CAUTION

There are more stories (real) that the glue drums attached to the automatic printers often nozzles jammed due to dead rats in the glue.
further the staff use the water with a tin stored in open tanks which has water for days for diluting the glue etc.

Also read below....

CAUTION

One day a girl licked the envelopes and postage stamps instead of using a sponge. That very day the lady found a cut on her tongue. A week later, she noticed an abnormal swelling of her tongue. She went to the doctor, and they found nothing wrong. Her tongue was not sore or anything. A couple of days later, her tongue started to swell more, and it began to get really sore, so sore, that she could not eat. She went back to the hospital, and demanded something be done. The doctor took an x-ray of her tongue and noticed a lump. He prepared her for minor surgery. When the doctor cut her tongue open, a live cockroach crawled out!!!!

There were cockroach eggs on the seal of the envelope. The egg was able to hatch inside of her tongue, because of her saliva. It was warm and moist...

This is a true story reported on CNN.

Andy Hume wrote:

Hey, I used to work in an envelope factory. You wouldn't believe the....things that float around in those gum applicator trays. I haven't licked an envelope for years!" I used to work for a print shop (32 years ago) and we were told NEVER to lick the envelopes. I never understood why until I had to go into storage and pull out 2500 envelopes that were already printed and saw several squads of cockroaches roaming around inside a couple of boxes with eggs everywhere. They eat the glue on the envelopes