On the other hand, chrome-tanning solution is mixed from various chemicals, acids and salts. One of the primary ingredients of chrome-tanned leather solution is chromium sulphate. This chemical helps to prep the leather to accept dyes (these are alsotypically artificial). The color that you see in chromium tanned leather - and this is the standard leather for almost all garments and accessories - is added in the factory. It may contain lead, and sometimes it's sprayed on with spray paint, a notoriously eco-unfriendly substance.
Okay, I'll say it - I'm a control freak, at least when it comes to my leather. As mentioned above, chromium tanned leather is soaked in huge vats of chemicals, softened artificially, and colors are added to the leather in the tannery. This means that when the leather reaches the artist or consumer, the color the tannery added is the last color it will be. No adding colors, no adding patterns... you get what you get. Veg-tanned leather, on the other hand, comes as a light fleshy color. No color has been added, so the artist/craftsperson gets to control the colors, and add pattern (which has long been the signature of my work). Because the veg-tanned leather is closer to the leather's natural state, the colors and patterns are permanent.
I often have customers ask if my leather is "buttery soft" as though a mark of a high-quality leather is thinness and softness, when in fact, the opposite is true. Vegetable tanned leather has a smooth surface but it's far from what anyone would consider "buttery soft". The softening takes time, and you have to break it in, but it will last for a lifetime of use. And, it won't give you or your kids lead poisoning (like some chrome-tanned leathers will). Now, isn't that the mark of a high quality product?