They have two types of anilines dyes, to be mixed with alcohol, or with water ("agua" in spanish) They can be used to dye any porous material like wood, cork, thick paper, leather of course And yes, their colours are great, although many places don't have all the colours available for sale.
Here are the links:
https://mitiendadearte.com/catalogsearch/result/?q=anilina+
https://www.manosmaravillosas.com/index.php/Anilinas_791/Anilina-en-polvo-al-Alcohol-_9030
http://www.drogueriaboter.es/colorante-de-anilina-al-agua-tagAgrupANILINAA
If you need help with anything, let me know
Sandra