I would not like to say about worldwide but I have read that in the uk only pilosibin containing mushrooms will leave a purple print.

I will try and find a reference but I believe it to be true. The blue bruse in conjunction with spore print is supposed to be how a lot of different species were identified. The mycelium also bruses blue this colour is the actives oxidising.

Quote from the enciclopedia of psychoactive plants page 629

I know parts of this book are not 100 percent accurate but I believe this to be true I have read the same information in other publications but can not find references at the mo.

"In order to avoid such mistakes, it is advisable to prepare a spore print when an identification is in doubt. Every mushroom that produces a brown-violet spore print and whose stem turns blue when squee/.ed is a psilocybin containing mushroom of the genus Psilocybe or Panaeolus.

However, the blueing discoloration alone is not a sure sign of mushrooms of the genus Psilocybe or Panaeolus (cf. Stamets 1996**). The possibility of mistaken identity is especially acute with species from the genus Galerina, all of which, however, produce an orange-colored spore print (cf. Galerina steglichii)."

I never mentioned Europe just the UK - i grew up in the countryside and there are no poisenous shrooms that grow in fields that look like L Caps i.e like the pic posted and only a tiny handful that are harmful ( all look nothing like L Caps).

I've found over my many years of shroom growing the best way to make a viable spore print you can store for years is this.

Go out and buy some gaze bandages, I like 4"x 4" but it really depends on the size of the mushroom cap.

Now, while wearing gloves as sterility is key to keeping a viable print. Remove the gaze and keep the the sterile waxed paper it came in.

Using the inner waxed side of the paper, place it on a flat clean surface. Put your desired mushroom cap on the paper and place a glass over this. We want the humidity to rise to encourage the cap to drop more spores.

Leave the glass over the cap for a few hours. Then remove the glass, the cap while being careful not to disturb your work to much.

You now have a sterile spore print that can be used right away or stored for many years.

To store your print take the top half of the bandage paper place it waxed side down on the printed side of the other paper. Use scotch tape to seal the edges then place in a emptied and sterilized film canister seal this with electrical tape and put in the fridge.

If anyone wants me to explain how to make a syringe from that print, just ask.

Hope it helps.