I love this idea! There are a few different labels already, but they only deal with certain products (eg. Vegan Society and Leaping Bunny.) A widely used, universal logo would be wonderful.
The difficult thing is to define what is meant by 'vegan'.
I am quite strict with my shopping - I avoid all animal ingredients including honey, beeswax, additives, as well as palm oil, and I won't buy from companies who test on animals OR whose parent companies test on animals. For example, I think some Dolmio pasta sauce is 'vegan' in that it doesn't contain animal-derived ingredients, however their parent company, Mars, test their products on animals, so I don't buy it. The same goes for a lot of cosmetics. Another issue with some products is the filters used, such as bone char or isinglass, which I try to avoid if I know about it, but I am less strict with that.
I do buy products that 'may contain traces of' milk/eggs. Wherever possible, I will buy from strictly vegan companies, however I am also okay with buying food from companies that make non-vegan items. I see it as a way of encouraging those companies to continue their vegan line, and hopefully expand it in the future.
One way to deal with people's different interpretations of veganism would be to include a rating system on the label. You could use a star rating system or have a thermometer within the logo (the more filled with colour, the better the rating.)
I've noticed that some food labels highlight the non-vegan ingredients in bold, which makes reading labels a lot quicker and easier. I suspect that has more to do with food allergies than catering for vegans, though.
I would love to see the Vegan Safe label on foods like breads, sauces, snacks, drinks... anything that can be hit-or-miss and not easy to identify without reading the ingredients (and even then, sometimes they just list "natural flavours"...) Also everything in the vegetarian section of supermarkets, because some mock meat & cheese is not vegan, and even some veggie patties and flavoured tempeh have egg or honey. Another useful one would be medicine and vitamins, because as you mentioned, some have gelatin caps, and also animal-derived vitamins. Most pharmaceuticals are tested on animals though, so it's a tricky one. If you're going to include cosmetics, it would be great to have labels on some common items like razors, face wipes, toothpaste, etc... I don't think I've seen any bunny logos on those types of items.
If it's going to be a straight yes-or-no label without ratings, I think the following would suit the majority of vegans (from what I gather, anyway... correct me if I'm wrong!)
- no animal ingredients
- no animal testing
- no palm oil unless ethically sourced
- traces are okay
- judge individual companies, not parent companies
Thanks for putting in the time to help us all out, Mark!