Hello, the team recommends the following. The only way to know if
สารกันเสีย selected (type, rate%) is sufficient for any form of infection control is to send a culture test cause because the emergence of infection There are many factors, for example, the formulation [contains natural ingredients, some ingredients that grow well], the production method [process cleanliness, the use of high heat in the production to aid sterilization], characteristics. packaging, etc. from members' questions If a member has just started experimenting with mixing for their own use. learn how to use
Mild Preserved Eco at 1% In the formulation with water-oil binder and select
Phenoxyethanol SA 1% in a water-based formula contains only water. may consider further
สารกันเสีย [eg maybe add
Thyme Kill 0.1% ] and in the case of wanting to produce for sale in large quantities should be sent for a culture test. which the Department of Medical Sciences provides services