----- Original Message ----- From: "Keith Addison" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Monday, December 16, 2002 23:50 Subject: Re: [biofuel] Steel roofing plus other building links -(Was embodiedenergy)
> Hi Hakan > > There isn't any humus in linseed oil. Triglycerides and some other > stuff, but no humus. Once it's dried (or cured - is there a > difference Greg?) it's pretty inert. > I believe there is a difference Keith, but, some of both happens. For the drying part, they lose the volatiles and leave a gum ( like old gas ). When drying oils cures they take up O2, and it is the O2 that is a part of the crosslinking which is ( the crosslinking is the act of curing, not drying ). Certain things can catalyze the process. UV light can speed things up, as can heat. This is a part of why spontaneous combustion is a real fire danger when you have a pile of rags that have been used with drying oils, because the heat of curing speeds up the curing, thus increases the heat, and around you go until the ignition tempature is reached and poof, you have fire. Some types of catalyst ( I think lead oxide is one ) can even make non-drying oils act like drying oils. If you want, I know of a good book at the local library that has good info, and I'll look it up for you. Greg H. Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
