ink and watercolor

here is the ref picture.

a nice illustration of the way our lungs contrats due to boye's law when we freedive. at -10m the volume of air is already reduced by 50%.

Hi all, not sure this is the right place to ask... mods, feel free to do what has to be done if not.

I'm interested is "stone paper" a kind of paper made out of calcium carbonate (from limestone or construction waste) and HDPE (High-density polypropylene).

It's been advertised as a more eological solution for producing paper as it doesn't requires to cut down trees and uses much less water and chemicals in the process, compared to traditional paper.

My concern in about HDPE (that represent more or less 20℅ of the final product). Most companies advertise it as a "non-toxic biodegradable" plastic. But I can not find any reliable information to back this up.

I'm then inclined to think it is just green-washing.

but still I'm wondering if anyone could bring some insight about HDPE being biodegrade ...

thanks !

a quick sketch, experimenting with ink on etched stone paper.

cross-posted from: https://sullen.social/post/592 https://lemmy.ml/post/2924806

Hi all, how do you manage to sit for long periods of time ?

I'm having trouble staying still after 25/30mn. After that my right leg gets so numb, I've got to move it every once in a while. I'm not sure it really is an issue, but even if I try ti stay focused on my meditation while moving, it's always a distraction. Fyi : I sit crossed legs with my butt on a cushion.

Thanks !

freediving could become a lot more mainstream, but should it ?

Why are some people here on fuckcars still debating on what the best car is ? I mean, most of the time the best car is no car.

edit : that was a genuine question. I wasn't expecting such wrath from car enthusiasts.

Freediving isn't anextreme sport and can be quite safe.

Freediving ins't an extrem sport and can be quite safe.

I’ve got to work on the thin lines. Model can be found here.

A complete training plan to increase your breath hold time. By AIDA master instructor Ian Donald

Model can be found here : https://www.bbc.com/news/world-africa-66118610