[vandrean]

ketchito said:

@vandrean Not only the amount of Benzalkonium chloride (BC) is a bit low (you can try at least doubling it, assuming you’re using an 80% BC), the manufacturers state that BC shouldn’t be use with anionic surfactants, not only because of imcompatibility issues, but because of that, BC will be “kidnaped” by the anionic, without being able to perform.

natiyo123 said:

BC performance can be affected or even dont work at all if you mix it with other surfactants

Oh well, I will eliminate the BC then.. 

I also tested the other liquid soap that contain no BC with the ingredients below:

aqua
sles 4.28%
capb 2.9%
lactic acid,
sodium chloride
sodium benzoate
polyquat-7
glycerin
tetrasodium glutmatae diacetate
benzotriazolyl dodecyl p-cresol
parfume
mel ~ (and i wonder what is this? 🤔)
pottasium sorbate

And even wihtout BC and smaller conc. of sles, it shows 3 times higher result (71% at 20s for E.coli), where mine is only shows 26% at 20s. 

And because the BC doesn’t work, what can i do to improve the antimicrobial activity? (At least close to the other product)

[vandrean]

Belassi said:

1. That’s a pathetically small amount of surfactant. So, NO.
2. You will have to experiment.
3. Loss of viscosity caused by adding fragrance is a usual problem.
4. No.
5. No. Yes.
6. No idea.
also, sodium benzoate is more than twice as high % as normally used.

Thank you Belassi!
how much should i add the surfactant?

I’ve tried using 10% of sles, 3 ml CDEA and 2 ml CAPB per 100ml, but the foam is hard to get rid of. The foam is keep forming with just a litlle scrub.