I am looking for information on the basic sources for epoxy resins. I read that about 75% of US epoxy resins are manufactured by Shell, Dow and Ciba-Geigy. Are these petro based? I understand that some resins are derived from wood pulp. How do these differ? More "flexible"? Manufacturers make various claims, and I am having trouble sorting out what is what. Jim *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************