Originally Posted by gza
Most black jeans have traditionally been overdyed, meaning both the warp and weft fibers are black. That is why for most black jeans, the outside and inside appearance of the fabric is identical. For blue jeans, only the warp is dyed, while the weft is left either natural (ecru) or bleached white. The contrast between the two colors accounts for a lot of the characteristically attractive aging of blue denim. Most black denim lacks this potential and will instead age into a lower contrast, washed out appearance. That said, a few producers make black jeans in which only the warp is dyed. I own a pair myself, from Varvatos, but unfortunately they will not age like blue denim either, because the dye itself seems incredibly resistant to bleeding or fading.
Kinda a few misconceptions here I think.
Overdyed is when the woven fabric- regardless of what colour the thread are - is dipped in dye..... Just having both warp and weft the same colour does not mean it "overdyed". - PBJ 007 has all indigo threads, its not indigo overdye.
Loads of brands make a black warp- non black weft jean - its not exactly rare.
Indigo is very unfixable and doesnt hold onto fibers very well- this is exceptionable- blacks and other colours hold very well and just look naff as they wear as the dye doesnt really wear off but just gets worn and dull...
More companys should experiment with overdye and also using weird weft hues - like JR.