Rein has just posted Tsachilas chicas from 1968 - http://www.columbusmagazine.nl/zuid-amerika/ecuador/noordelijk_laagland_en_kust/reisreporter/fotos/455850.html
Here we see tsachilas children from now., Their clothes are much brighter. I can imagine the dyes in Rein's time were from plants, natural and now synthetic. Although the weaving is still done by hand in the commune. Most children now go to school, I dont think it was like that in Reins time. That it one of the reasons that it is hard for the Tsachilas to keep their culture , the young want education and often that means movign away to the cities.