"Natural dyeing" refers to the process of coloring fabrics or materials using dyes derived from plants, minerals, or other natural sources instead of synthetic or chemical dyes. Full definition
So protect your little guys from this stuff, and look instead for certified organic toys that are 100 % non-toxic with natural dyes from plants and minerals. (mindbodygreen.com)
Create your own spring color by using natural dyes and pigments from the landscape. (marinwaldorf.org)
What makes the brand distinctive is hand painting and the use of natural dyes. (tissura.com)