We also recommend:
Lotion : Aquaphor Healing Ointment which can be bought here at Star Crossed Tattoo, or Bepanthen if you are able to acquire this ;)
Soap: Dr Bronner magic soap ; You can find Dr Bronner's magic soap at most health/organic stores in HK.
Hong Kong's finest tattoo and piercing studio
Star Crossed Tattoo | 57 granville rd, 2F, Tsim Sha Tsui, Kowloon, Hong Kong