I like lagirls answers, but I’m going to add more (and there may be some repetition, since I’m not looking at her answers).
1-which current devices give the best results?
You will get different answers from electrologists who use different modalities, techniques and epilators. For example, it’s been said that galvanic (properly done) is more effective the first time than other modalities, but it’s slower than all others. I believe that the results are practitioner related - that all current devices (modality, technique and epilator) will give the best results if the electrologist is performing the treatment correctly for that device.
2-are there different type electrolysis machines maybe?
Oh yeah. There are old epilators that use transistors and new epilators that use computers and digital technology, plus there is now an epilator that uses 27 MHz vs. 13.56 MHz frequency.
3-what are the approximate prices(per minute?) for london area?
No answer here, but think about this: Comparing the charges of different electrologists doesn’t really tell you who will be less expensive in the long run.
4-possible temporary/permanent side effects?
Temporary side effects include redness and swelling - much like that of a mosquito bite. This subsides quickly or within a few hours. Some people will have the tiny scabbing - most often seen on the body, and some types of skin will have some post-inflammatory hyperpigmentation. This usually fades with time. The permanent side effect is the loss of hair.
5-how many sessions are needed to kill one hair?
Under the best circumstances a treated follicle will never grow another hair. The best circumstances include the following: hair is in the anagen stage; skin is properly hydrated; and the insertion and current application was perfect.
6-delay between sessions?
Depends…How much hair? What methods of removal used prior to treatment? How fast do you want to get it all done? Clearing an area as soon as new hairs are seen is best, but not always possible.
7-how to choose a good electrolycist?
Interview a few. Get some short treatments and compare them. Are you comfortable with the electrologist? Is the office clean? Compare the sensation of the treatment. Painful insertions are not a good sign, but the current application might sting - painful removal of the hair is not a good sign - it’s a sign of tweezing, however, you might feel some traction on hairs in catagen or telogen - so weigh it all out.
8-shorten the hair without completely killing it. possible?
No. If piece-meal destruction occurs, then the hair will most likely head back to it’s heavy state with time.
9-anything else important?
Pre-sterilized and disposable needles. The electrologist sterilizes the forceps/tweezers and the tip used to hold the needle in the cord. The electrologist washes hands before gloving. If the electrologist stops to answer the phone they rewash and glove again. Good lighting and magnification are rather important.