How to see invisible ink without a blacklight?

It is said that people can use a backlight to see invisible ink marks hidden marked cards. How to see invisible ink without a blacklight?
Many poker players have heard marked cards with invisible ink could be seen by infrared contact lenses poker or marked cards glasses. The magic secret in poker fields, even magic show performance has been spread.
Actually, theses situation does not exist. But we need to get the help of marked cards invisible ink contact lenses to see thorough invisible ink markings without a blacklight.
With these secret cards tricks, no matter what kind of light, you can see invisible ink marks clearly and work better in poker games or perform well in magic show!