Re: basic lotion mkg questions

[Guest guest]

>I have been using two metal pitchers for my small lotion

>batches I have been making. Now I find in my saved info that

>stainless steel is recommended. Is this necessary?

Stainless steel and glass (Pyrex type) is best. Aluminum will corrode with

acidic formulas.

>I am finding that there are references to heating

>phase A and phase B to 80C, then combining. I also found reference

>to heat to 80C and hold this temp for several minutes. What would you

>recommend?

If you are uncertain about the microbial integrity of your water or your water

phase contains lots of organics that may be contaminated, you should hest to 80C

for several

minutes.

Maurice

--------------------------------------------------------

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com

-------------------------------------------------------

[Guest guest]

>I have been using two metal pitchers for my small lotion

>batches I have been making. Now I find in my saved info that

>stainless steel is recommended. Is this necessary?

Stainless steel and glass (Pyrex type) is best. Aluminum will corrode with

acidic formulas.

>I am finding that there are references to heating

>phase A and phase B to 80C, then combining. I also found reference

>to heat to 80C and hold this temp for several minutes. What would you

>recommend?

If you are uncertain about the microbial integrity of your water or your water

phase contains lots of organics that may be contaminated, you should hest to 80C

for several

minutes.

Maurice

--------------------------------------------------------

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com

-------------------------------------------------------

[Guest guest]

----- Original Message ----- >

>

> If you are uncertain about the microbial integrity of your water or your

water phase contains lots of organics that may be contaminated, you should

heat to 80C for several minutes.

>

> Maurice

OK, when I have been htg to 80C and holding, I have been replacing my lost

water before I combine with the oil phase. Now I find reference to

replacing lost water at the end of the lotion making process. Which is

recommended? When I premeasure oils for soap making I lose .1 oz of each

premeasured ingredient whether the ingredient was 4 #'s or 4 oz. I would

think I would lose this also in my oil phase and I would be replacing with

water what I lost in my container of oils. Most of my experiments have been

500 to 600 grams, but I suppose this would not be much of an issue when I

finally start to make larger batches. . . or would it?

My scale that measures to .000 gram only weighs up to 500 grams. My larger

scale (10,000 grams) only measures in 1 gram increments. Do you think this

is accurate enough to make 1 gallon size batches of lotion if the

preservative is measured on the smaller scale? (I do add a bit of the lotion

to a small glass pitcher, tare and then add the preservative so all ends up

in my lotion.)

btw, I really appreciate all the time that is spent answering questions on

this list. Despite my very basic questions, I have learned so much from so

many people on this list. THANK YOU!

[Guest guest]

On Sat, 20 Mar 2004 04:16:00 -0800, at Scents of Thyme wrote:

>OK, when I have been htg to 80C and holding, I have been replacing my lost

>water before I combine with the oil phase. Now I find reference to

>replacing lost water at the end of the lotion making process. Which is

>recommended?

I add the water lost due to evaporation at the end when the batch is

cooled down. If you add it earlier, you still lose water and will have

to add it again at the end.

>When I premeasure oils for soap making I lose .1 oz of each

>premeasured ingredient whether the ingredient was 4 #'s or 4 oz. I would

>think I would lose this also in my oil phase and I would be replacing with

>water what I lost in my container of oils. Most of my experiments have been

>500 to 600 grams, but I suppose this would not be much of an issue when I

>finally start to make larger batches. . . or would it?

The size of error will decrease as the batch size increases.

>My scale that measures to .000 gram only weighs up to 500 grams. My larger

>scale (10,000 grams) only measures in 1 gram increments. Do you think this

>is accurate enough to make 1 gallon size batches of lotion if the

>preservative is measured on the smaller scale?

Yes, you can use the smaller scale.

> (I do add a bit of the lotion

>to a small glass pitcher, tare and then add the preservative so all ends up

>in my lotion.)

I don't go to that trouble.

Maurice

--------------------------------------------------------

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com

-------------------------------------------------------