Which characteristic best defines eco-friendly dyes?

The characteristic that best defines eco-friendly dyes is that they are non-toxic and sourced from natural origins. Eco-friendly dyes are formulated to minimize environmental impact and human health risks, which means they avoid harmful chemicals often found in conventional dyes. Typically derived from plants, minerals, or other naturally occurring substances, these dyes offer a sustainable alternative to synthetic options, promoting a healthier ecosystem and reducing pollution.

In contrast, synthetic dyes, while they can be bright and vivid, do not align with the eco-friendly criteria due to their chemical composition and potential toxicity. The cost may vary; however, while some eco-friendly dyes can be more expensive, this does not inherently define them as eco-friendly. Additionally, eco-friendly dyes can achieve vibrant colors comparable to synthetic dyes, making the claim that they produce less vibrant colors misleading. The defining features of eco-friendly dyes focus on their safety and natural origins, which distinguishes them from other types of dyes in the market.