You know that really chemical smelling stench that you get with new jeans? Particularly black coloured jeans. I want to get the smell out without having to wash the goddamn thing to shreds.
Wear them.
Wash them and then put one of those scented liners into the dryer.
Roll them in shit.
if you wear them for a bit, over time your body will naturally neutralize that smell. then wash with whatever detergent you like
no special technique unless you wanna wash them right away. but id suggest you wear them first so the material is a little worn before you go ahead and wash it to get a better wash
If you don't want to lose the pure black, wash it in vinegar. It helps the dye attach to the fabric and sure as hell takes the smell out of it.