

asafvarlix
Forum Replies Created
-
asafvarlix
MemberJanuary 20, 2020 at 8:57 pm in reply to: Phenoxyehtanol severely changed shampoo viscosityDear jenny,
1. you’re not mentioning HOW MUCH phenoxyethanol you are using.
i know it’s common to use between 0.5%-1.1%. are you using more?2.how much SLES you are using? my experince shows that if you use too little, the formulation is very weak and sensitive to problems such as you mentioned.
-
asafvarlix
MemberJanuary 20, 2020 at 8:53 pm in reply to: Problem with creating a Peeling gel with carbomerHey Dr., thanks a lot. the carbomer which im using lowers the pH to right at the begining. to 2.4, i assume you meant i’ll neutralize it (it’s no hassle…) beforehand….? i can try….not sure if i’ll remain with a clear gel though…
2. i add the carbomer slowly & gradually to the beaker while fast over-stirring it, and then subsequently i homoginze it and continue to stirr it untill it’ll swell and wet (takes about 40 minuts at RT) - so yes, i let the carbomer swell firt.
3. May i ask - what is the advantage of such a concectrated NaOH solution that you proposed? I thought the idea is to increase its overal solution volume - so it’ll get everywhere in the mixer faster- thus entrapping less bubbles.I’ll do try tomorrow the pre-neutralizing method that you mentioned.
and yes, electrolites and carbomer were never friends…that’s why i was surprised when i needed to create this product..i’ll try raising the carbomer -
Dear Perry & Bill, Bill got that precisely right -
Its happening with Cetyl alcohol, stearyl alcohols and stearic acid.What’s the “name” of this phenomenon - should one exist?
-
Gunther, aren’t silicones able to break the sticikness and promote less stickiness- like, anti-foamers, as an example?
-
Nice photos perry, well done!
-
I see Gunther, that is a good idea and ill check it
However - i still want a take home message: how can it be that a lotion that sits for a year on my desk - stable and looking very good- is being separated after 2 weeks in the oven?is it even a good practice to always check lotions in an oven?
can’t a centrefuge tell another story aswell?what is the verdict, lets say, to a lotion that separates in 2 weeks in the oven, but is stable after centrifuge?
-
thanks all - so what you’re trying to tell me is that you definitly saw and worked with lotions and light creams that sat aprox. 2 months at least at an incubator - and barely changed ?
no inner bubbles, no top humditiy forming, the same as inserted (setting aside perfume / color slight changes)what abut the need for humditiy being constant at stability checks?