Strange! Can't read the pH lever

Formulating

Strange! Can’t read the pH lever

Posted by Anna on May 28, 2015 at 10:59 pm

HI every one

I use pH strips for many formulas( i know i use this pH strip is not exact, but it still can work)

This is the first time when i tried 4 different pH strips for my new formula (different levers) and none of them change any color. is any one know what’s wrong?

Thank you!

Anna replied 8 years, 11 months ago 5 Members · 10 Replies
10 Replies

ozgirl

Member
May 28, 2015 at 11:13 pm

What is the type of formula?
Anna

Member
May 29, 2015 at 12:18 am

hi @ozgirl

the formula if for whitening+Anti Acne cream

here is the formula;

Distilled Water          50.450

Aloe vera powder 200:1      0.280

Xanthan Gum            0.300

VITAMIN B3 NIACINAMIDE 5.000

JOJOBA OIL    4.000

Capryloyl Glycerin/Sebacic Acid Copolymer          4.000

Caprylic Capric Triglycerides           2.000

vitamin e natural     1.000

C12-15 Alkyl Benzoate         4.000

Stearic Acid : 1

Cetyl Alcoho :2

OLIVEM 1000            6.500

Burdock Root [4:1] Powder 1.250

white willow bark(16:1)      0.500

Allantoin         0.500

Sodium-L-Lactate      3.000

Bearberry extract     6.000

Phenoxyethanol        1.000

citric acid        0.220
Chemist77

Member
May 29, 2015 at 4:15 am

Looking at the formula I suppose the pH is in an acidic range where the strip is not registering a color change and it doesn’t look like a w/o emulsion too. Or make 10% aqueous solution of your lotion and try measuring the pH.
belassi

Member
May 29, 2015 at 2:35 pm

Probably it is already at pH = 7 near as dammit.
Chemist77

Member
May 29, 2015 at 4:41 pm

Guess @Belassi has a strong point, I bungled up between acidic and close to neutral.
OldPerry

Member
May 29, 2015 at 5:02 pm

If you are serious about formulating it is well worth getting yourself a pH meter for more accurate measurements.

They aren’t even that expensive and are well worth the investment. Here are some examples.

http://amzn.to/1EENu9z
Anna

Member
May 31, 2015 at 11:40 pm

Thanks every one.Yes as @Belassi, the pH is neutral . any one suggest What is the best pH range for a Brightening cream?

@Perry, i just ordered a pH mete already, should have it in next some days.

1 more question, what is the normal viscosity for a cream formula ?

Thank you !
OldPerry

Member
June 1, 2015 at 3:07 pm

The viscosity of a cream formula depends on what you or your customers want.

The range can be anywhere from 15,000 cps to 40,000 cps. It really depends.
belassi

Member
June 1, 2015 at 5:18 pm

What counts is the sensorials. Viscosity by itself is a primitive measure.
Anna

Member
June 3, 2015 at 11:25 pm

Thanks @Perry and @Belassi

Strange! Can’t read the pH lever