This thread has groooooooown...
Okay, here some information:
Don't be "tricked" by the word Universal. Henkel just kept that expression to make it different from the other versions.
Universal just means, that it is the detergent for WHITES. It has one of the strongest bleaching power as German Consumer reports (Stiftung Warentest) found out in several tests. So I would definitely NOT use it for colored laundry. Black socks will turn into grey within 20 washes. Nevertheless it is recommended to use once on colored items if there happen to be quite tough stains on those.
So there are other versions beside the Universal one: There are:
- Persil Color (all colored laundry)
- Persil Sensitive (for people with sensitive skin)
- Persil Black (only liquid, for black items and Jeans) --> just a marketing gag in my opinion
Moreover there are different "versions" like powder (non-concentraded), Megaperls (concentraded), liquid, Tabs (only Persil Universal) an very new MegaCaps (or liquitabs).
Persil gets reformulated like once a year but at least every 2 years. So it gets other names (anti-grey formula, cold-wash-active, super brilliant-formula and so on). Have a look at the website, I think it is very clear and "tidied-up".
http://www.persil.de