Our Materials

(recycled stone & resin) + (heat & pressure) + 
(time & patience) = karst’s stone paper

How is Karst's stone paper made?

Our stone paper is made by mixing calcium carbonate powder with a high quality, non-toxic, non-virgin resin. Heat and pressure are applied, and after many rotations through some extremely large and heavy rollers, the material is thin enough to be used as paper. This is then cut and bound into the notebooks you know and love.

What is Calcium Carbonate?

One of the world's most abundant naturally occurring substances! It's in toothpaste, eggshells, diapers, makeup and even in many medicines. Essentially, it's rock powder. Calcium carbonate is abundant in the earth's crust and on the ocean floor, but we get ours by recycling construction and mining waste and not digging up the earth.

Responsible reuse of scraps

In every factory, there are end cuts that turn into scraps or batches that get damaged. We're able to recycle all of our scraps in-house, using end cuts and other leftover materials to be turned again into fresh stone paper. Since stone paper is degradable and only made of 2 components, when we apply heat, the paper is able to degrade back into the powder it was when it first started, for us to use in further batches of stone paper. This process is very similar to when an eggshell naturally decomposes in nature, just accelerated. Our stone paper holds a C2C Cradle to Cradle Silver Certification.

Recyclability

We'd love for you to fill your notebook with important notes and new ideas that you'll need to refer to for the rest of your life! But we also understand that some ideas don't pan out and some pages may find their way outside of your notebook, perhaps to pass notes along to your friends. If you do have to dispose of your Karst notebook, have no fear! They are completely recyclable! We recommend putting them in your Type 2 stream. Like we mentioned above, stone paper can degrade just like eggshells, so the calcium carbonate can be used as a filler in future products. If any errant pages ended up in landfill (something to avoid but it happens), they will degrade in the sun within 12 months.

 

Have more questions? Check our our FAQ and Certification pages!