Polythene porosity ?

For biological material in a sealed polythene bag but in surface contact with the polythene, is there any possibility of any
cellular material migrating, in picogram terms, through the polythene sheet.?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.