Nylon is plastic and is not natural nor biodegradable
Nylon is a form of plastic which no matter how you spin is not intended for any sort of human consumption. Unfortunatly there is no hard research on nylon food grade materials including the nylon mesh used for rosin bags (this is not a good thing). What I have been able to find is a study done by Nathalie Tufenkji a Professor of Checmical Engineering. The study was on the nylon mesh tea bags which have become more and more popular due to the easy clean up.
What was found:
at brewing temp 95c nylon mesh tea bags (food grade nylon material) releases approximately 11.6bn microplastics and 3.1bn nanoplastics (these are 150 times smaller than hair possibly small enough to permeate human cells). These microplastics and nanoplastics are made up of nylon and polyethylene terephthalate (PET)
Polyethynlene and Nylon do not release BPA or Bisphenol A however they do release non-BPA chemicals that disrupt hormone activity. Most plastics release Estrogenic chemicals sometimes BPA free products release more EA than the products containing BPA do.
Words to remember - Bisphenol A, Endocrine Disruptor, Endocrine-disrupting chemical, Estrogen Receptor Binding, Estrogenic Activity and Plastic.
Checmicals that mimic or antagonize the actions of natural occurring estrogens are defined as havign Estrogenic Activity (EA) which is the most common form of endocrine disruptor activity [Integragency Coordinating committee on the Validation of Alternative Methods (ICCVAM) 2003, 2006; Natural Research Council 1999]
Chemicals having EA can produce many health-related problems, such as early puberty in females, reduced sperm counts, altered functions of reproductive organs, obesity, altered sex-spesific behaviors, and increased rates of some breast, ovarian, testicular and prostate cancers (Della Seta et al. 2006; Gary 2008; Kabuto et al. 2004; National Reasearch Council 1999; Newbold et al. 2004 Patisaul et al. 2006, 2009)
Boldt Bags do not offer purely silk screen bags all of there bags are silk screen nylon and have nylon stitching.
Alibaba silk screen rosin bags are also made of nylon silk screen or silk screen nylon
Korlor420 is the only Company who makes all of our bags from 100% Silk
We offer French Silk as well as Silk Screen (not to be confused with nylon silk screen)
Just a little food for thought
Much love always from the Korlor420 Family to you