28 Oct Is Plant-Based Leather Biodegradable or Compostable?

One of the most common questions about plant-based leather is what happens to it at the end of its life. Will it biodegrade? Can it be composted? The honest answer is: it depends on the material, and on what those words mean. Here is a clear guide.

Three terms that are often confused

• Bio-based describes where a material comes from: renewable biological sources rather than fossil ones. It says nothing about what happens at end-of-life.
• Biodegradable means microorganisms can break the material down into water, CO₂ (or methane) and biomass. On its own, the word is almost meaningless without saying in what environment and how long.
• Compostable is a stricter claim: the material breaks down within a defined time under composting conditions, without leaving harmful residues. Industrial compostability is tested to standards such as EN 13432 or ASTM D6400; home compostability needs separate, tougher tests.

A material can be bio-based but not biodegradable, and some fossil-based polymers are biodegradable. These are separate properties.

Why most leather alternatives are not simply “biodegradable”

Most plant-based leathers are composites: plant fibre, a binder, pigments, a textile backing and a protective top coat. The plant fraction can biodegrade, but binders, coatings and synthetic backings may not, or may do so very slowly. A product is only as degradable as its least degradable component. Designing for durability (a bag that lasts years) and for rapid biodegradation pull in opposite directions.

How to check an end-of-life claim

• Ask which standard was used (e.g. ISO 14855 for aerobic biodegradation under composting conditions, EN 13432 or ASTM D6400 for compostability).
• Ask whether the test covered the complete material, including backing and top coat, or only one component.
• Ask for the percentage degraded and the timeframe.
• Check whether the claim applies to industrial or home composting.
• Be careful with marketing claims: regulators in many markets now require proof for environmental claims.

Beyond biodegradation: other end-of-life routes

For durable goods, biodegradation is often not the most valuable end-of-life route. Others include:

• Longevity and repair: the longer a product lasts, the lower its impact per year of use.
• Reprocessing: grinding offcuts and end-of-life material into new compounds or products.
• Design for disassembly: making it easy to separate the material from hardware, foam and frames.

This is the core of a circular approach; see what circularity means for leather alternatives.

What about Terratan?

Terratan™ is built on plant microfibres from agricultural residue with bio-based binders, giving it up to 89% certified bio-based content, a far more favourable starting point than fully fossil-based PU or PVC. It is designed for circular use, and production offcuts can be reprocessed. Because end-of-life performance depends on the full construction you order, including backing and finish, we share our current end-of-life information with buyers on request so you can make accurate, defensible claims.

Work with Terratan

Terratan™ is Bharat Biomaterials’ plant-based leather alternative, made from agricultural residue and produced in continuous rolls in India. Explore the material, read about our sustainability approach, or contact our team to request the technical data sheet and samples.