Silver stuff on lottery tickets?

Question

What exactly is the silver stuff that you scratch away like on lottery tickets and stuff? Like, if anyone knows what it's made of, that would be helpful:)

Answer 1

There are two methods used to make the protective coating applied to a lottery ticket.

One method uses a heavy-coverage ultraviolet-sensitive ink (varnish). A layer of ink is applied to the area on the ticket to be covered, then it passes through a UV curing stage. This is repeated several times to make a suitably thick coating. The varnish is designed to cure somewhat soft, so that it can be removed by scratching. This process is performed at the production speed of a multi-colour printing press - thousands per minute.

When some form of pattern or variety of colour is desired, a thin layer of foil is used instead. The foil hides the ticket contents somewhat better than the varnish, but is more

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