In Reply to: Plastic Bag Colour Codes--The Truth posted by Cracker on Tuesday, 27. September 2005 at 19:22 Bali Time:
The theory behind the plastic bags is very simple.....
they buy what ever is brought around to their stalls by the bag sellers, and usually buy whatever is the cheapest...the black ones
And if you really wanted to get technical then you will soon discover that the BLACK ones are very thin and fall apart easily (are the cheapest to buy)and are mostly used for clothing as they are soft and light weight and wont tear through the bags.
the RED ones are made of a heavier (better quality plastic) and items that are heavier/bulkier are usually put in these.
I buy my plastic bags in bulk over there for my shop in aust.