Infrared glasses to read invisible ink

I need a kit of lenses (IR? UV?), pen and invisible ink to make magic tricks to my friends. I have seen people selling it to cheat in poker cards, but for its nature that trade was secret, expensive and probably illegal. I need instead something cheap and safe. My budget is 50 euro.

It is expensive, yes, but not illegal. I do not endorse the site or know anything about it.

I am using infrared contact lenses to see invisible ink for playing cards . It is really helpful for me. I bought the infrared glasses from spy cheating playing cards in Delhi. I use this trick and won many games in casino . i think this contact lenses work on whit paper too. I will surely try this and let you know about this .

you can buy high quality soft contact lens from rsjk spy cards shop. They are good dealers of customise contact lenses and spy invisible playing cards in Delhi

I don't think any lenses would make you see IR or UV. It's more probably polarizers.

But I'm interested to know !

Do you prefer contact lenses or glasses and why?

What are the best toric contact lenses for dry eyes?

Where can I buy contact lenses?

What are the best recipes for invisible ink marked cards?