(MENAFN- GetNews) 1. Ordinary indirect dyes (N), such as dark green NB, dark brown NM, etc. Ordinary indirect dyes originally used benzidine as the two-head body, which has now been banned, and now ...

Add Yahoo as a preferred source to see more of our stories on Google. Testing for colorfastness is simple and can be done using items you already have in your home. Getty Images / Kyryl Gorlov If ...