits. I too experienced tackiness after 12 hours of drying. Plus it's harder to pour and coat since you have to do it under safelight conditions. If you MUST do tintypes, I'd recommend finding someone who can tolerate the chemicals of the process and have them handle that step for you, instead of doing the faux tintypes.