I will be travelling this summer to Berlin and Paris I would like to know if anyone knows about a place where I can find Metol and Hydroquinone, hard to get in my country, and if there are transport regulations regarding them. Thank you very much.
In Paris, you can check with Prophot (http://www.prophot.fr/) 'Produits argentiques'/'Produits'/'Produits chimiques de base'.
In Berlin, I would ask Mirko at Fotoimpex.
You could also contact the guys at http://www.selsdargent.com/ who sell photo chemicals by mail order. They indicate they see the raw materials, but don't list what they have; you have to send them an email to find out. In this way, you could have them send the items to your lodgings in advance of your arrival.
In Paris, you can check with Prophot (http://www.prophot.fr/) 'Produits argentiques'/'Produits'/'Produits chimiques de base'.
In Berlin, I would ask Mirko at Fotoimpex.