As a former chemical analyst, I must advise that LSD is much harder to test for than other substances because there is much less than 1/1000ths of a gram of active substance, and its a big molecule meaning there are even less molecules in this tiny weight.

An LSD blotter is 99.9% paper by weight,. Even the ink weighs more than the LSD.

Most home tests destroy the compound with a mixture of acid and oxidizing agent, and you look at the colour of the smashed up fragments of molecule.

200 millionths of a gram of something shouldn't have detectible taste or colour. You are probably testing the ink on the blotter, or the paper itself.

The only definitive way to know is to send it off to somewhere like energy control in Spain, who you can pay with bitcoin.Ask them to put "TGUK" in the sample name.

You are trying to find out if its LSD (a tryptamine, like psilocybin, DMT) or Nbome (am amphetamine called 2CI, which has a 2-methoxybenzyl bit stuck onto its nitrogen atom, making the 2CI work much better in the same way that the methylof meth makes amphetamine more effective).

I went through a 2C-I phase about 15 years ago, and used to take between 12 and 20mg in water. It tasted disgustingly bitter.

The extra bit stuck on the 2CI makes it 20x more potent. I can always tell a tryptamine hallucinogen from a phenethylamine. Tryptamines tend to be more profound and spritually rewarding, with more visuals like breathing walls and size/distance warping.

Its very hard to kill yourself with a tryptamine. You need to wear thick socks, or your cold toes will give you a miserable trip.

With penethylamines, the trip goes WHOOSH, but has more muscle tension, overeating, sweating, teeth chattering, jaw clenching and eye wiggling (nystagmus). Too much can cause a heart attack, seizure or fit.