Does it have to be waterproof?
These sites talk about food safe oils, but they are all in relation to finishing surfaces that may come into contact with foods (like tables). None talk about oilcloth in relation to food storage.
I found this site that address linseed oil and food safety. It was opposed to linseed oil as a food safe oil:http://www.naturalhandyman.com/qa/qalinseedoil.shtm
This site recommends using tung, walnut or mineral oil as food safe:http://www.canadianhomeworkshop.com/...g_finish.shtml
This place in the UK has a chesnut food safe oil.http://www.axminster.co.uk/product-C...Oil-377292.htm
And this is tung nut oil which is FDA approved food safe:http://www.realmilkpaint.com/oil.html
This site is about oilcloth (but I do love the moscowfood article).http://www.codesmiths.com/shed/works...ques/oilcloth/
This place has oilcloth and says oilcloth is made with linseed oil and does not recommend machine washing. But it doesn't say their oilcloth is made using linseed oil...http://www.wilshiregardenmarket.com/...tablecloth.htm
More oilcloth from Mexico:http://www.mexicansugarskull.com/mex...Site/index.htm
On the combustibility of cloth soaked in linseed oil:
"I would like to mention again that linseed oil appears to very prone to
spontaneous combustion under various circumstances. Even though most oils are flamable, the spontaneous combustion issue is very different. And
although most oil soaked rags need to be disposed of carefully, linseed oil
soaked rags are exceedingly prone to spontaneous combustion,i.e., rags
soaked with linseed oil can rapidly build up enough heat to self ignite!
Many reports and fire investigations have found rags soaked with linseed
oil and linseed oil containing products to have been the source of fires that have caused great destruction and killed many people."
So I was reading about sprouting and they recommend flax or hemp cloth for sprouting bags because they don't mold like cotton, and it made me think about these lunch bags. Do they have to be waterproof? The only things I put in lunches (in bags) are sandwiches, tortilla chips, and homemade baked goods. I'm not sure they need to be waterproof...