[mmarr]

thanks everyone, after few days, the viscosity increase back. i think it really need some time to settle down and achieve the viscosity

[mmarr]

thank you @Abdullah and @ketchito for the reply. i had tried with salt but it apparently doesn’t make much different.

[mmarr]

ohh thank you, btw is glycol stearate can cause instability? as far as i know, it usually can act as co emulsifier.

[mmarr]

we are trying to figure out the root of the problem. is it really the formulation unstable or processing. cause when we did in small batches in lab, apparently, no issue.

[mmarr]

there are only water soluble active, they only thing i susppected is either the process or do you think fragrance can cause instability? we put 0.1% only. we do have carbomer as thickener and EGMS as pearlizer/co emulsifier.

[mmarr]

we suspected it during processing. maybe not enough time for thickener and active bind together. not sure if it right

[mmarr]

okay, will check on it. thanks @mikethair

[mmarr]

no, not yet coz in the lab, there is no separation. Can it because of the processing issue?

[mmarr]

we do actually tried to test the visco using same temperature. still a lot of different.

[mmarr]

do u mean that the sequences also play a role for the visco? btw, im using flakes version for peg-150

[mmarr]

i see, thanks a lot for the help 🙂

[mmarr]

sorry, if you dont mind, can u explain how to do coacervate test?

[mmarr]

aqua- q.s

edta-0.1

glycerin-1

peg-150 -0.5

carbomer-0.3

glyceryl distearate(pearlizing agent)-0.5

lauryl betaine-8

lauryl glucoside-4

sodium cocoyl methyl taurate-4

sodium cocoyl isethionate-4

dimethiconol & TEA-3

PQ10-0.3

Preservative

[mmarr]

this one actually mixed solution with dimethiconol. I used BRB 1018.

[mmarr]

oh i see, so, means that its not really help for rinse off formulation. thank you for the response

[mmarr]

because i think percentage of olivem 100 i out in the formulation not enough, and adding peg-100 stearate to increase stabilization and also trying to reduce cost.

[mmarr]

coz actually, i can get nice emulsion when combining this two. no issue so far with separation, just the viscosity issue

[mmarr]

can i ask details differences between ethoxylated and non-ethoxylated?

[mmarr]

but olivem 1000 and peg-100 stearate & glyceryl stearate both are ethoxylated/non-ionic emulsifier right, should be compatible

[mmarr]

have you try using same formulation using CAPB and one more replace with lauryl betaine? I had tried several time, the result still shown that using CAPB the viscosity higher compared to lauryl betaine.