oui comme tu dis. Je pense que c'est lier au fait qu'il s'agisse a l'origine d'un matériau utilisé pour la botanique.
Voici quelques infos pour les curieux. Après chacun prêche pour sa paroisse c'est certain.
Mais si il y a des intéressés je peux vous fournir via MP le shop anglais chez qui j'ai acheter
The Material
Epiweb consists of a plastic material that will not decompose and that will always keep itself moist and free from substances which could harm roots. Epiweb is 100 % Toxic free and are made of 70 % recycled plastic.
It is avaliable in several designs, for planting in pots and as slabs. The material is also avaliable in larger plates for use as background in glass display cases etc.
Technical information
· Material description - Polyetylentereftalat (PET)
· Waterkeeping ability - 76% of its own weight
· Salinity/conductivity - 0,01
· pH-value - Neutral 7,0
· Colour - Greyish black
· Weight - 97 g/litre
· UV-resistance - UV-solid
Epiweb
· Is pH neutral and non-decomposing. Has a low salinity and easy to rinse.
· Has a repelling effect on snails, becouse of the coarse material.
· Is easy to plant in and makes the plant stand steady in the pot.
· Doesn't float and is therefore easy to water.
· Protects roots in block cultivating (roots grow inside material instead of on top of).
· Prolongs time to reeplant (no replanting due to decomposed substrate).
· No disturbance of the plant while exchanging decomposed substrate.
· Natural appearance, very close to real Dicksonia.
· Suits all epifytics etc
· Could be mixed with every kind of substrate or used as the only material.
· Light, therefore low shipping cost and maintains its qualities for a long time.
· Creates a microclimate around roots with lots of oxygen and moisture.
http://www.epiweb.se/gallery.htm